Carbon Resources Conversion最新文献_第2页

Pilot-scale biohydrogen production from Napier grass and oil palm frond: Comparison of SSF and pre-HF processes and the influence of trace metal supplementation on taxonomic and enzymatic profiles 纳皮草和油棕叶中试制氢：SSF和预hf过程的比较以及微量金属补充对分类和酶谱的影响

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-05-22 DOI: 10.1016/j.crcon.2025.100337

Khaliyah Sani , Nantharat Wongfaed , Wei-Cheng Wang , Shuheng Zhao , Peer Mohamed Abdul , Alissara Reungsang , Sureewan Sittijunda

This research aimed to develop a prototype process for hydrogen production from Napier grass (NG) and oil palm frond (OPF). First, biohydrogen production was investigated in batch experiments using either the simultaneous saccharification and fermentation (SSF) process or the pre-hydrolysis and fermentation (pre-HF) process under different NG to OPF ratios. The proportions of NG:OPF of 2.5:7.5, 5.0:5.0, and 7.5:2.5 g-VS/L were tested in both SSF and pre-HF. The results showed that the proportion of NG:OPF of 5.0:5.0 g-VS/L (ratio of 1:1) had the highest hydrogen production in both the SSF and pre-HF processes, with hydrogen production of 370 ± 21 mL-H₂/L and 993 ± 64 mL-H₂/L, respectively. Among these, pre-HF showed higher performance. Next, a semi-continuous experiment in a 100 L continuous stirred tank reactor (CSTR) with a pre-HF process and NG:OPF of 5.0:5.0 g-VS/L at hydraulic retention times (HRTs) of 4 and 3 days, with and without trace metal supplementation, was conducted. The highest hydrogen yield, 50.1 ± 3.4 mL-H₂/g-VS, was found at an HRT of 3 days with trace metal supplementation. Key microbes, including Lactococcus sp., Bacteroides sp., Dysgonomonas sp., and Enterobacter sp., showed increased abundance, improving hydrogen production from NG and OPF. The addition of trace elements significantly altered essential enzymes like 6-phosphofructokinase, which is crucial for forming pyruvate in hydrogen production. The medium-based economic analysis revealed that the pre-HF process with trace elements resulted in an overall hydrogen production of 9.32 m³, an improvement of 16.6 % compared to the 7.99 m³ obtained under pre-HF without adding trace elements. Consequently, the Economic Yield (EY) of pre-HF without trace element addition was 0.030 USD-H₂/USD-medium, which was enhanced to 0.035 USD-H₂/USD-medium by adding trace elements.

本研究旨在开发一种从纳皮草（NG）和油棕叶（OPF）中生产氢气的原型工艺。首先，在不同NG / OPF比例下，采用同步糖化发酵（SSF）工艺或预水解发酵（pre-HF）工艺对生物制氢进行了批量实验研究。在SSF和hf前期分别检测NG:OPF比例为2.5:7.5、5.0:5.0和7.5:2.5 g-VS/L。结果表明，在SSF和预hf过程中，NG:OPF比例为5.0:5.0 g-VS/L（比例为1:1）的产氢量最高，分别为370±21 mL-H2/L和993±64 mL-H2/L。其中，预hf表现出较高的性能。接下来，在100 L连续搅拌槽式反应器（CSTR）中进行半连续实验，采用预hf工艺，NG:OPF为5.0:5.0 g-VS/L，水力停留时间（HRTs）为4和3 d，添加和不添加微量金属。添加微量金属后，HRT为3 d，产氢率最高，为50.1±3.4 mL-H2/g-VS。关键微生物，包括乳球菌、拟杆菌、厌糖单胞菌和肠杆菌的丰度增加，提高了NG和OPF的产氢量。微量元素的添加显著改变了6-磷酸果糖激酶等必需酶，这对制氢过程中形成丙酮酸至关重要。中等经济分析表明，添加微量元素的预hf工艺的总产氢量为9.32 m3，比未添加微量元素的预hf工艺的7.99 m3提高了16.6%。结果表明，未添加微量元素前hf的经济产率为0.030 USD-H2/USD-medium，添加微量元素后预hf的经济产率为0.035 USD-H2/USD-medium。

{"title":"Pilot-scale biohydrogen production from Napier grass and oil palm frond: Comparison of SSF and pre-HF processes and the influence of trace metal supplementation on taxonomic and enzymatic profiles","authors":"Khaliyah Sani , Nantharat Wongfaed , Wei-Cheng Wang , Shuheng Zhao , Peer Mohamed Abdul , Alissara Reungsang , Sureewan Sittijunda","doi":"10.1016/j.crcon.2025.100337","DOIUrl":"10.1016/j.crcon.2025.100337","url":null,"abstract":"<div><div>This research aimed to develop a prototype process for hydrogen production from Napier grass (NG) and oil palm frond (OPF). First, biohydrogen production was investigated in batch experiments using either the simultaneous saccharification and fermentation (SSF) process or the pre-hydrolysis and fermentation (pre-HF) process under different NG to OPF ratios. The proportions of NG:OPF of 2.5:7.5, 5.0:5.0, and 7.5:2.5 g-VS/L were tested in both SSF and pre-HF. The results showed that the proportion of NG:OPF of 5.0:5.0 g-VS/L (ratio of 1:1) had the highest hydrogen production in both the SSF and pre-HF processes, with hydrogen production of 370 ± 21 mL-H<sub>2</sub>/L and 993 ± 64 mL-H<sub>2</sub>/L, respectively. Among these, pre-HF showed higher performance. Next, a semi-continuous experiment in a 100 L continuous stirred tank reactor (CSTR) with a pre-HF process and NG:OPF of 5.0:5.0 g-VS/L at hydraulic retention times (HRTs) of 4 and 3 days, with and without trace metal supplementation, was conducted. The highest hydrogen yield, 50.1 ± 3.4 mL-H<sub>2</sub>/g-VS, was found at an HRT of 3 days with trace metal supplementation. Key microbes, including <em>Lactococcus</em> sp., <em>Bacteroides</em> sp., <em>Dysgonomonas</em> sp., and <em>Enterobacter</em> sp., showed increased abundance, improving hydrogen production from NG and OPF. The addition of trace elements significantly altered essential enzymes like 6-phosphofructokinase, which is crucial for forming pyruvate in hydrogen production. The medium-based economic analysis revealed that the pre-HF process with trace elements resulted in an overall hydrogen production of 9.32 m<sup>3</sup>, an improvement of 16.6 % compared to the 7.99 m<sup>3</sup> obtained under pre-HF without adding trace elements. Consequently, the Economic Yield (EY) of pre-HF without trace element addition was 0.030 USD-H<sub>2</sub>/USD-medium, which was enhanced to 0.035 USD-H<sub>2</sub>/USD-medium by adding trace elements.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"9 1","pages":"Article 100337"},"PeriodicalIF":7.5,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the deactivation pathway of supported Ni catalyst in fluidized-bed dry reforming of methane at high space velocity 高空速甲烷流化床干重整负载型Ni催化剂失活途径研究

