Carbon Resources Conversion最新文献

Bioconversion of agro-industrial carbon wastes into biodiesel feedstocks with superior fuel properties by promising oleaginous yeasts and cultivation strategies 利用有前途的产油酵母和培养策略将农业工业碳废物转化为具有优越燃料性能的生物柴油原料

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2026-04-01 Epub Date: 2025-06-29 DOI: 10.1016/j.crcon.2025.100354

Amporn Malisorn , Benjamas Cheirsilp , Asma Billateh , Yasmi Louhasakul , Apichat Upaichit

Oleaginous yeasts hold significant potential as biodiesel feedstocks as they accumulate high content of lipids with similar fatty acid profiles to those of plant oils. However, the commercialization of yeast lipids is limited by the high cost of nutrients for yeast cultivation. This study aimed to explore the use of agro-industrial carbon wastes as low-cost nutrients and cultivation strategies for promising oleaginous yeasts. Four oleaginous yeasts were screened for their ability to grow on molasses, crude glycerol, and whey lactose. Among the yeast strains and agro-industrial wastes tested, Candida tropicalis X37 and Rhodotorula mucilaginosa G43 grew best on molasses and produced higher lipids than other strains. Both strains grew better when adding ammonium sulfate as a low-cost nitrogen source, but C. tropicalis X37 produced higher lipids when using only molasses. Through the fed-batch cultivation, C. tropicalis X37 could thrive in high molasses concentration and gave higher biomass and lipids than R. mucilaginosa G43. Scaling up in a bioreactor using an aeration rate of 1.0 air volume per liquid volume per minute further increased the production of biomass and lipids by C. tropicalis X37 up to 15.75 ± 0.42 g/L and 6.55 ± 0.35 g/L, respectively. The analysis of prospective fuel properties confirmed that the yeast lipids are suitable as biodiesel feedstocks. These strategies would contribute greatly to supporting green energy supply, sustainable management of wastes, and environmental protection.

产油酵母具有作为生物柴油原料的巨大潜力，因为它们积累了与植物油相似的脂肪酸谱的高含量脂质。然而，酵母脂的商业化受到酵母培养所需营养物质成本高的限制。本研究旨在探索利用农用工业碳废弃物作为低成本的营养物和培养有前途的产油酵母的策略。筛选了四种产油酵母在糖蜜、粗甘油和乳清乳糖上生长的能力。在酵母菌菌株和农工废弃物中，热带念珠菌X37和粘液红酵母G43在糖蜜上生长最好，脂质产量也高于其他菌株。两株菌株在添加硫酸铵作为低成本氮源时生长较好，但C. tropical alis X37在仅使用糖蜜时产生较高的脂质。通过分批投料培养，热带C. tropicalis X37在高糖蜜浓度条件下茁壮成长，生物量和脂质均高于粘毛r.m ilaginosa G43。在曝气率为1.0风量/液量/分钟的生物反应器中，进一步增加了C. tropical alis X37的生物量和脂质产量，分别达到15.75±0.42 g/L和6.55±0.35 g/L。对酵母脂类燃料性能的分析表明，酵母脂类适合作为生物柴油的原料。这些战略将大大有助于支持绿色能源供应、废物的可持续管理和环境保护。

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引用次数: 0

Propane dehydrogenation over cobalt-based catalysts: Influence of Sn oxidation states upon catalytic stability through the MCM-41 framework 钴基催化剂上丙烷脱氢：通过MCM-41框架Sn氧化态对催化稳定性的影响

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2026-04-01 Epub Date: 2025-08-26 DOI: 10.1016/j.crcon.2025.100372

