Carbon Resources Conversion最新文献_第3页

Synergistic effects of trace metals on hydrogen and methane production from palm oil mill effluent using two-stage anaerobic digestion 微量金属对两级厌氧消化棕榈油厂废水产氢和甲烷的协同效应

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-02-13 DOI: 10.1016/j.crcon.2025.100309

Wisarut Tukanghan , Jiravut Seengenyoung , Supattra In-chan , Chonticha Mamimin , Sukonlarat Chanthong , Sompong O-Thong

The two-stage anaerobic digestion of palm oil mill effluent (POME) was optimized through trace metal supplementation (Mo²⁺, Ni²⁺, Co²⁺, and Fe²⁺). Optimal concentrations were determined as 10 mg·L⁻¹ Mo²⁺, 6 mg·L⁻¹ Ni²⁺, 6 mg·L⁻¹ Co²⁺, and 10 mg·L⁻¹ Fe²⁺, resulting in significant biogas yield improvements on hydrogen yield increased by 86.4 % (29.5 ± 0.9 to 55.0 ± 2.1 mL-H₂·g⁻¹-VS) and methane yield by 84 % (from 173.8 ± 7.8 to 320.0 ± 8.4 mL-CH₄·g⁻¹-VS). Gas composition improved, with H₂ content increasing from 18.5 % to 32.0 % and CH₄ content from 58.2 % to 72.5 %. Maximum process efficiency was achieved at 4-day HRT for hydrogen production and 20-day HRT for methanogenesis with metal removal 0f 93.5–94.8 %. Statistical analysis revealed strong correlations between metal concentrations and enzyme activities (R² = 0.94, p < 0.001) and enzyme activities with biogas yields (R² = 0.92, p < 0.001). Metabolite profiles showed an 81 % increase in acetic acid (3,800 ± 120 mg·L⁻¹) and a 93 % increase in butyric acid (2,900 ± 95 mg·L⁻¹), while propionic acid decreased by 57 % in H₂ stage. Thermoanaerobacterium thermosaccharolyticum was dominant in the H₂ stage, while Methanobacter sp. and Methanosarcina sp. dominated in the CH₄ stage, with their abundance influenced by specific trace metal supplementation. Process stability was maintained through precise control systems (temperature stability index of 0.95 ± 0.05 and pH stability index of 0.92 ± 0.05) with rapid response times (<5 min). COD removal efficiency increased from 65.3 % to 85.2 %, while metal removal efficiencies exceeded 90 % for all supplemented metals. These findings demonstrate significant enhancement in biogas production through optimized trace metal supplementation and precise process control strategies.

通过添加微量金属（Mo2+、Ni2+、Co2+和Fe2+），优化了棕榈油厂废水的两级厌氧消化（POME）。最佳浓度为10 mg·L−1 Mo2+、6 mg·L−1 Ni2+、6 mg·L−1 Co2+和10 mg·L−1 Fe2+，可显著提高沼气产率，氢气产率提高86.4%(29.5±0.9 ~ 55.0±2.1 mL-H2·g−1 vs)，甲烷产率提高84%（173.8±7.8 ~ 320.0±8.4 mL-CH4·g−1 vs）。气体成分得到改善，H2含量从18.5%增加到32.0%，CH4含量从58.2%增加到72.5%。在4天的HRT制氢和20天的HRT产甲烷时，工艺效率最高，金属去除率为93.5 - 94.8%。统计分析表明，金属浓度与酶活性之间存在较强的相关性(R2 = 0.94, p <；0.001)和酶活性与沼气产量的关系(R2 = 0.92, p <；0.001)。代谢物谱显示，H2期乙酸增加81%(3800±120 mg·L−1)，丁酸增加93%(2900±95 mg·L−1)，丙酸减少57%。H2阶段以热厌氧菌为主，CH4阶段以甲烷杆菌（Methanobacter sp.）和甲烷菌（Methanosarcina sp.）为主，其丰度受添加微量金属的影响。通过精确的控制系统（温度稳定指数为0.95±0.05，pH稳定指数为0.92±0.05），快速响应时间（<5 min），保持过程稳定性。COD去除率由65.3%提高到85.2%，金属去除率均超过90%。这些发现表明，通过优化微量金属补充和精确的过程控制策略，可以显著提高沼气产量。