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-05-19 DOI: 10.1016/j.crcon.2025.100336

Na Xu , Yizheng Li , Jie Du , Zhanguo Zhang , Guangwen Xu

A 10 %Ni/γ⁃Al₂O₃ catalyst was prepared for dry reforming of methane. Spherical γ⁃Al₂O₃ particles having an average particle size of 60 µm were used as the support and an iso-volume impregnation method was employed for the preparation. All activity-evaluation tests were conducted in a fluidized-bed quartz reactor at 0.1 MPa and variable temperatures and space velocities for 600 min. The results of the tests revealed that at 750 °C the catalyst activity showed an obviously accelerated decrease trend with the increase of space velocity. Thermogravimetric analysis of the spent catalysts revealed, however, that little carbon deposit formed in those spent samples that had experienced faster decreases in activity at higher space velocities. While these two facts together deny the possibility of carbon deposition leading to the accelerated activity decline at 750 °C and high space velocities, increasing the CO₂/CH₄ ratio of the feed was demonstrated to further accelerate the activity decrease. Meanwhile, XRD and XPS analyses of the spent catalyst samples revealed that oxidative transformation of metallic Ni in catalyst to Ni_xO (x ≤ 1) species did occur in the reforming in the feed of CO₂/CH₄ = 1.5. All these results together have strongly revealed, for the first time, a conclusion as follows: it was the gradual oxidative transformation of active Ni sites in 10 %Ni/γ⁃Al₂O₃ catalyst to inactive Ni oxide species to cause a continuous decline of its dry reforming activity in fluidized-bed operation mode and at 750 °C and high space velocity condition.

制备了一种10% Ni/γ⁃Al2O3的甲烷干重整催化剂。采用平均粒径为60µm的球形γ⁃Al2O3颗粒作为载体，采用等体积浸渍法制备。所有活性评价试验均在0.1 MPa、可变温度和空速的流化床石英反应器中进行，时间为600分钟。实验结果表明，在750℃时，随着空速的增加，催化剂活性有明显加速下降的趋势。然而，对废催化剂的热重分析显示，在高空速下活性下降更快的废样品中，几乎没有碳沉积形成。虽然这两个事实共同否认了在750℃和高空速下碳沉积导致活性加速下降的可能性，但增加进料的CO2/CH4比被证明进一步加速了活性下降。同时，对废催化剂样品的XRD和XPS分析表明，在CO2/CH4 = 1.5的进料条件下，催化剂中的金属Ni确实发生了氧化转化为NixO （x≤1）的现象。以上结果首次有力地揭示了10% Ni/γ⁃Al2O3催化剂中活性Ni位点向非活性Ni氧化物的逐渐氧化转化是导致其在流化床操作模式和750℃高空速条件下干转化活性持续下降的原因。

{"title":"Study on the deactivation pathway of supported Ni catalyst in fluidized-bed dry reforming of methane at high space velocity","authors":"Na Xu , Yizheng Li , Jie Du , Zhanguo Zhang , Guangwen Xu","doi":"10.1016/j.crcon.2025.100336","DOIUrl":"10.1016/j.crcon.2025.100336","url":null,"abstract":"<div><div>A 10 %Ni/γ⁃Al<sub>2</sub>O<sub>3</sub> catalyst was prepared for dry reforming of methane. Spherical γ⁃Al<sub>2</sub>O<sub>3</sub> particles having an average particle size of 60 µm were used as the support and an <em>iso</em>-volume impregnation method was employed for the preparation. All activity-evaluation tests were conducted in a fluidized-bed quartz reactor at 0.1 MPa and variable temperatures and space velocities for 600 min. The results of the tests revealed that at 750 °C the catalyst activity showed an obviously accelerated decrease trend with the increase of space velocity. Thermogravimetric analysis of the spent catalysts revealed, however, that little carbon deposit formed in those spent samples that had experienced faster decreases in activity at higher space velocities. While these two facts together deny the possibility of carbon deposition leading to the accelerated activity decline at 750 °C and high space velocities, increasing the CO<sub>2</sub>/CH<sub>4</sub> ratio of the feed was demonstrated to further accelerate the activity decrease. Meanwhile, XRD and XPS analyses of the spent catalyst samples revealed that oxidative transformation of metallic Ni in catalyst to Ni<sub>x</sub>O (x ≤ 1) species did occur in the reforming in the feed of CO<sub>2</sub>/CH<sub>4</sub> = 1.5. All these results together have strongly revealed, for the first time, a conclusion as follows: it was the gradual oxidative transformation of active Ni sites in 10 %Ni/γ⁃Al<sub>2</sub>O<sub>3</sub> catalyst to inactive Ni oxide species to cause a continuous decline of its dry reforming activity in fluidized-bed operation mode and at 750 °C and high space velocity condition.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"9 1","pages":"Article 100336"},"PeriodicalIF":7.5,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recovered carbon black: A comprehensive review of activation, demineralization, and incorporation in rubber matrices 再生炭黑：在橡胶基质中活化、脱矿和掺入的综合综述