Mozhdeh Amanati , Mohammad Kazemeini , Seyed Javid Royaee , Saeed Soltanali

The development of cost-effective and environmentally benign catalysts for propane dehydrogenation (PDH) is critical for sustainable propylene production. In this study, cobalt-based catalysts supported on mesoporous MCM-41 were systematically modified via incorporation and impregnation of tin species with distinct oxidation states (Sn(II) and Sn(IV)) to investigate their influence upon catalytic activity and stability. Comprehensive physicochemical characterization, including XRD, BET-BJH, Raman, XPS, H₂-TPR, NH₃-TPD, and DRS, demonstrated that Sn(II) doping significantly enhanced the i) metal dispersion, ii) Co²⁺ stabilization, and iii) mesoporous framework integrity. Amongst the synthesized catalysts, Co/Sn(II)@MCM-41 exhibited the highest Co²⁺/Co³⁺ ratio (of 2.846), optimal acid site distribution, and superior textural properties, correlating with the best catalytic performance (of 18.5 % and 92 % for conversion and propylene selectivity, respectively), and the lowest deactivation rate (k_d = 0.068 h⁻¹) at 580 °C. In contrast, Sn(IV) incorporation results in a lower Co²⁺/Co³⁺ ratio and weaker metal–support interactions, leading to a reduced population of active sites and inferior catalytic performance compared to that of Sn(II). These results highlighted the critical role of the tin oxidation state in tuning surface chemistry and catalyst durability. This work offers valuable insights toward the rational design of robust, non-noble metal catalysts for industrially relevant PDH processes.

开发经济、环保的丙烷脱氢催化剂是实现丙烯可持续生产的关键。在本研究中，通过掺入和浸渍具有不同氧化态的锡（Sn（II）和Sn(IV)），系统地修饰了介孔MCM-41负载的钴基催化剂，研究了它们对催化活性和稳定性的影响。综合理化表征，包括XRD、BET-BJH、Raman、XPS、H2-TPR、NH3-TPD和DRS，表明Sn（II）的掺杂显著增强了i)金属分散性、II) Co2+稳定性和iii)介孔骨架完整性。在所合成的催化剂中，Co/Sn(II)@MCM-41具有最高的Co2+/Co3+比（2.846）、最佳的酸位分布和优异的结构性能，在580℃时具有最佳的催化性能（转化率为18.5%，丙烯选择性为92%）和最低的失活率（kd = 0.068 h−1）。相比之下，Sn（IV）的掺入导致Co2+/Co3+比降低，金属-载体相互作用减弱，导致活性位点数量减少，催化性能不如Sn（II）。这些结果突出了锡氧化态在调整表面化学和催化剂耐久性方面的关键作用。这项工作为合理设计工业相关PDH工艺的坚固，非贵金属催化剂提供了有价值的见解。

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引用次数: 0

Non-thermal enzymatic saccharification of cassava processing byproduct for energy-efficient and optimized maltooligosaccharides production 木薯加工副产物的非热酶法糖化节能及低聚麦芽糖优化生产

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2026-04-01 Epub Date: 2025-07-21 DOI: 10.1016/j.crcon.2025.100359

Hataikarn Lekakarn , Phichaphon Khlaiphayak , Katesuda Aiewviriyasakul , Benjarat Bunterngsook

The valorization of starch-rich materials typically requires high-temperature gelatinization prior to enzymatic saccharification to convert the starch into usable sugars, which are subsequently transformed into biochemical products. To bypass the energy-intensive gelatinization step, effective thermostable enzymes capable of degrading raw starch are essential. In this work, a raw starch-digesting amylolytic enzyme system was produced by a novel isolate, Priestia koreensis HL12 using sago starch as a carbon source at 30 °C for 48 h. The crude enzyme demonstrated thermophilic properties, exhibiting robust amylase activity across a broad temperature range (30–100 °C), with the highest amylase activity (168.05 U/mg protein) at 65 °C in 50 mM sodium phosphate buffer pH 6 toward soluble starch. The enzyme efficiently hydrolyzed both raw and gelatinized starches, predominantly yielding maltooligosaccharides (DP3 and DP5) as valuable prebiotics, without producing glucose. The highest sugar yield was obtained from gelatinized potato starch, with 841.58 mg/g substrate (84 % conversion), while cassava pulp hydrolysis below the gelatinization temperature achieved a 57.32 % conversion, producing 434.65 mg/g maltopentaose as majority equivalent to 75.8 % of product mixture. This non-thermal saccharification process without glucose byproduct has significant potential for prebiotic production,adding value to starch-rich agricultural byproducts andcontributing to a sustainable, zero-waste starch industry.