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引用次数: 0

The impact of radio–green light interaction on hydrogen evolution reaction inhibition of carbon based electrophotocatalyst 无线电-绿光相互作用对碳基光电催化剂析氢反应抑制的影响

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-02-12 DOI: 10.1016/j.crcon.2025.100308

Purnami Purnami , Willy Satrio Nugroho , I.N.G. Wardana , Avita Ayu Permanasari , Sukarni Sukarni , Indra Mamad Gandidi , Tuan Amran Tuan Abdullah , Anwar Johari

This study investigates the effects of radio wave frequencies (470 MHz, 670 MHz, and 870 MHz) on hydrogen evolution reaction (HER) during water electrolysis using activated charcoal as an electrophotocatalyst. The results reveal that a frequency of 870 MHz produced the highest hydrogen concentration (7775 ppm), followed by 670 MHz (7016 ppm), and 470 MHz (4219 ppm). In contrast, electrolysis without radio frequency application resulted in 8271 ppm of hydrogen suggests the interaction between radio and light interaction inhibits hydrogen production. FTIR analysis identified multiple functional groups on the activated charcoal surface, including OH, C=O, and C-Cl, which influence the material’s interaction with electromagnetic fields. SEM and EDS characterizations revealed a hierarchical porous microstructure with elemental inclusions such as Si, Al, and Cl that contribute to surface polarization. This study proposes that surface plasmon resonance (SPR) is induced by metal impurities on the activated chcarcoal surface, enhancing the local electric field and improving HER. The complex interaction of functional groups, elemental composition, and radio waves offers insights into optimizing activated charcoal for improved HER efficiency.

研究了无线电波频率（470 MHz、670 MHz和870 MHz）对活性炭电解过程中析氢反应（HER）的影响。结果显示，870 MHz频率产生的氢浓度最高（7775 ppm），其次是670 MHz （7016 ppm）和470 MHz （4219 ppm）。相比之下，没有射频应用的电解产生8271 ppm的氢，表明无线电和光相互作用之间的相互作用抑制了氢的产生。FTIR分析发现，活性炭表面存在OH、C=O、C- cl等多个影响材料与电磁场相互作用的官能团。扫描电镜和能谱分析表明，硅、铝和氯等元素夹杂物有助于表面极化。本研究提出活性炭表面金属杂质诱导表面等离子体共振（SPR），增强局部电场，提高HER。官能团、元素组成和无线电波的复杂相互作用为优化活性炭以提高HER效率提供了见解。

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引用次数: 0

Mechanism of pore formation in copper slag reduction: A clarification combining experiments and simulation 铜渣还原过程中孔隙形成机理：实验与模拟相结合的澄清

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-02-11 DOI: 10.1016/j.crcon.2025.100307

Bo Tong , Liu Yan , Jingzhong Xu , Kun Wang , Ting-an Zhang

Copper slag still contains a large amount of iron resources after flotation, and direct storage is a serious waste of resources. Direct Reduced Iron(DRI) are prepared by reduction of copper slag which requires a large amount of fossil energy and emits carbon largely. In this work, straw and straw charcoal were used as reducing agents to reduce flotation copper slag to prepare DRI. The pore model of the DRI was constructed via micro/nano stimulation, and the direct reduction kinetic characteristics of the biomass copper slag composite pellets were analyzed. The results show that the addition of straw is beneficial for the direct reduction of copper slag. The straw is pyrolyzed to produce a reducing pyrolysis gas to prereduce the pellets while leaving pores to improve the kinetic conditions for the subsequent direct reduction of copper slag. Compared with traditional fossil fuels such as anthracite, the metallization rate of DRI prepared with straw and straw charcoal as reducing agents to reduce copper slag increased from 85 % to 96.54 %. This process can reduce carbon emissions by 0.26 ∼ 0.52 t per ton of molten iron. This study proposes a feasible, low-carbon and efficient flotation copper slag treatment method that can fully recover the iron resources in flotation copper slag and solve the industry problem that flotation copper slag can be stored and disposed of only. It is helpful to promote the organic combination of nonblast furnace ironmaking, the comprehensive utilization of copper slag and the comprehensive utilization of biomass resources.