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-05-06 DOI: 10.1016/j.crcon.2025.100334

Clara M.C. Silva , Cristiana Maganinho , Adélio Mendes , João Rocha , Inês Portugal , Carlos M. Silva

The rapid growth of the automobile industry has substantially increased end-of-life tires (ELT) production with over 2 300 million units manufactured in 2022. Despite known processes to recover materials and energy from ELT, a significant number of tires still end up in landfills, posing environmental problems. Pyrolysis offers a promising alternative to produce energy and marketable products like recovered carbon black (rCB). Incorporating rCB into rubber matrices shows potential for partially replacing commercial carbon black, but more research is required to understand its reinforcing effects and recyclability through repeated pyrolysis cycles. Furthermore, tire composition variability affects rCB quality, challenging consistent production for market applications. Post-treatments like activation and demineralization enhance rCB properties but pose challenges, with higher activation degrees improving pore structure but reducing carbon content while demineralization removes impurities but raises concerns about chemical use and equipment wear. Further research is needed to develop scalable and economically viable post-treatments along with their life cycle assessment. Here, a comprehensive literature review on rCB activation and demineralization is presented and, since the ultimate goal is to reuse rCB in the production of new tires, the rCB incorporation into rubber matrices is also reviewed.

汽车工业的快速增长大大增加了废旧轮胎（ELT）的产量，2022年的产量超过23亿只。尽管已知的方法可以从ELT中回收材料和能源，但仍有相当数量的轮胎最终被填埋，造成环境问题。热解为生产能源和可销售产品（如再生炭黑（rCB））提供了一种有前途的替代方法。将rCB加入橡胶基质中显示出部分取代商用炭黑的潜力，但需要更多的研究来了解其强化效果和通过反复热解循环的可回收性。此外，轮胎成分的可变性会影响rCB的质量，对市场应用的一致性生产构成挑战。活化和脱矿等后处理提高了rCB的性能，但也带来了挑战，较高的活化程度改善了孔隙结构，但降低了碳含量，而脱矿去除杂质，但会引起化学品使用和设备磨损的担忧。需要进一步的研究来开发可扩展和经济上可行的后处理以及它们的生命周期评估。在这里，对rCB活化和脱矿进行了全面的文献综述，由于最终目标是在新轮胎的生产中重复使用rCB，因此也对rCB加入橡胶基质进行了综述。

{"title":"Recovered carbon black: A comprehensive review of activation, demineralization, and incorporation in rubber matrices","authors":"Clara M.C. Silva , Cristiana Maganinho , Adélio Mendes , João Rocha , Inês Portugal , Carlos M. Silva","doi":"10.1016/j.crcon.2025.100334","DOIUrl":"10.1016/j.crcon.2025.100334","url":null,"abstract":"<div><div>The rapid growth of the automobile industry has substantially increased end-of-life tires (ELT) production with over 2 300 million units manufactured in 2022. Despite known processes to recover materials and energy from ELT, a significant number of tires still end up in landfills, posing environmental problems. Pyrolysis offers a promising alternative to produce energy and marketable products like recovered carbon black (rCB). Incorporating rCB into rubber matrices shows potential for partially replacing commercial carbon black, but more research is required to understand its reinforcing effects and recyclability through repeated pyrolysis cycles. Furthermore, tire composition variability affects rCB quality, challenging consistent production for market applications. Post-treatments like activation and demineralization enhance rCB properties but pose challenges, with higher activation degrees improving pore structure but reducing carbon content while demineralization removes impurities but raises concerns about chemical use and equipment wear. Further research is needed to develop scalable and economically viable post-treatments along with their life cycle assessment. Here, a comprehensive literature review on rCB activation and demineralization is presented and, since the ultimate goal is to reuse rCB in the production of new tires, the rCB incorporation into rubber matrices is also reviewed.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"9 1","pages":"Article 100334"},"PeriodicalIF":7.5,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal-dissolution based carbon enrichment of biomass: Coking application of the Extract 基于热溶解的生物质碳富集：萃取物的焦化应用

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-05-02 DOI: 10.1016/j.crcon.2025.100335

Zhenzhong Hu , Dawei Hu , Xianzhe Liu , Xian Li , Xiaoyong Zhang , Linlin Yi , Guangqian Luo , Hongyun Hu , Hong Yao

The steel industry’s massive iron production in China necessitates urgent development of low-CO₂-emission coking technologies. While carbon–neutral biomass represents a promising substitute for metallurgical coals, its detrimental impacts on coke quality raise significant concerns. This study experimentally validates a novel biomass-based metallurgical feedstock preparation method – Thermal-dissolution based carbon enrichment (TDCE) − through pilot-scale trials. By replacing 10–20% of caking/fat coal with biomass Extract, the coke strength after reaction of cokes increased from 41.72% to 44.80%, while the coke reactivity index decreased from 35.24% to 30.56%. These results confirm the technical viability and competitive advantages of biomass Extract over conventional bonded coals in terms of both cost-effectiveness and renewability. Mechanistic analysis reveals that the TDCE process induces deep aromatization and structural alignment in biomass, endowing the Extract with thermoplastic properties comparable to viscous components in bonded coals. This modified Extract significantly enhances metaplast formation during the plastic stage by extending the plastic temperature range. Moreover, the low ash content and renewability properties of Extract further contributes to the clean and low-CO₂-emission preparation of metallurgical cokes. Therefore, this study provides a novel, green and effective biomass-based coking strategy with great potential for industrial application.