富含淀粉的材料的增值通常需要在酶糖化之前进行高温糊化，将淀粉转化为可用的糖，然后将其转化为生化产品。为了绕过能量密集的糊化步骤，能够降解原料淀粉的有效耐热酶是必不可少的。在这项工作中，一种新的分离物Priestia koreensis HL12以西米淀粉为碳源，在30°C下加热48 h，产生了一种原料淀粉消化淀粉酶系统。该粗酶具有耐热性，在30 - 100°C的宽温度范围内表现出强大的淀粉酶活性，在65°C、50 mM磷酸钠缓冲液pH 6中对可溶性淀粉的淀粉酶活性最高（168.05 U/mg蛋白）。这种酶能有效地水解生淀粉和糊化淀粉，主要产生低麦芽寡糖（DP3和DP5）作为有价值的益生元，而不产生葡萄糖。糊化马铃薯淀粉的糖得率最高，为841.58 mg/g底物（转化率84%），而木薯浆在糊化温度以下水解的转化率为57.32%，产生434.65 mg/g麦芽糖戊二糖，占产品混合物的75.8%。这种无葡萄糖副产品的非热糖化过程具有巨大的益生元生产潜力，为富含淀粉的农业副产品增加价值，并为可持续的零浪费淀粉工业做出贡献。

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引用次数: 0

Renewable carbon sources as microbial substrates for the production of amylases and lignocellulases 可再生碳源作为生产淀粉酶和木质纤维素酶的微生物底物

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2026-04-01 Epub Date: 2025-07-09 DOI: 10.1016/j.crcon.2025.100356

Panagiota Diamantopoulou , George Aggelis , Seraphim Papanikolaou

In the present review-article several aspects dealing with the biotechnological production of two major groups of enzymes, viz. amylases and lignocellulases, are discussed. The chemical composition and structure of the substrates (viz. starch and related compounds and lignocellulose) on which these enzymes act, and the mechanisms implicated in substrate hydrolysis / transformation, are presented in detail. A significant number of microorganisms with very different physiology, i.e., belonging to bacteria, yeasts and fungi, is implicated in the production of these enzymes, under different conditions. As a result, the conditions concerning microbial growth and enzyme production are determined by the selected microorganism, carbon substrate and target enzyme. All these aspects, playing a critical role in enzyme production, together with biotechnological approaches used to maximize enzyme production are critically discussed. In conclusion, a plethora of prokaryotic and eukaryotic wild-type and / or genetically modified microorganisms can be implicated in the production of the above-mentioned types of enzymes. A significant number of renewable / low-cost compounds based on starch and / or lignocellulose can be subjected to microbial valorization with simultaneous production of these enzymes. The topic of the production of these enzymes is a timely and important one with long-range impact, given significant importance and the numerous applications that amylases and lignocellulases present in the agro-industrial, agro-food, biofuel, pharmaceutical, chemical and detergent facilities.

本文对两大类酶，即淀粉酶和木质纤维素酶的生物技术生产的几个方面进行了讨论。详细介绍了这些酶作用的底物（即淀粉和相关化合物和木质纤维素）的化学组成和结构，以及底物水解/转化的机制。大量具有不同生理机能的微生物，即细菌、酵母菌和真菌，在不同条件下参与这些酶的生产。因此，微生物生长和产酶的条件是由所选择的微生物、碳底物和靶酶决定的。所有这些方面，在酶的生产中发挥关键作用，连同生物技术方法用于最大化酶的生产进行了批判性的讨论。总之，大量的原核和真核野生型和/或转基因微生物可能涉及上述类型酶的生产。大量基于淀粉和/或木质纤维素的可再生/低成本化合物可以在这些酶同时生产的情况下进行微生物增值。鉴于淀粉酶和木质纤维素酶在农业工业、农业食品、生物燃料、制药、化学和洗涤剂设施中的重要性和众多应用，生产这些酶是一个具有长期影响的及时和重要的主题。