铜渣浮选后仍含有大量的铁资源，直接贮存是一种严重的资源浪费。直接还原铁（Direct reducing Iron， DRI）是由铜渣还原而成，需要大量的化石能源，碳排放量大。以秸秆和秸秆炭为还原剂，对浮选铜渣进行还原制备DRI。采用微纳刺激法建立了DRI孔隙模型，分析了生物质铜渣复合球团的直接还原动力学特性。结果表明，秸秆的加入有利于铜渣的直接还原。秸秆热解产生还原性热解气，预还原球团，同时留下气孔，为后续直接还原铜渣改善动力学条件。与无烟煤等传统化石燃料相比，以秸秆和秸秆炭为还原剂制备的DRI还原铜渣的金属化率由85%提高到96.54%。该工艺每生产1吨铁水可减少0.26 ~ 0.52吨碳排放。本研究提出了一种可行、低碳、高效的浮选铜渣处理方法，可以充分回收浮选铜渣中的铁资源，解决了浮选铜渣只能贮存处理的行业难题。有利于促进非高炉炼铁、铜渣综合利用和生物质资源综合利用的有机结合。

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引用次数: 0

Isotope-tagging atmosphere to characterize carbonate ore decomposition reaction in carbon dioxide 碳酸盐岩矿石在二氧化碳中分解反应的同位素标记气氛表征

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-02-11 DOI: 10.1016/j.crcon.2025.100306

Xuejing Liu , Jiaqi Xie , Xiyan Li , Shuai Xu , Hong Zhang , Xin Jia , Guangwen Xu

This study utilizes a combination of micro fluidized bed analysis technology and isotope-tagging methodology to investigate the decomposition of carbonate ores in CO₂ atmospheres. Utilizing the decomposition of magnesite in an atmosphere containing ¹³CO₂ as a case study, the reaction behavior and kinetics were investigated using a micro fluidized bed reaction analyzer (MFBRA). The results reveal that ¹³CO₂ in the atmosphere hinders the decomposition process, thereby increasing the time required for complete decomposition. The activation energy was observed to increase with the concentration of ¹³CO₂ in the reaction atmosphere. Compared to the results obtained from thermogravimetric analysis (TG), the activation energy and pre-exponential factor values determined by the MFBRA are lower. Due to the excessive suppression caused by the accumulation of product gas within the sample crucible, the apparent activation energy calculated based on TG data was overestimated, particularly in atmospheres containing the product gas CO₂. The MFBRA, operating in an environment characterized by essentially eliminated external gas diffusion, extensive gas–solid mixing, and high rates of mass and heat transfer, has proven to be highly capable of accurately determining the kinetics of carbonate ore decomposition in CO₂-rich atmospheres. This study provides a straightforward and reliable method for elucidating the reaction characteristics and kinetics of carbonate ore decomposition in atmosphere of CO₂.

本研究将微流化床分析技术与同位素标记方法相结合，对碳酸盐岩矿石在CO2大气中的分解进行了研究。以菱镁矿在13CO2气氛下的分解为例，利用微流化床反应分析仪（MFBRA）研究了菱镁矿的反应行为和动力学。结果表明，大气中的13CO2阻碍了分解过程，从而增加了完全分解所需的时间。反应气氛中13CO2浓度越大，反应活化能越高。与热重分析（TG）结果相比，MFBRA测定的活化能和指前因子值较低。由于产物气体在试样坩埚内的积累造成了过度抑制，基于热重数据计算的表观活化能被高估了，特别是在含有产物气体CO2的气氛中。MFBRA在基本消除外部气体扩散、广泛的气固混合、高质量和热传递率的环境中工作，已被证明能够准确测定富二氧化碳大气中碳酸盐矿石分解动力学。本研究为阐明碳酸盐岩矿石在CO2气氛中的分解反应特征和动力学提供了一种简单可靠的方法。

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引用次数: 0

One step preparation of papyrus culm derived activated biochar using partial air oxidation and its use as a filter for water treatment in aquaponics culture 部分空气氧化法一步制备纸莎草草衍生的活性生物炭及其在水培培养中作为水处理过滤器的应用

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-01-28 DOI: 10.1016/j.crcon.2025.100305