中国钢铁工业的大规模钢铁生产迫切需要开发低二氧化碳排放的焦化技术。虽然碳中性生物质代表了冶金煤的一种很有前途的替代品，但它对焦炭质量的有害影响引起了人们的极大关注。本研究通过中试验证了一种新的生物质冶金原料制备方法-热溶解碳富集（TDCE）。用生物质抽提液替代10-20%的结焦/脂肪煤，焦炭反应后的焦炭强度由41.72%提高到44.80%，反应性指数由35.24%降低到30.56%。这些结果证实了生物质提取物在成本效益和可再生性方面优于传统结合煤的技术可行性和竞争优势。机理分析表明，TDCE过程在生物质中引起了深度芳构化和结构取向，使萃取物具有与粘合煤中的粘性组分相当的热塑性性能。这种改性提取物通过延长塑性温度范围，显著提高了塑性阶段的元质体形成。此外，萃取物的低灰分含量和可再生特性进一步有助于冶金焦的清洁和低二氧化碳排放制备。因此，本研究提供了一种新颖、绿色、有效的生物质焦化策略，具有很大的工业应用潜力。

{"title":"Thermal-dissolution based carbon enrichment of biomass: Coking application of the Extract","authors":"Zhenzhong Hu , Dawei Hu , Xianzhe Liu , Xian Li , Xiaoyong Zhang , Linlin Yi , Guangqian Luo , Hongyun Hu , Hong Yao","doi":"10.1016/j.crcon.2025.100335","DOIUrl":"10.1016/j.crcon.2025.100335","url":null,"abstract":"<div><div>The steel industry’s massive iron production in China necessitates urgent development of low-CO<sub>2</sub>-emission coking technologies. While carbon–neutral biomass represents a promising substitute for metallurgical coals, its detrimental impacts on coke quality raise significant concerns. This study experimentally validates a novel biomass-based metallurgical feedstock preparation method – Thermal-dissolution based carbon enrichment (TDCE) − through pilot-scale trials. By replacing 10–20% of caking/fat coal with biomass Extract, the coke strength after reaction of cokes increased from 41.72% to 44.80%, while the coke reactivity index decreased from 35.24% to 30.56%. These results confirm the technical viability and competitive advantages of biomass Extract over conventional bonded coals in terms of both cost-effectiveness and renewability. Mechanistic analysis reveals that the TDCE process induces deep aromatization and structural alignment in biomass, endowing the Extract with thermoplastic properties comparable to viscous components in bonded coals. This modified Extract significantly enhances metaplast formation during the plastic stage by extending the plastic temperature range. Moreover, the low ash content and renewability properties of Extract further contributes to the clean and low-CO<sub>2</sub>-emission preparation of metallurgical cokes. Therefore, this study provides a novel, green and effective biomass-based coking strategy with great potential for industrial application.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"9 1","pages":"Article 100335"},"PeriodicalIF":7.5,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-pillared hierarchical Silicalite-1 zeolites for enhanced Suzuki-Miyaura coupling reactions 增强Suzuki-Miyaura偶联反应的自柱状分层硅石-1沸石

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-04-15 DOI: 10.1016/j.crcon.2025.100331

Xicheng Jia , Jianxin Liu , Yuming Zhang , Dahong Jiang

The Suzuki coupling reaction is a widely employed technique for the synthesis of biaryl compounds in various disciplines. This study introduces the development of a highly efficient and recyclable palladium-doped Silicalite-1 (S-1) catalyst featuring a hierarchical structure, which enhances the efficacy of Suzuki coupling reactions. By utilizing tetra-n-butylphosphonium hydroxide as a structure-directing agent and adjusting the molar ratios of ethanol and water in the synthetic precursor, we successfully produced a range of porous S-1 catalysts. These catalysts displayed a unique architecture characterized by interconnected thin pillars or lamellae. The catalyst’s remarkable specific activity facilitated rapid Suzuki coupling reactions, completing within just three hours under environmentally benign conditions. The Suzuki reaction mechanism was discussed, which involves an oxidative addition of bromobenzene to heterogeneous Pd, followed by metal exchange with phenyl boronic acid and completed by a reductive elimination. Comprehensive substrate screening, selectivity assessments, and recycling studies were also undertaken.

铃木偶联反应是合成联芳基化合物的一种广泛应用的技术。本研究介绍了一种高效、可回收的掺杂钯硅-1 （S-1）催化剂的开发，该催化剂具有层次化结构，提高了铃木偶联反应的效率。利用四正丁基氢氧化磷作为结构导向剂，调节前驱体中乙醇和水的摩尔比，成功制备了一系列多孔S-1催化剂。这些催化剂表现出独特的结构特征，即相互连接的薄柱或薄片。催化剂显著的比活性促进了快速的铃木偶联反应，在无害环境的条件下，仅需3小时即可完成。讨论了溴苯氧化加成非均相钯，与苯硼酸进行金属交换，并通过还原消除完成的铃木反应机理。还进行了全面的底物筛选、选择性评估和回收研究。

{"title":"Self-pillared hierarchical Silicalite-1 zeolites for enhanced Suzuki-Miyaura coupling reactions","authors":"Xicheng Jia , Jianxin Liu , Yuming Zhang , Dahong Jiang","doi":"10.1016/j.crcon.2025.100331","DOIUrl":"10.1016/j.crcon.2025.100331","url":null,"abstract":"<div><div>The Suzuki coupling reaction is a widely employed technique for the synthesis of biaryl compounds in various disciplines. This study introduces the development of a highly efficient and recyclable palladium-doped Silicalite-1 (S-1) catalyst featuring a hierarchical structure, which enhances the efficacy of Suzuki coupling reactions. By utilizing tetra-n-butylphosphonium hydroxide as a structure-directing agent and adjusting the molar ratios of ethanol and water in the synthetic precursor, we successfully produced a range of porous S-1 catalysts. These catalysts displayed a unique architecture characterized by interconnected thin pillars or lamellae. The catalyst’s remarkable specific activity facilitated rapid Suzuki coupling reactions, completing within just three hours under environmentally benign conditions. The Suzuki reaction mechanism was discussed, which involves an oxidative addition of bromobenzene to heterogeneous Pd, followed by metal exchange with phenyl boronic acid and completed by a reductive elimination. Comprehensive substrate screening, selectivity assessments, and recycling studies were also undertaken.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 4","pages":"Article 100331"},"PeriodicalIF":7.5,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced performance of gasification by blending coal into biomass in a fluidized bed two-stage system 在流化床两级系统中混合煤与生物质提高气化性能

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-04-15 DOI: 10.1016/j.crcon.2025.100333