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引用次数: 0

Semi-industrial CO and CO2 conversion with biochar-supported Fe-based catalysts 半工业用生物炭负载铁基催化剂的CO和CO2转化

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2026-04-01 Epub Date: 2025-07-21 DOI: 10.1016/j.crcon.2025.100358

Mohammed H. Eldesouki , Usama Nour Eldemerdash , Mohamed Mokhtar Mohamed , Ahmed Abd El-Moneim

This research investigates the use of biochar derived from agricultural waste as a support material for Fe-based (Fe-Co-K) catalysts, with and without Zn, in CO and CO₂ hydrogenation, benchmarking its performance against commercial activated carbon. Under semi-industrial Fischer-Tropsch conditions, biochar-supported catalysts, particularly the Zn-enhanced variant (ZFCK@C), delivered superior catalytic outcomes. The catalysts were prepared using ultrasound-assisted dissolution and incipient wetness methods and characterized using FTIR, XRD, BET, H₂-TPR, CO₂-TPD, XPS, and TEM. In CO hydrogenation at 340 °C and 20 bar, ZFCK@C achieved a remarkable 97 % conversion, with 32 % longer hydrocarbons selectivity (C₅₊), 39.6 % olefins distribution(C₅₊), an O/P ratio of 4.0, and 45.3 % gasoline-range (C₅–C₁₂) hydrocarbons distribution. For CO₂ hydrogenation at 340 °C and 30 bar, the catalyst showed 40 % conversion, low CH₄ selectivity (6.1 %), high C₅₊ selectivity (45 %), 38.7 % olefins distribution(C₅₊), an O/P ratio of 3.2, and 45.3 % kerosene-range (C₆–C₁₆) hydrocarbons distribution. Stability testing over 100 h demonstrated excellent durability with no significant deactivation or sintering, making the catalyst viable for extended industrial use.

本研究研究了从农业废弃物中提取的生物炭作为CO和CO2加氢过程中含锌和不含锌的铁基（Fe-Co-K）催化剂的支撑材料，并将其性能与商业活性炭进行了对比。在半工业化的费托条件下，生物炭负载的催化剂，特别是锌增强型催化剂（ZFCK@C），具有优异的催化效果。采用超声辅助溶解法制备了催化剂，并用FTIR、XRD、BET、H2-TPR、CO2-TPD、XPS和TEM对催化剂进行了表征。在340℃和20 bar的CO加氢条件下，ZFCK@C的转化率达到了97%，烃类选择性（C5+）增加了32%，烯烃分布（C5+）增加了39.6%，O/P比为4.0，汽油范围（C5 - c12）烃类分布达到45.3%。在340℃和30 bar条件下，该催化剂的CO2加氢转化率为40%，CH4选择性低（6.1%），C5+选择性高（45%），烯烃分布为38.7% (C5+)， O/P比为3.2，煤油区（C6-C16）烃分布为45.3%。超过100小时的稳定性测试表明，该催化剂具有优异的耐久性，没有明显的失活或烧结，使其可以广泛用于工业用途。

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引用次数: 0

Efficient lactic acid production from sweet sorghum juice using Lactococcus lactis IO-1: Optimization and scale-up with low-cost nitrogen sources 利用乳酸乳球菌IO-1从甜高粱汁中高效产乳酸：低成本氮源的优化和规模化

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2026-04-01 Epub Date: 2025-07-24 DOI: 10.1016/j.crcon.2025.100357

Chalida Daengbussadee , Lakkana Laopaiboon , Khanittha Fiala , Thanawat Thanapornsin , Ampawun Meesubmun , Niphaphat Phukoetphim , Pattana Laopaiboon

