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Outside Back Cover 封底外侧
IF 6.4 3区 环境科学与生态学 Q2 ENERGY & FUELS Pub Date : 2024-09-01 DOI: 10.1016/S2588-9133(24)00071-1
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引用次数: 0
Developments and challenges on enhancement of photocatalytic CO2 reduction through photocatalysis 通过光催化增强光催化二氧化碳还原的发展与挑战
IF 6 3区 环境科学与生态学 Q2 ENERGY & FUELS Pub Date : 2024-06-04 DOI: 10.1016/j.crcon.2024.100263
Haiquan Wang , Qingjie Guo , Hongyan Zhang , Cheng Zuo

The conversion of CO2 into high-value fuels and chemicals has garnered research interest worldwide. The conversion and utilization of CO2 has become one of the most urgent tasks for society. In this context, using solar energy to convert CO2 into high-value fuels such as CH4 and CH3OH has extremely high potential application value. Herein, the research progress and results of applying various photocatalysts in photocatalytic CO2 reduction with various novel catalysts were reviewed. Furthermore, strategies for improving photocatalytic performance were reviewed. Finally, improving the catalytic mechanism of catalysts and designing novel high-activity, high-stability catalysts through comprehensive exploration of the reaction mechanism were suggested to meet the future requirements of industrial production.

将二氧化碳转化为高价值的燃料和化学品已引起全世界的研究兴趣。二氧化碳的转化和利用已成为社会最紧迫的任务之一。在此背景下,利用太阳能将 CO2 转化为 CH4 和 CH3OH 等高价值燃料具有极高的潜在应用价值。本文综述了利用各种新型催化剂光催化还原二氧化碳的研究进展和成果。此外,还综述了提高光催化性能的策略。最后,通过对反应机理的全面探索,提出了改进催化剂催化机理和设计新型高活性、高稳定性催化剂的建议,以满足未来工业生产的要求。
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引用次数: 0
Outside Back Cover 封底外侧
IF 6 3区 环境科学与生态学 Q2 ENERGY & FUELS Pub Date : 2024-05-20 DOI: 10.1016/S2588-9133(24)00049-8
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引用次数: 0
Hydrocarbon-conversion reaction and new paraffin-kinetic model during straight-run gas oil (SRGO) hydrotreating 直馏瓦斯油(SRGO)加氢处理过程中的碳氢化合物转化反应和新的石蜡动力学模型
IF 6.4 3区 环境科学与生态学 Q2 ENERGY & FUELS Pub Date : 2024-04-15 DOI: 10.1016/j.crcon.2024.100246

A series of related experiments were carried out based on prepared hydrocracking catalyst, Catalyst-HC. Ni & W and USY molecular sieve were selected as the hydrogenation active component and the cracking component of Catalyst-HC, respectively. Meanwhile, a kinetic model for paraffin conversion was constructed based on paraffin conversion law. Results obtained through this work indicate that the impact of H2-pressure is relatively complex. As the H2-pressure changes, the degree of hydrocracking reaction may be influenced by both hydrogen supply capacity and hydrogen proton concentration. Obtained conversion priority for three types of hydrocarbons on USY molecular sieve is as follows, aromatic ≫ cycloalkane > paraffin. Aromatic content in SRGO can affect its paraffin-retention in Hydro-D. Compared with the hydrotreating of SRGO with low aromatic content, when SRGO with relatively higher aromatic content is hydrotreated, its paraffin-retention is higher and its paraffin loss is also relatively smaller. Base on constructed model, the calculated values of SRGO-BJ conversion rate and paraffin-retention in Hydro-D are within ±10 % and ±5 % error lines, respectively. Thus, model schematic diagram is reasonable and can provide modeling reference for relevant model research.