Sumrit Mopoung, Suthasinee Pantho

Papyrus culm derived activated biochars were prepared through carbonization and air oxidation at 400–600 °C. The activated biochars were analyzed by SEM-EDS, FT-IR, Raman, BET, and XRD techniques. The best product was collected for use as filter material in aquaponics. It was found that the activated biochars have diverse properties with high disorder of graphitic, oxygenated functional groups (OH, C=O, C-O, and Si-O), oxide compounds (CaO, MgO, Na₂O, K₂O, SiO₂), and relatively high specific surface area and micropore volume. These parameters increased with increasing carbonization temperature from 400 °C to 600 °C. For materials produced at 600 °C the pore size of the derived activated biochar falls in the range of micropores (<2 nm), with a small mesopore and macropore content. This product has BET specific surface area of 270.27 m²/g. Utilizing the derived activated biochar prepared with carbonization at 600 °C for aquaponics culture has shown that the values of total NH₃, NO₂^–, NO₃^–, PO₄^3-, and turbidity decreased, while the DO content increased in the water of the aquaponics culture with efficiency percentage values of 33.33–35.90 %, 4.93–13.43 %, 9.15–12.90 %, 34.97–43.04 %, 10.23–23.90 %, and 16.86–23.90 %, respectively, throughout the four weeks of the experiment. This was achieved via electrostatic attraction, exchangeable cation and anion attraction, and filtration. Furthermore, the activated biochar could also maintain the water pH in a relatively alkaline range for the duration of the experiment, which is suitable for cultivating tilapia and growing red oak lettuce. However, the activated biochar filter began to reach sorption saturation during the third week of the experiment. Therefore, the activated biochar filter should be replaced with a new one after four weeks of use. This research has shown that activated biochar from papyrus culm can be a candidate for an adsorbent material with a simple, cost-effective, and timesaving production.

通过400 ~ 600℃的炭化和空气氧化法制备了纸莎草草源活性生物炭。采用SEM-EDS、FT-IR、Raman、BET、XRD等技术对活性炭进行分析。收集最佳产物作为水培工艺的滤料。结果表明，活性炭具有石墨、氧合官能团（OH、C=O、C-O和Si-O）、氧化物（CaO、MgO、Na2O、K2O、SiO2）的高度无序性，具有较高的比表面积和微孔体积。这些参数随着炭化温度从400℃升高到600℃而增加。在600℃下制备的活性生物炭的孔径在微孔（2nm）范围内，中孔和大孔含量较少。本品BET比表面积为270.27 m2/g。利用600℃炭化制备的衍生活性生物炭进行水培培养，结果表明，在4周的实验过程中，水培培养水体中总NH3、NO2 -、NO3 -、PO43-和浊度降低，DO含量增加，效率百分比分别为33.33 - 35.90%、4.93 - 13.43%、9.15 - 12.90%、34.97 - 43.04%、10.23 - 23.90%和16.86 - 23.90%。这是通过静电吸引、可交换的阳离子和阴离子吸引和过滤来实现的。此外，活性炭还能在试验期间将水体pH维持在一个相对碱性的范围内，适合养殖罗非鱼和种植红橡树生菜。然而，活性生物炭过滤器在实验的第三周开始达到吸附饱和。因此，活性生物炭过滤器应在使用四周后更换新的。本研究表明，从纸莎草秆中提取的活性生物炭可以作为一种简单、经济、省时的吸附材料。

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引用次数: 0

Improved performance of a direct methanol fuel cell by the highly-developed mesopores of the carbon nanofibers catalyst support 高度发达的中孔碳纳米纤维催化剂载体提高了直接甲醇燃料电池的性能

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-01-25 DOI: 10.1016/j.crcon.2025.100304