Chao Wang , Hanyang Li , Mengjuan Zhang , Zhenglin Wang , Zhennan Han , Xin Jia , Gang Song , Kaixuan Yang , Guoqing Guan , Guangwen Xu

Biomass, blended with a small amount of coal, was fed into a fluidized bed two-stage gasifier to produce low-tar H₂-rich gas through O₂-rich gasification. The blended coal improved the energy density of biomass fuel and also worked as the bed material. For the fluidized bed two-stage gasification, large char particles of biomass and coal tend to accumulate at the bottom of the gasifier (a riser) to form a carbon-rich reaction zone there. Then, the O₂ coming from the bottom of the gasifier mainly reacts with such char, consequently suppressing its interaction with the gases including H₂ from pyrolyzer. Using O₂-rich air with an ER of 0.35 and at gasification temperatures of about 890 °C, gasifying biomass blending 10 wt% coal produced gas containing 13.3 vol% CO, 20.1 vol% CO₂, 4.3 vol% CH₄, and 9.8 vol% H₂, giving an LHV of 4.9 MJ/Nm³_d. Tar content in the produced gas gradually decreased with time, and over the last 6 h the measured content was 0.012 g/Nm³_d. Steady operation was well achieved, showing the performance without ash agglomeration for the O₂-rich gasification of biomass.

将生物质与少量煤混合，送入流化床两段气化炉，通过富o2气化生产低焦油富h2气。混合煤提高了生物质燃料的能量密度，也可作为床料。对于流化床两段气化，生物质和煤的大炭颗粒倾向于积聚在气化炉底部（提升管），在那里形成富碳反应区。然后，来自气化炉底部的O2主要与这种焦炭反应，从而抑制其与热解器产生的H2等气体的相互作用。使用ER为0.35的富o2空气，在890°C的气化温度下，气化生物质混合10 wt%煤产生的含有13.3 vol% CO, 20.1 vol% CO2, 4.3 vol% CH4和9.8 vol% H2的气体，LHV为4.9 MJ/Nm3d。采出气中焦油含量随时间逐渐降低，最后6 h测得含量为0.012 g/Nm3d。稳定运行效果良好，显示了富氧生物质气化无灰结块的性能。

{"title":"Enhanced performance of gasification by blending coal into biomass in a fluidized bed two-stage system","authors":"Chao Wang , Hanyang Li , Mengjuan Zhang , Zhenglin Wang , Zhennan Han , Xin Jia , Gang Song , Kaixuan Yang , Guoqing Guan , Guangwen Xu","doi":"10.1016/j.crcon.2025.100333","DOIUrl":"10.1016/j.crcon.2025.100333","url":null,"abstract":"<div><div>Biomass, blended with a small amount of coal, was fed into a fluidized bed two-stage gasifier to produce low-tar H<sub>2</sub>-rich gas through O<sub>2</sub>-rich gasification. The blended coal improved the energy density of biomass fuel and also worked as the bed material. For the fluidized bed two-stage gasification, large char particles of biomass and coal tend to accumulate at the bottom of the gasifier (a riser) to form a carbon-rich reaction zone there. Then, the O<sub>2</sub> coming from the bottom of the gasifier mainly reacts with such char, consequently suppressing its interaction with the gases including H<sub>2</sub> from pyrolyzer. Using O<sub>2</sub>-rich air with an ER of 0.35 and at gasification temperatures of about 890 °C, gasifying biomass blending 10 wt% coal produced gas containing 13.3 vol% CO, 20.1 vol% CO<sub>2</sub>, 4.3 vol% CH<sub>4</sub>, and 9.8 vol% H<sub>2</sub>, giving an LHV of 4.9 MJ/Nm<sup>3</sup><sub>d</sub>. Tar content in the produced gas gradually decreased with time, and over the last 6 h the measured content was 0.012 g/Nm<sup>3</sup><sub>d</sub>. Steady operation was well achieved, showing the performance without ash agglomeration for the O<sub>2</sub>-rich gasification of biomass.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 4","pages":"Article 100333"},"PeriodicalIF":7.5,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorption of heavy metals from water using teak-based carbon material through graft copolymerization 柚木基碳材料接枝共聚对水中重金属的吸附研究

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-04-10 DOI: 10.1016/j.crcon.2025.100332

Jin-Wei Zhang , Nguyen Duy Hai , Muhammad Al Kholif , Huan-Ping Chao

This study presents the development of carbonaceous adsorbents derived from teak wood waste for the removal of heavy metals, such as lead (Pb²⁺), copper (Cu²⁺), and cadmium (Cd²⁺) from aqueous solutions. The adsorbents − hydrochar (TH), biochar (TB), and activated carbon (TAC) − were synthesized through thermal and chemical activation processes and further enhanced by graft copolymerization using acrylic acid. Comprehensive characterizations, including SEM, EDS, XPS, BET, and FTIR, revealed that grafting significantly increased surface functional groups (COOH and OH), thereby improving adsorption capacities. Adsorption isotherms followed the Langmuir model, indicating a chemisorption mechanism dominated by ion exchange and complexation. Post-grafting, maximum adsorption capacities for Pb²⁺ increased from 116 mg/g (TH) to 294 mg/g (THG), Cu²⁺ from 84 mg/g (TH) to 164 mg/g (THG), and Cd²⁺ from 106 mg/g (TH) to 170 mg/g (THG). The study concludes that grafted teak-based materials hold high potential as cost-effective and efficient adsorbents for water purification applications, contributing to sustainable waste management and environmental protection.