以制备的加氢裂化催化剂 Catalyst-HC 为基础,进行了一系列相关实验。选择 Ni & W 和 USY 分子筛分别作为催化剂-HC 的加氢活性组分和裂解组分。同时,根据石蜡转化规律构建了石蜡转化动力学模型。研究结果表明,H2 压力的影响相对复杂。随着氢气压力的变化,加氢裂化反应的程度可能同时受到氢气供应能力和氢质子浓度的影响。三种烃类在 USY 分子筛上的转化优先级如下:芳烃 ≫ 环烷 > 石蜡。SRGO 中的芳烃含量会影响其在 Hydro-D 中的石蜡保留率。与芳烃含量低的 SRGO 加氢处理相比,芳烃含量相对较高的 SRGO 加氢处理后,其石蜡保留率较高,石蜡损失也相对较少。根据构建的模型,SRGO-BJ 在加氢-D 中的转化率和石蜡保留率的计算值分别在 ±10 % 和 ±5 % 的误差范围内。因此,模型原理图是合理的,可为相关模型研究提供建模参考。
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引用次数: 0
Degradation of solid oxide fuel cell anodes by the deposition of potassium compounds 钾化合物沉积对固体氧化物燃料电池阳极的降解作用
IF 6 3区 环境科学与生态学 Q2 ENERGY & FUELS Pub Date : 2024-04-02 DOI: 10.1016/j.crcon.2024.100238
Hui Zhang , Ryo Yoshiie , Ichiro Naruse , Yasuaki Ueki

Alkali contents with low melting points in the ash of woody biomass vaporize during the biomass gasification process, damaging various downstream energy conversion devices, such as the solid oxide fuel cells (SOFCs). In this study, the degradation of SOFC anodes by the deposition of potassium compounds (KCl, K2CO3, and KOH) was investigated. An aqueous solution of potassium compounds was dripped onto the anode surface of the SOFC button cell at room temperature. After drying at 343 K, 6.964 × 10-6 mol KCl, 6.964 × 10-6 mol KOH, and 3.482 × 10-6 mol K2CO3 was deposited on the anode. Button cells with the deposition of K compounds were employed for power generation experiments at 1023 K with the supply of artificial syngas from biomass gasification. After the power generation experiments, the surface structures of the anodes were microscopically analyzed using the SEM and EDS. As a result, K compounds hardly affected the OCV of SOFC. With the addition of KCl, no apparent change in the anode structure was observed, and only a slight KCl deposit was detected. However, chloride tends to be chemisorbed on Ni, increasing the ohmic resistance as well as the adsorption/desorption resistance. However, KOH transformed to K2CO3 and then remained massively on the anode, which was clearly observed in the SEM images. K2CO3 significantly decreased the cell voltage under a current density of 100 mA·cm−2. Through impedance analyses, this voltage drop was mainly attributed to the ohmic resistance and gas diffusion resistance. However, there is no evidence that this deposit degrades Ni particles.

在生物质气化过程中,木质生物质灰烬中熔点较低的碱成分会蒸发,从而损坏各种下游能源转换设备,如固体氧化物燃料电池(SOFC)。本研究调查了钾化合物(KCl、K2CO3 和 KOH)沉积对 SOFC 阳极的降解作用。在室温下,将钾化合物水溶液滴入 SOFC 扣式电池的阳极表面。在 343 K 下干燥后,阳极上沉积了 6.964 × 10-6 mol KCl、6.964 × 10-6 mol KOH 和 3.482 × 10-6 mol K2CO3。使用沉积了 K 化合物的扣式电池在 1023 K 的温度下进行发电实验,并提供生物质气化产生的人工合成气。发电实验结束后,使用 SEM 和 EDS 对阳极的表面结构进行了显微分析。结果表明,钾化合物对 SOFC 的 OCV 几乎没有影响。加入氯化钾后,阳极结构没有发生明显变化,只检测到轻微的氯化钾沉积物。然而,氯化物往往会在镍上发生化学吸附,从而增加欧姆电阻以及吸附/解吸电阻。然而,KOH 转化为 K2CO3 后大量残留在阳极上,这在扫描电镜图像中可以清楚地观察到。在 100 mA-cm-2 的电流密度下,K2CO3 明显降低了电池电压。通过阻抗分析,电压下降主要归因于欧姆电阻和气体扩散阻力。不过,没有证据表明这种沉积物会使镍颗粒降解。
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引用次数: 0
Biogas upgrading towards acetic acid production using Clostridium thailandense supplemented with granular activated carbon (GAC) and L-arginine: A genomic analysis approach 使用添加了颗粒活性炭(GAC)和 L-精氨酸的泰国梭菌进行沼气升级以生产醋酸:基因组分析方法
IF 6 3区 环境科学与生态学 Q2 ENERGY & FUELS Pub Date : 2024-03-12 DOI: 10.1016/j.crcon.2024.100236
Srisuda Chaikitkaew , Nantharat Wongfaed , Chonticha Mamimin , Sompong O-Thong , Alissara Reungsang