Among the low-cost nitrogen sources (dry spent yeast or DSY, rice bran, and soybean meal), DSY was identified as the most suitable supplement for lactic acid fermentation from sweet sorghum juice by Lactococcus lactis IO-1. However, lactic acid concentration (P_L) using DSY was ∼22 % lower than the control nitrogen source, yeast extract (YE). Statistical analysis using YE as a control nitrogen source revealed optimal conditions of 74.70 g/L of initial sugar and 15.20 g/L of YE, achieving a P_L of 71.95 g/L and a 91.63 % sugar consumption (SC). When DSY (22.61 g/L) containing an equivalent nitrogen content to the optimal YE was tested, P_L and SC decreased to 55.13 g/L and 72.33 %, respectively. Increasing DSY to 33.92 g/L (1.5 times) improved lactic acid productivity (Q_L) by ∼31 % but did not enhance P_L or SC. However, supplementing 33.92 g/L of DSY with 7.60 g/L of YE enhanced lactic acid production by ∼19–53 %, achieving a P_L of 70.11 g/L, SC of 92.33 %, Q_L of 2.34 g/L·h, with a high lactic acid yield (Y_L/S), 1.02 g/g. Scale-up fermentation in a 7.5-L fermenter demonstrated comparable results to those using 15.20 g/L of YE alone. These findings demonstrate that sweet sorghum juice supplemented with DSY and reduced YE is a promising medium for efficient lactic acid production, offering significant cost reduction potential for industrial applications while maintaining high productivity and yield.

在低成本氮源（干废酵母或DSY、米糠和豆粕）中，DSY被确定为最适合乳酸乳球菌（Lactococcus lactotis）发酵甜高粱汁乳酸的添加物。然而，使用DSY的乳酸浓度（PL）比对照氮源酵母提取物（YE）低约22%。以YE为对照氮源进行统计分析，初始糖用量为74.70 g/L， YE用量为15.20 g/L的最佳条件下，产糖量为71.95 g/L，耗糖量为91.63%。当含氮量与最佳YE相当的DSY （22.61 g/L）时，PL和SC分别降至55.13 g/L和72.33%。将DSY增加到33.92 g/L（1.5倍），乳酸产率（QL）提高了约31%，但乳酸产率和乳酸SC均未提高。然而，在DSY中添加7.60 g/L的YE，乳酸产率提高了约19 - 53%，乳酸产率为70.11 g/L，乳酸SC为92.33%，乳酸QL为2.34 g/L·h，乳酸产率（YL/S）为1.02 g/g。在7.5 L发酵罐中放大发酵的结果与单独使用15.20 g/L YE的结果相当。这些发现表明，添加DSY和还原YE的甜高粱汁是一种很有前途的高效乳酸生产培养基，在保持高生产率和产量的同时，具有显著降低工业应用成本的潜力。

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引用次数: 0

Microwave-assisted pyrolysis of solid waste for the production of high-value carbon nanomaterials and hydrogen gas: a review 固体废物微波热解制备高价值纳米碳材料和氢气研究进展

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2026-04-01 Epub Date: 2025-07-13 DOI: 10.1016/j.crcon.2025.100355

Amani Hussein , Raihan Mahirah Ramli , Suriati Sufian , Najib Al-mahbashi , Siti Shawalliah Idris , Abid Salam Farooqi

The enormous amount of solid waste generated annually necessitates a transition toward circular economy strategies, especially targeting solid wastes such as waste tires, plastics, and biomass. This review explores microwave-assisted pyrolysis as a sustainable and efficient approach for converting these wastes into valuable products, specifically carbon nanomaterials (CNMs) and hydrogen gas (H₂). Compared to conventional pyrolysis, microwave-assisted techniques offer superior energy efficiency, faster heating rates, and higher product quality. A core focus of this review is the significant influence of catalysts and process parameters on the outcomes of microwave pyrolysis. Transition metal catalysts, particularly iron (Fe), cobalt (Co), and nickel (Ni), have demonstrated superior performance in enhancing both H₂ yield and CNMs synthesis. Bimetallic and composite catalysts exhibit enhanced microwave absorption and catalytic efficiency, making them highly suitable for this application. Moreover, critical process parameters, including microwave power, temperature, and residence time, play a pivotal role in determining product yield and quality. High microwave power and optimal temperature promote selective hydrogen generation and improve CNMs morphology, while prolonged residence time enhances gas yield. Finally, this review identifies existing knowledge gaps and outlines promising future directions for the efficient production of CNMs and hydrogen from various solid wastes using microwave-assisted pyrolysis.