He Gao , Hirokazu Ishitobi , Nobuyoshi Nakagawa

A prepared carbon nanofibers with mesopores (P-CNFs) by electrospinning utilizing polystyrene (PS) and polyacrylonitrile (PAN) as the pore-forming agent and carbon matrix, respectively, to obtain a thinner catalyst layer which has an enhanced reaction activity for use in a direct methanol fuel cell (DMFC). A PS to PAN mass ratio of 1.00 yielded the highest mesopore volume with an average pore radius of 4.7 nm. PtRu and TiO₂ nanoparticles were coated on the P-CNFs, producing PtRu/P-TCCNFs, and used in a DMFC. The electrochemically active surface area (ECSA) of the PtRu/P-TCCNFs significantly surpassed that of the nonporous carbon nanofibers (PtRu/TCCNFs) and was nearly twice that of the commercially available catalyst, PtRu/C. The improvement of the ECSA value is mainly due to the increased surface area in the mesopore region that facilitates the catalyst nanoparticle dispersion thus preventing agglomeration. Consequently, the methanol oxidation reaction (MOR) mass activity of PtRu(32)/P-TCCNFs reached 438 mA/mg_-PtRu, exceeding that of PtRu(32)/TCCNFs and PtRu/C by 1.27 and 4.56 times, respectively. Furthermore, PtRu(32)/P-TCCNFs demonstrated a superior DMFC performance attributed to the thinner catalyst layer with the increased reaction site density and the reduced ohmic resistance, thus yielding a higher maximum power density.

以聚苯乙烯（PS）和聚丙烯腈（PAN）分别为成孔剂和碳基体，采用静电纺丝法制备了具有介孔的碳纳米纤维（P-CNFs），得到了更薄、反应活性更高的催化剂层，可用于直接甲醇燃料电池（DMFC）。PS与PAN的质量比为1.00时，介孔体积最大，平均孔径半径为4.7 nm。将PtRu和TiO2纳米颗粒包被在P-CNFs上，生成PtRu/ p - tccfs，并用于DMFC。PtRu/P-TCCNFs的电化学活性表面积（ECSA）大大超过了无孔碳纳米纤维（PtRu/TCCNFs），几乎是市售催化剂PtRu/C的两倍。ECSA值的提高主要是由于中孔区表面积的增加，有利于催化剂纳米颗粒的分散，从而防止团聚。因此，PtRu(32)/P-TCCNFs的甲醇氧化反应（MOR）质量活性达到438 mA/mg-PtRu，分别是PtRu(32)/TCCNFs和PtRu/C的1.27和4.56倍。此外，PtRu(32)/P-TCCNFs表现出优越的DMFC性能，这是由于催化剂层更薄，反应位点密度增加，欧姆电阻降低，从而产生更高的最大功率密度。

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引用次数: 0

Enhancing ethanol dehydration through optimized WO3 loading on activated carbon and montmorillonite clay catalysts 通过优化活性炭和蒙脱土催化剂负载WO3来增强乙醇脱水

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-01-15 DOI: 10.1016/j.crcon.2025.100303

Chaowat Autthanit , Sasiradee Jantasee , Jirayu Liewchalermwong , Narathip Thubthun , Supachai Jadsadajerm , Piyasan Praserthdam , Bunjerd Jongsomjit

The objective of this study is to investigate the utilization of tungsten oxide (WO₃) supported on natural materials, including activated carbon (AC) and montmorillonite clay (MMT), for the catalytic dehydration of ethanol. This study addresses the growing demand for sustainable chemical processes that produce key intermediates, such as ethylene and diethyl ether, from renewable resources. The research examined the effect of varying WO₃ loadings on catalyst performance using the incipient wetness impregnation method. The physicochemical properties of catalysts were elucidated through a variety of characterization techniques. The results revealed that MMT supports exhibited a more significant enhancement in catalytic efficiency compared to AC when loaded with W. This superior performance is attributed to MMT’s unique layered structure, enabling efficient dispersion of tungsten species and optimized acid site distribution. The structural properties of the support and the higher density of weak acid sites were found to significantly influence catalytic activity. The 13.5WMMT catalyst demonstrated remarkable dual functionality, achieving 42.63 % diethyl ether yield at 250 °C and 96.73 % ethylene yield at 400 °C. In contrast, the 13.5WAC catalyst produced only 22.30 % diethyl ether yield at 300 °C and 77.02 % ethylene yield at 400 °C. The study not only underscores the significance of metal loading and support type in achieving superior catalytic performance, but also highlights the exceptional potential of MMT as a promising candidate for sustainable and efficient ethanol dehydration processes.