本研究介绍了从柚木废料中提取的碳质吸附剂的开发，用于去除水溶液中的重金属，如铅（Pb2+），铜（Cu2+）和镉（Cd2+）。通过热活化法和化学活化法合成了氢炭（TH）、生物炭（TB）和活性炭（TAC），并通过丙烯酸接枝共聚进一步增强了吸附剂的性能。SEM、EDS、XPS、BET和FTIR等综合表征表明，接枝能显著增加表面官能团（COOH和OH），从而提高吸附能力。吸附等温线符合Langmuir模型，表明化学吸附机制以离子交换和络合为主。接枝后，Pb2+的最大吸附量从116 mg/g （THG）增加到294 mg/g (THG)， Cu2+从84 mg/g （THG）增加到164 mg/g (THG)， Cd2+从106 mg/g （TH）增加到170 mg/g （THG）。该研究得出结论，接枝柚木基材料在水净化应用中具有很高的成本效益和高效吸附剂的潜力，有助于可持续的废物管理和环境保护。

{"title":"Adsorption of heavy metals from water using teak-based carbon material through graft copolymerization","authors":"Jin-Wei Zhang , Nguyen Duy Hai , Muhammad Al Kholif , Huan-Ping Chao","doi":"10.1016/j.crcon.2025.100332","DOIUrl":"10.1016/j.crcon.2025.100332","url":null,"abstract":"<div><div>This study presents the development of carbonaceous adsorbents derived from teak wood waste for the removal of heavy metals, such as lead (Pb<sup>2+</sup>), copper (Cu<sup>2+</sup>), and cadmium (Cd<sup>2+</sup>) from aqueous solutions. The adsorbents − hydrochar (TH), biochar (TB), and activated carbon (TAC) − were synthesized through thermal and chemical activation processes and further enhanced by graft copolymerization using acrylic acid. Comprehensive characterizations, including SEM, EDS, XPS, BET, and FTIR, revealed that grafting significantly increased surface functional groups (COOH and OH), thereby improving adsorption capacities. Adsorption isotherms followed the Langmuir model, indicating a chemisorption mechanism dominated by ion exchange and complexation. Post-grafting, maximum adsorption capacities for Pb<sup>2+</sup> increased from 116 mg/g (TH) to 294 mg/g (THG), Cu<sup>2+</sup> from 84 mg/g (TH) to 164 mg/g (THG), and Cd<sup>2+</sup> from 106 mg/g (TH) to 170 mg/g (THG). The study concludes that grafted teak-based materials hold high potential as cost-effective and efficient adsorbents for water purification applications, contributing to sustainable waste management and environmental protection.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 4","pages":"Article 100332"},"PeriodicalIF":7.5,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bio-based papers from seaweed and coconut fiber: sustainable materials for a greener future 海藻和椰子纤维制成的生物基纸：绿色未来的可持续材料

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-04-03 DOI: 10.1016/j.crcon.2025.100329

Nida Khan , K. Sudhakar , R. Mamat

The paper industry’s reliance on deforestation for wood pulp has raised environmental concerns and led to fluctuating prices. This study explores the potential of seaweed (Sargassum wightii) and coconut waste, abundant in Malaysia, as sustainable alternatives for biopaper production. These materials offer a promising solution to mitigate deforestation, address waste issues, and promote sustainable manufacturing. Three biopaper samples were fabricated using 100 % seaweed, 100 % coconut fiber, and a 50/50 blend of seaweed and coconut fiber. The blending of seaweed and coconut fiber allows for customising biopaper properties, such as density and flexibility, making it suitable for a broader range of applications. To characterise these biopapers, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) were employed. Additionally, the grammage (GSM) of each biopaper was determined to compare it with traditional wood pulp-based paper to explore its potential applications. FTIR analysis revealed a wide peak between 3343.47 cm⁻¹ and 3355.75 cm⁻¹ in all samples, confirming the existence of O–H bonds often observed in alcohols. TGA examination at 900 °C demonstrated considerable char production, with the seaweed-based bio paper yielding the most char (26.6 %), followed by the coconut-based paper (15.17 %) and the seaweed-coconut mix (13.49 %). The XRD examination indicates that the structure is largely amorphous, with broad peaks in the 2θ range of 11° to 23°. Water absorption test showed that all biopaper samples were hydrophilic; absorption rates for seaweed-based biopaper were 128 g/m², coconut-based biopaper was 580 g/m², and the mix of seaweed and coconut was 446 g/m². High biodegradability was demonstrated by soil burial tests, which indicated weight reductions of 23 %, 57 %, and 64 % for the blended biopaper, seaweed, and coconut after 14 days, respectively. These results highlight Sargassum wightii’s potential as a sustainable biopaper material. When mixed with coconut fiber waste, it can increase density and broaden its possible applications, providing a viable alternative to wood-based papers while also encouraging environmental sustainability.

造纸业依赖砍伐森林生产木浆，这引起了人们对环境的担忧，并导致价格波动。本研究探索了马来西亚丰富的海藻（马尾藻）和椰子废料作为生物纸生产的可持续替代品的潜力。这些材料为减轻森林砍伐、解决废物问题和促进可持续制造业提供了一个有希望的解决方案。用100%海藻、100%椰子纤维和50/50海藻和椰子纤维混合制备了三种生物纸样品。海藻和椰子纤维的混合可以定制生物纸的特性，如密度和灵活性，使其适用于更广泛的应用。利用扫描电子显微镜（SEM）、热重分析（TGA）、傅里叶变换红外光谱（FTIR）和x射线衍射（XRD）对这些生物膜进行了表征。此外，确定了每种生物纸的克重（GSM），并将其与传统木浆基纸进行比较，以探索其潜在的应用前景。FTIR分析显示，在所有样品中，3343.47 cm−1和3355.75 cm−1之间有一个宽峰，证实了醇中常见的O-H键的存在。900°C时的TGA测试显示出相当大的碳产量，其中以海藻为基础的生物纸的碳产量最高（26.6%），其次是椰子纸（15.17%）和海藻-椰子混合物（13.49%）。XRD分析表明，该材料在11°~ 23°的2θ范围内具有较宽的峰，结构基本呈非晶态。吸水试验表明，所有生物纸样品均具有亲水性；海藻基生物纸的吸收率为128 g/m2，椰子基生物纸的吸收率为580 g/m2，海藻和椰子的混合吸收率为446 g/m2。土壤掩埋试验表明，高生物降解性表明，混合生物纸、海藻和椰子在14天后分别减轻了23%、57%和64%的重量。这些结果突出了马尾藻作为可持续生物纸材料的潜力。当与椰子纤维废物混合时，它可以增加密度并扩大其可能的应用范围，为木基纸提供可行的替代品，同时也鼓励环境的可持续性。