This study explores the impact of granular activated carbon (GAC) and L-arginine supplementation on biogas upgrading and acetic acid production employing Clostridium thailandense. GAC and L-arginine concentrations ranged from 0 to 20 g/L and 0 to 5 g/L, respectively, with H2 acting as the electron donor at an H2 to CO2 ratio of 2:1 (v/v). Experiments were conducted at 30 °C with an agitation speed of 150 rpm. Additionally, gene annotation of the C. thailandense genome using Rapid Annotations using Subsystems Technology (RAST) identified genes involved in CO2 to acetic acid conversion. Results indicate that adding 7.5 g/L GAC boosts CH4 purity in biogas, elevating CO2 and H2 consumption efficiencies to 88.3 % and 98.7 %, respectively. This enhancement leads to a CH4 content increase to 93.3 %, accompanied by 0.90 g/L acetic acid production. Conversely, L-arginine demonstrates no significant impact on CO2 conversion. Leveraging RAST, the study identifies hydrogenase genes and NADH-dependent ferredoxin-NADP+ oxidoreductase (Nfn), as crucial for heightened H2 consumption efficiencies and cell growth facilitated by GAC, thus enhancing biogas upgrading efficiency in C. thailandense. This research provides vital insights into optimizing sustainable biogas production through strategic GAC utilization and elucidates the roles of hydrogenase genes and Nfn.

本研究探讨了颗粒活性炭(GAC)和 L-精氨酸的补充对泰国梭菌的沼气升级和醋酸生产的影响。GAC 和 L-精氨酸的浓度分别为 0 至 20 g/L 和 0 至 5 g/L,H2 作为电子供体,H2 与 CO2 的比例为 2:1(v/v)。实验温度为 30 °C,搅拌速度为 150 rpm。此外,利用子系统快速注释技术(RAST)对泰兰菌基因组进行了基因注释,确定了参与二氧化碳转化为醋酸的基因。结果表明,添加 7.5 克/升 GAC 可提高沼气中 CH4 的纯度,将 CO2 和 H2 的消耗效率分别提高到 88.3 % 和 98.7 %。这种提高导致 CH4 含量增加到 93.3%,同时醋酸产量为 0.90 克/升。相反,L-精氨酸对二氧化碳转化没有显著影响。利用 RAST,该研究确定了氢酶基因和 NADH 依赖性铁氧还蛋白-NADP+氧化还原酶(Nfn),它们对提高 H2 消耗效率和 GAC 促进细胞生长至关重要,从而提高了泰国鹅膏菌的沼气升级效率。这项研究为通过战略性利用 GAC 优化可持续沼气生产提供了重要见解,并阐明了氢酶基因和 Nfn 的作用。
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引用次数: 0
Microstructures, Optical, magnetic Properties, and photocatalytic activity of magnetically separable and reusable ZnO-Doped Fe3O4/rGO nanocomposite synthesized via green route 通过绿色路线合成的磁性可分离、可重复使用的掺杂 ZnO 的 Fe3O4/rGO 纳米复合材料的微观结构、光学、磁学特性和光催化活性
IF 6 3区 环境科学与生态学 Q2 ENERGY & FUELS Pub Date : 2024-03-05 DOI: 10.1016/j.crcon.2024.100235
Hasniah Aliah , Nugraheni Puspita Rini , Irfan Syafar Farouk , Zurnansyah , Larrisa Jestha Mahardhika , Putri Dwi Jayanti , Hafil Perdana Kusumah , Rivaldo Marsel Tumbelaka , Nurul Imani Istiqomah , Nining Sumawati Asri , Ryan Nur Iman , Edi Suharyadi