本研究的目的是研究负载氧化钨（WO3）的天然材料，包括活性炭（AC）和蒙脱土（MMT），用于催化脱水乙醇。这项研究解决了对可再生资源生产关键中间体（如乙烯和乙醚）的可持续化学过程日益增长的需求。本研究采用初湿浸渍法考察了不同WO3负载对催化剂性能的影响。通过多种表征技术对催化剂的理化性质进行了表征。结果表明，当负载w时，MMT载体的催化效率比AC有更显著的提高。这种优越的性能归因于MMT独特的层状结构，可以有效地分散钨种并优化酸位分布。研究发现，载体的结构特性和较高的弱酸位点密度对催化活性有显著影响。135 wmmt催化剂表现出显著的双功能，在250℃时乙醚收率为42.63%，在400℃时乙烯收率为96.73%。相比之下，13.5WAC催化剂在300℃时乙醚收率仅为22.30%，在400℃时乙烯收率仅为77.02%。该研究不仅强调了金属负载和载体类型对实现卓越催化性能的重要性，而且强调了MMT作为可持续和高效乙醇脱水工艺的有希望的候选物的特殊潜力。

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引用次数: 0

Mesoporous carbon derived from lignin sulfonate as a sustainable cathode for high-performance aluminium batteries 从木质素磺酸盐中提取的介孔碳作为高性能铝电池的可持续阴极

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-01-03 DOI: 10.1016/j.crcon.2024.100301

Fathima Ali Kayakool , Harita Pant , Menestreau Paul , Glaydson Simões Dos Reis , Gopinathan Manavalan , Vadali Venkata Satya Siva Srikanth , Mikael Thyrel , Shaikshavali Petnikota

The development of sustainable and efficient energy storage systems is crucial for addressing the growing global energy demand. This study investigates the potential of mesoporous carbon derived from lignin sulfonate as a cathode material for aluminium batteries. Lignin sulfonate, a by-product of the paper industry, was used as a precursor to synthesize mesoporous carbon through a facile and eco-friendly activation process. The resulting carbon material exhibited a high specific surface area of ∼ 2259 m²/g and a well-defined balance of micro- and meso- porosity, making it a promising cathode material for high-performance aluminium batteries. Electrochemical characterization showed that the mesoporous carbon cathode delivered an impressive specific capacity of 91 mAh/g at 1.0 A/g current density even after 7000 cycles with excellent cycling stability. It delivered superior rate capabilities of 105, 89, 80, 72, 67, 63, 90, and 105 mAh/g at 0.1, 1.0, 2.0, 3.0, 4.0, 5.0, 1.0, and 0.1 A/g current rates, respectively. The use of lignin-sulfonate as a precursor to prepare mesoporous carbon opens up a new sustainable way for improving the electrochemical performance of carbon-based cathode materials for aluminium batteries.

发展可持续、高效的能源存储系统对于解决日益增长的全球能源需求至关重要。本研究探讨了木质素磺酸盐衍生的介孔碳作为铝电池正极材料的潜力。以造纸工业的副产物木质素磺酸盐为前驱体，通过简单、环保的活化工艺合成介孔碳。所得的碳材料具有高比表面积（~ 2259 m2/g）和良好的微孔和介孔平衡，使其成为高性能铝电池的极具前景的正极材料。电化学表征表明，在1.0 A/g电流密度下，即使在循环7000次后，介孔碳阴极也能提供令人印象深刻的91 mAh/g比容量，并且具有良好的循环稳定性。它在0.1、1.0、2.0、3.0、4.0、5.0、1.0和0.1 A/g电流下分别提供了105、89、80、72、67、63、90和105 mAh/g的卓越性能。以木质素磺酸盐为前驱体制备介孔碳，为提高铝电池碳基正极材料的电化学性能开辟了一条可持续发展的新途径。

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引用次数: 0

Utilization of CO2 and recycling of methanol Residue from the refining process for production of Bio-Methanol 生物甲醇精制过程中二氧化碳的利用和甲醇残渣的回收

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-01-03 DOI: 10.1016/j.crcon.2024.100302

Rujira Jitrwung , Kuntima Krekkeitsakul , Nattawee Teerananont , Parinya Thongyindee , Weerawat Patthaveekongka , Chinnathan Areeprasert