{"title":"Bio-based papers from seaweed and coconut fiber: sustainable materials for a greener future","authors":"Nida Khan , K. Sudhakar , R. Mamat","doi":"10.1016/j.crcon.2025.100329","DOIUrl":"10.1016/j.crcon.2025.100329","url":null,"abstract":"<div><div>The paper industry’s reliance on deforestation for wood pulp has raised environmental concerns and led to fluctuating prices. This study explores the potential of seaweed (<em>Sargassum wightii</em>) and coconut waste, abundant in Malaysia, as sustainable alternatives for biopaper production. These materials offer a promising solution to mitigate deforestation, address waste issues, and promote sustainable manufacturing. Three biopaper samples were fabricated using 100 % seaweed, 100 % coconut fiber, and a 50/50 blend of seaweed and coconut fiber. The blending of seaweed and coconut fiber allows for customising biopaper properties, such as density and flexibility, making it suitable for a broader range of applications. To characterise these biopapers, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) were employed. Additionally, the grammage (GSM) of each biopaper was determined to compare it with traditional wood pulp-based paper to explore its potential applications. FTIR analysis revealed a wide peak between 3343.47 cm<sup>−1</sup> and 3355.75 cm<sup>−1</sup> in all samples, confirming the existence of O–H bonds often observed in alcohols. TGA examination at 900 °C demonstrated considerable char production, with the seaweed-based bio paper yielding the most char (26.6 %), followed by the coconut-based paper (15.17 %) and the seaweed-coconut mix (13.49 %). The XRD examination indicates that the structure is largely amorphous, with broad peaks in the 2θ range of 11° to 23°. Water absorption test showed that all biopaper samples were hydrophilic; absorption rates for seaweed-based biopaper were 128 g/m<sup>2</sup>, coconut-based biopaper was 580 g/m<sup>2</sup>, and the mix of seaweed and coconut was 446 g/m<sup>2</sup>. High biodegradability was demonstrated by soil burial tests, which indicated weight reductions of 23 %, 57 %, and 64 % for the blended biopaper, seaweed, and coconut after 14 days, respectively. These results highlight <em>Sargassum wightii</em>’s potential as a sustainable biopaper material. When mixed with coconut fiber waste, it can increase density and broaden its possible applications, providing a viable alternative to wood-based papers while also encouraging environmental sustainability.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 4","pages":"Article 100329"},"PeriodicalIF":7.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Progressive adaptation of microalgae consortium to elevated carbon dioxide coupled with enhanced production of essential fatty acids 微藻联合体对高浓度二氧化碳的逐步适应以及必需脂肪酸的增强生产

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-04-02 DOI: 10.1016/j.crcon.2025.100330

Alston Bernard D’Souza , Atiqur Rahaman , Khandaker Asif Ahmed , Elena Adaschewski , Dieter Hanelt , Abdelfatah Abomohra

This study investigated the possible adaptation of a microalgae consortium to elevated carbon dioxide (CO₂) concentrations reaching up to 50 % v/v in a lab-scale photobioreactor (PBR). Results showed a significant reduction in the growth rate of the consortium with increasing CO₂ supplementation, from 1.327 d^-1 in the initial culture without CO₂ supplementation to 0.369 d^-1 at 50 % CO₂. At the lowest applied CO₂ supplementation of 10%, the growth rate was 0.735 d^-1. Interestingly, supplementation of 40% CO₂ in the final run showed insignificant difference in the growth rate of the consortium compared to that at 10% CO₂. Microbial community analysis revealed a shift towards bacterial genera that enhance the microalgal growth, while some algal genera (mainly Tetradesmus and Chlorella) became more dominant under CO₂ enrichment. Compared to the initial consortium, the proportion of polyunsaturated fatty acids (PUFAs) increased from 36.2% to 58.1% under 40% CO₂, mainly due to the increase in the proportion of essential fatty acids (EFAs) such as alpha-linolenic acid (ALA) and linoleic acid (LA). Under 40% CO₂ supplementation, an increase in cell size was observed, despite a reduction in cell number. This study highlights the potential of microalgae consortia to adapt to high CO₂ levels, leading to a dominance of certain algal genera. This adaptation improves the production of EFAs, thereby contributing to both environmental sustainability and industrial applications.

本研究探讨了微藻联合体在实验室规模光生物反应器（PBR）中对二氧化碳（CO2）浓度升高达到50% v/v的可能适应性。结果表明，随着CO2添加量的增加，该联合体的生长速率显著降低，从初始培养时不添加CO2的1.327 d-1降至50% CO2时的0.369 d-1。最低CO2添加量为10%时，生长速率为0.735 d-1。有趣的是，在最后一次运行中补充40%的二氧化碳与10%的二氧化碳相比，联合体的生长速度没有显著差异。微生物群落分析显示，在CO2富集条件下，微藻的生长向有利于微藻生长的细菌属转移，而一些藻类属（主要是四角藻和小球藻）则变得更占优势。与初始财团相比，在40% CO2下，多不饱和脂肪酸（PUFAs）的比例从36.2%增加到58.1%，主要是由于必需脂肪酸（EFAs）如α -亚麻酸（ALA）和亚油酸（LA）的比例增加。在补充40%二氧化碳的情况下，观察到细胞大小增加，尽管细胞数量减少。这项研究强调了微藻联合体适应高二氧化碳水平的潜力，导致某些藻类属的优势。这种适应改进了EFAs的生产，从而促进了环境可持续性和工业应用。