We report magnetically-separable, reusable, green-synthesized Fe3O4/rGO/ZnO, as heterogeneous catalyst for photo-Fenton degradation of organic pollutants in aqueous solution under certain treatments. Fe3O4 nanoparticles was green-synthesized using Moringa oleifera leaf extract, while rGO was synthesized utilizing Amaranthus viridis leaf extract. Fe3O4/rGO was composited under sonication treatment. Afterwards, Fe3O4/rGO was doped with ZnO with various concentration of ZnO. X-ray diffraction and selected area electron diffraction showed that Fe3O4 and ZnO had spinel cubic and hexagonal structure, respectively; another phase appeared as Fe2O3 spinel cubic structure. Crystallite size was decreased as the ZnO concentration increased. Morphology image showed almost spherical, non-uniform, and slightly dispersed particle under agglomerated condition, attaching to rGO sheets. The particle size of Fe3O4, Fe3O4/rGO, and Fe3O4/rGO/ZnO is 14.3; 14.1; and 10.4 nm, respectively. Fourier-transform infrared spectra showed metallic functional groups, such as Fe-O and Zn–O at 562–589 and 462–478 cm−1 also suggests nanocomposite formation. However, blue-shift absorption and band gap widening were observed with ZnO addition. Raman spectroscopy revealed the formation as-synthesized GO and rGO. Vibrating sample magnetometer showed that green-synthesized Fe3O4/rGO/ZnO exhibited superparamagnetic properties. Removal efficiency of photodegradation methylene blue was optimal for green-synthesized Fe3O4/rGO/ZnO under sonication treatment, reached 100 % degradation within 180 min for uptake every 30 min. Photodegradation was also analyzed using Langmuir-Hinshelwood kinetic model, resulting rate constant of 24.7 × 10−3 min−1 and half-life time of 28.1 min at optimum treatment. Reusability of photocatalytic activity after 3 cycles showed only a tiny drop in catalytic efficiency. Meanwhile, it possesses high stability in catalytic activity and structure. The green-synthesized Fe3O4/rGO/ZnO potential as an environmentally friendly reusable photocatalyst for wastewater degradation.

我们报告了磁性可分离、可重复使用、绿色合成的 Fe3O4/rGO/ZnO 作为异相催化剂,在特定处理条件下对水溶液中的有机污染物进行光-芬顿降解。Fe3O4 纳米粒子是利用油辣木叶提取物绿色合成的,而 rGO 则是利用马齿苋叶提取物合成的。Fe3O4/rGO 在超声处理下复合。然后,在 Fe3O4/rGO 中掺入不同浓度的氧化锌。X 射线衍射和选区电子衍射显示,Fe3O4 和 ZnO 分别具有尖晶石立方和六方结构;另一种相为 Fe2O3 尖晶石立方结构。随着氧化锌浓度的增加,晶体尺寸减小。形态学图像显示,颗粒几乎呈球形,不均匀,在团聚状态下略微分散,附着在 rGO 片上。Fe3O4、Fe3O4/rGO 和 Fe3O4/rGO/ZnO 的粒径分别为 14.3、14.1 和 10.4 nm。傅立叶变换红外光谱在 562-589 和 462-478 cm-1 处显示出 Fe-O 和 Zn-O 等金属官能团,这也表明形成了纳米复合材料。然而,加入氧化锌后,观察到蓝移吸收和带隙变宽。拉曼光谱显示形成了合成的 GO 和 rGO。振动样品磁力计显示,绿色合成的 Fe3O4/rGO/ZnO 具有超顺磁性。在超声处理下,绿色合成的 Fe3O4/rGO/ZnO 对亚甲基蓝的光降解去除率最佳,每 30 分钟吸收一次,180 分钟内降解率达到 100%。还利用 Langmuir-Hinshelwood 动力学模型分析了光降解情况,结果表明在最佳处理条件下,光降解速率常数为 24.7 × 10-3 min-1,半衰期为 28.1 min。光催化活性经过 3 个周期后,催化效率仅略有下降。同时,它的催化活性和结构具有很高的稳定性。绿色合成的 Fe3O4/rGO/ZnO 有潜力成为一种可重复使用的环保型光催化剂,用于废水降解。
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引用次数: 0
A multienzyme system immobilized on surface-modified metal–organic framework for enhanced CO2 hydrogenation 固定在表面改性金属有机框架上的多酶系统用于提高二氧化碳氢化效果
IF 6 3区 环境科学与生态学 Q2 ENERGY & FUELS Pub Date : 2024-03-02 DOI: 10.1016/j.crcon.2024.100234
Shadeera Rouf , Yaser E. Greish , Bart Van der Bruggen , Sulaiman Al-Zuhair