This study explores the synthesis of bio-methanol from biogas, focusing on the optimization of carbon dioxide (CO₂) separation via alternating pressure adsorption and subsequent methanol production using varying methane (CH₄) ratios. Methanol synthesis was conducted under CH₄/CO₂ ratios of 30/70, 50/50, and 70/30, utilizing both pure water and methanol solutions at concentrations of 10 %, 20 %, 30 %, and 40 %. The results demonstrated that increasing the CH₄ ratio led to enhanced CO₂ conversion, with maximum values of 42.59 % and methanol production reaching 3,850 g/day. The study further investigated the refining process of crude methanol, achieving a purity exceeding 99 % through a three-column distillation approach. Notably, the recycling of waste methanol significantly improved both methanol yield and CO₂ consumption, indicating a promising pathway for sustainable bio-methanol production. Overall, this research highlights the potential of integrating biogas utilization with efficient methanol synthesis and refining processes.

本研究探讨了从沼气中合成生物甲醇，重点研究了通过交替压力吸附分离二氧化碳（CO2）和随后使用不同甲烷（CH4）比例生产甲醇的优化。在CH4/CO2比为30/70、50/50和70/30的条件下，分别使用纯水和浓度为10%、20%、30%和40%的甲醇溶液进行甲醇合成。结果表明，增加CH4比可提高CO2转化率，最高可达42.59%，甲醇产量可达3850 g/d。本研究进一步研究了粗甲醇的精制工艺，通过三柱精馏的方法，使粗甲醇的纯度超过99%。值得注意的是，废甲醇的回收利用显著提高了甲醇产量和二氧化碳消耗量，为可持续的生物甲醇生产指明了一条有希望的途径。总的来说，这项研究强调了将沼气利用与高效甲醇合成和精炼工艺相结合的潜力。

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引用次数: 0

Influence of grain size of acidic NiMo/TS-1 on its catalytic performance for hydrodesulfurization of dibenzothiophenes 酸性NiMo/TS-1晶粒尺寸对二苯并噻吩加氢脱硫性能的影响

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2024-12-13 DOI: 10.1016/j.crcon.2024.100299

Yutong Zou , Chengkun Xiao , Xiaoyang Kong , Liang Qiao , Wei Wang , Chunya Wang , Aijun Duan , Chunming Xu , Xilong Wang

TS-1 zeolites with different grain sizes were prepared under hydrothermal conditions by tuning the amount of template agent, chelating agent, and temperature, which were further used as supports for the NiMo/TS-1 catalysts. The optimization of synthesis conditions has achieved controllable synthesis of grain sizes from nano-scale to micron-scale. TS-1 with smaller grain sizes possess larger specific surface area, external specific surface area, and pore volume, which can effectively shorten the diffusion path of the sulfide with complex structure. Nano-scale TS-1 has more highly-coordinated Ti species, acting as electronic additives to increase the sulfidation degree of the catalyst. Nano-scale NiMo/TS-1 exhibits higher acidity, which is beneficial for hydrodesulfurization (HDS) reactions. Among the series of NiMo/TS-1 catalysts, NiMo/TS-1 (120 nm) catalyst exhibits the highest dibenzothiophene (DBT, 88.4 %) and 4,6-dimethylbenzothiophene (4,6-DMDBT, 62.1 %) HDS activities.

通过调节模板剂用量、螯合剂用量和温度，在水热条件下制备了不同粒径的TS-1分子筛，并将其作为载体用于NiMo/TS-1催化剂的制备。通过对合成条件的优化，实现了从纳米级到微米级晶粒尺寸的可控合成。粒径较小的TS-1具有较大的比表面积、外比表面积和孔隙体积，可以有效缩短结构复杂硫化物的扩散路径。纳米级TS-1具有更多高度配位的钛种，作为电子添加剂，提高催化剂的硫化程度。纳米级NiMo/TS-1具有较高的酸性，有利于加氢脱硫（HDS）反应。在NiMo/TS-1系列催化剂中，NiMo/TS-1 （120 nm）催化剂具有最高的二苯并噻吩（DBT, 88.4%）和4,6-二甲基苯并噻吩（4,6- dmdbt, 62.1%） HDS活性。

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引用次数: 0