{"title":"Progressive adaptation of microalgae consortium to elevated carbon dioxide coupled with enhanced production of essential fatty acids","authors":"Alston Bernard D’Souza , Atiqur Rahaman , Khandaker Asif Ahmed , Elena Adaschewski , Dieter Hanelt , Abdelfatah Abomohra","doi":"10.1016/j.crcon.2025.100330","DOIUrl":"10.1016/j.crcon.2025.100330","url":null,"abstract":"<div><div>This study investigated the possible adaptation of a microalgae consortium to elevated carbon dioxide (CO<sub>2</sub>) concentrations reaching up to 50 % <em>v/v</em> in a lab-scale photobioreactor (PBR). Results showed a significant reduction in the growth rate of the consortium with increasing CO<sub>2</sub> supplementation, from 1.327 d<sup>-1</sup> in the initial culture without CO<sub>2</sub> supplementation to 0.369 d<sup>-1</sup> at 50 % CO<sub>2</sub>. At the lowest applied CO<sub>2</sub> supplementation of 10%, the growth rate was 0.735 d<sup>-1</sup>. Interestingly, supplementation of 40% CO<sub>2</sub> in the final run showed insignificant difference in the growth rate of the consortium compared to that at 10% CO<sub>2</sub>. Microbial community analysis revealed a shift towards bacterial genera that enhance the microalgal growth, while some algal genera (mainly <em>Tetradesmus</em> and <em>Chlorella</em>) became more dominant under CO<sub>2</sub> enrichment. Compared to the initial consortium, the proportion of polyunsaturated fatty acids (PUFAs) increased from 36.2% to 58.1% under 40% CO<sub>2</sub>, mainly due to the increase in the proportion of essential fatty acids (EFAs) such as alpha-linolenic acid (ALA) and linoleic acid (LA). Under 40% CO<sub>2</sub> supplementation, an increase in cell size was observed, despite a reduction in cell number. This study highlights the potential of microalgae consortia to adapt to high CO<sub>2</sub> levels, leading to a dominance of certain algal genera. This adaptation improves the production of EFAs, thereby contributing to both environmental sustainability and industrial applications.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 4","pages":"Article 100330"},"PeriodicalIF":7.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing hydraulic retention time for methane production from the hydrogenic effluent left over from the co-digestion of vinasse and spent brewer's yeast cell 优化酒糟与废啤酒酵母细胞共消化产氢废水产甲烷的水力停留时间

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-04-01 DOI: 10.1016/j.crcon.2025.100328

Chatchawin Nualsri , Chakkrit Sreela-or , Punnada Tharangsri , Worapong Wongarmat , Alissara Reungsang , Sureewan Sittijunda

This study aims to optimize the hydraulic retention time (HRT) for the methane production from hydrogenic effluent derived from the co-digestion of vinasse and spent brewer's yeast cells. The experiments were conducted in a continuous stirred tank reactor (CSTR) at various HRTs ranging from 60 to 5 days. The results showed that optimal performance was achieved at HRT 10 days. Under this HRT, yielding a maximum methane production rate of 853.6 mL/L·d and a methane yield of 304.9 mL/g-VS, with a COD removal efficiency of 53.86 %. The microbial community analysis revealed distinct patterns across different HRTs, with shorter HRTs (5–15 days) dominated by Bathyarchaeia-related taxa and Thermoplasmatota, while longer HRTs (30–60 days) showed the predominance of traditional methanogenic archaea within the Euryarchaeota phylum. The methane production process involved both acetoclastic and hydrogenotrophic pathways, with enhanced efficiency observed under shorter HRTs where both pathways coexisted. The greenhouse gas reduction potential analysis revealed that implementing this process could potentially reduce emissions by 1,026,206 tCO₂eq/year through the substitution of fossil fuel-based electricity with methane-derived power.

本研究旨在优化酒糟与啤酒酵母细胞共消化产氢废水产甲烷的水力停留时间（HRT）。实验在连续搅拌槽式反应器（CSTR）中进行，hrt从60天到5天不等。结果表明，HRT第10天达到最佳性能。在此HRT下，产甲烷量最大为853.6 mL/L·d，产甲烷量为304.9 mL/g-VS， COD去除率为53.86%。微生物群落分析显示不同hrt间存在明显差异，hrt较短（5 ~ 15 d）以深海古菌相关类群和热原菌为主，hrt较长（30 ~ 60 d）以Euryarchaeota门的传统产甲烷古菌为主。甲烷生产过程包括丙酮裂解和氢营养两种途径，当两种途径共存时，较短的hrt可以提高效率。温室气体减排潜力分析显示，实施这一过程可以通过用甲烷发电替代化石燃料发电，每年减少1,026,206吨二氧化碳当量。

{"title":"Optimizing hydraulic retention time for methane production from the hydrogenic effluent left over from the co-digestion of vinasse and spent brewer's yeast cell","authors":"Chatchawin Nualsri , Chakkrit Sreela-or , Punnada Tharangsri , Worapong Wongarmat , Alissara Reungsang , Sureewan Sittijunda","doi":"10.1016/j.crcon.2025.100328","DOIUrl":"10.1016/j.crcon.2025.100328","url":null,"abstract":"<div><div>This study aims to optimize the hydraulic retention time (HRT) for the methane production from hydrogenic effluent derived from the co-digestion of vinasse and spent brewer's yeast cells. The experiments were conducted in a continuous stirred tank reactor (CSTR) at various HRTs ranging from 60 to 5 days. The results showed that optimal performance was achieved at HRT 10 days. Under this HRT, yielding a maximum methane production rate of 853.6 mL/L·d and amethane yield of 304.9 mL/g-VS, with a COD removal efficiency of 53.86 %. The microbial community analysis revealed distinct patterns across different HRTs, with shorter HRTs (5–15 days) dominated by Bathyarchaeia-related taxa and Thermoplasmatota, while longer HRTs (30–60 days) showed thepredominance of traditional methanogenic archaea within the Euryarchaeota phylum. The methane production process involved both acetoclastic and hydrogenotrophic pathways, with enhanced efficiency observed under shorter HRTs where both pathways coexisted. The greenhouse gas reduction potential analysis revealed that implementing this process could potentially reduce emissions by 1,026,206 tCO<sub>2</sub>eq/year through the substitution of fossil fuel-based electricity with methane-derived power.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 4","pages":"Article 100328"},"PeriodicalIF":7.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0