Hydrogenating carbon dioxide to formate using formate dehydrogenase (FDH) is a sustainable approach for CO2 mitigation. Herein, we developed a biocatalytic system with cofactor regeneration by immobilizing multiple enzymes, namely FDH, carbonic anhydrase (CA), and glutamate dehydrogenase (GDH), on a hydrophobic surface modified MOF, SA-HKUST-1. The adsorption kinetics of the multiple enzymes on the SA-HKUST-1 surface were described using pseudo second-order model, while the equilibrium followed Freundlich isotherm. Formate production by the enzymes immobilized on SA-HKUST-1 was 3.75 times higher than that achieved by free enzymes and 8.4 times higher than that of FDH immobilized alone on SA-HKUST-1. The hydrophobic interaction between the enzymes and the support altered the secondary structure of enzymes, and the immobilized enzymes retained 94% of their activity after four reuse cycles. This study provides novel insights into the combined effect of hydrophobic support and multiple enzymes on the catalytic efficiency and stability of FDH. These findings can provide a basis for developing a highly stable biocatalytic system with cofactor regeneration for continuous hydrogenation of CO2 to formate at the industrial level.

利用甲酸脱氢酶(FDH)将二氧化碳氢化为甲酸盐是一种可持续的二氧化碳减排方法。在此,我们将多种酶,即甲酸脱氢酶(FDH)、碳酸酐酶(CA)和谷氨酸脱氢酶(GDH)固定在疏水表面修饰的 MOF(SA-HKUST-1)上,开发了一种具有辅助因子再生功能的生物催化系统。多种酶在 SA-HKUST-1 表面的吸附动力学采用伪二阶模型进行描述,而平衡则遵循 Freundlich 等温线。固定在 SA-HKUST-1 上的酶的甲酸生产量是游离酶的 3.75 倍,是单独固定在 SA-HKUST-1 上的 FDH 的 8.4 倍。酶与支持物之间的疏水相互作用改变了酶的二级结构,固定化酶在四个重复使用周期后保留了 94% 的活性。这项研究为疏水支持物和多种酶对 FDH 催化效率和稳定性的共同影响提供了新的见解。这些发现为开发具有辅助因子再生功能的高稳定性生物催化系统提供了基础,该系统可用于在工业水平上将二氧化碳连续氢化为甲酸酯。
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引用次数: 0
Thank you reviewers! 谢谢各位审稿人!
IF 6 3区 环境科学与生态学 Q2 ENERGY & FUELS Pub Date : 2024-03-01 DOI: 10.1016/j.crcon.2024.100233
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引用次数: 0
Outside Back Cover 封底外侧
IF 6 3区 环境科学与生态学 Q2 ENERGY & FUELS Pub Date : 2024-03-01 DOI: 10.1016/S2588-9133(24)00010-3
{"title":"Outside Back Cover","authors":"","doi":"10.1016/S2588-9133(24)00010-3","DOIUrl":"https://doi.org/10.1016/S2588-9133(24)00010-3","url":null,"abstract":"","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"7 1","pages":"Article 100221"},"PeriodicalIF":6.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588913324000103/pdfft?md5=86f4c6daaf01633d06143e8b5621313c&pid=1-s2.0-S2588913324000103-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140640907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Carbon Resources Conversion
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