每年产生的大量固体废物需要向循环经济战略过渡，特别是针对废轮胎、塑料和生物质等固体废物。这篇综述探讨了微波辅助热解作为一种可持续和有效的方法，将这些废物转化为有价值的产品，特别是碳纳米材料（CNMs）和氢气（H2）。与传统的热解相比，微波辅助技术具有更高的能源效率、更快的加热速度和更高的产品质量。本文的重点是催化剂和工艺参数对微波热解结果的显著影响。过渡金属催化剂，特别是铁（Fe）、钴（Co）和镍（Ni），在提高H2产率和CNMs合成方面表现出优异的性能。双金属和复合催化剂表现出增强的微波吸收和催化效率，使它们非常适合这种应用。此外，关键的工艺参数，包括微波功率、温度和停留时间，在决定产品收率和质量方面起着关键作用。高微波功率和最佳温度有利于选择性产氢，改善CNMs的形貌，延长停留时间可提高产气率。最后，本综述确定了现有的知识空白，并概述了利用微波辅助热解从各种固体废物中高效生产cnm和氢气的有希望的未来方向。

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引用次数: 0

Asphaltene-derived nanoporous carbon materials for CO2 capture and supercapacitors 用于二氧化碳捕获和超级电容器的沥青衍生纳米多孔碳材料

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2026-04-01 Epub Date: 2025-08-25 DOI: 10.1016/j.crcon.2025.100371

F.S. AlHumaidan, M.S. Rana, M. Vinoba, D. Ali, B. AlArbeed, M. AlMujaibel, H.M. AlSheeha, N. Rajasekaran

Nanoporous carbon materials were synthesized from asphaltenes using a thermo-chemical treatment under an inert atmosphere and in-situ KOH activation. N-doping was also employed in certain samples to reveal the impact of nitrogen on the properties of materials. The synthesized materials were fully characterized to disclose their textural properties, structural parameters, surface functional groups, elemental compositions, and morphologies. Textural property analysis revealed a remarkable increase in surface areas after alkaline treatment (∼1500–2000 m²/g), which was mainly ascribed to the formation of micro- and mesopores. The measurements of structural parameters endorse and complement the findings on textural properties. The asphaltene-derived porous carbons have been employed in energy storage and carbon capture applications. The materials exhibit specific capacitances ranging from 130 to 180 F/g at 0.2 A/g in a 3 M KOH. These results suggest that nitrogen doping significantly enhances the pseudocapacitive behavior of the electroactive materials by promoting Faradaic redox reactions and improving ion diffusion and adsorption rates. Asphaltene-derived porous carbons also exhibit notable CO₂ adsorption capacities of 3–4 mmol/g at 25 °C and 1 bar. Also, breakthrough experiments confirm that the N-doped material exhibits remarkable stability, reusability, and increased surface basicity, achieving an impressive CO₂ uptake of 0.446 mmol/g. These results highlight the potential of asphaltene-based porous carbons as efficient materials for carbon capture and energy storage applications.

以沥青质为原料，在惰性气氛和原位KOH活化下进行热化学处理，合成了纳米多孔碳材料。在某些样品中也使用了n掺杂来揭示氮对材料性能的影响。对合成的材料进行了充分的表征，揭示了它们的纹理性能、结构参数、表面官能团、元素组成和形态。织构性质分析显示，经过碱性处理（~ 1500-2000 m2/g）后，其表面积显著增加，这主要归因于微孔和中孔的形成。结构参数的测量支持并补充了对结构特性的研究结果。沥青质衍生多孔碳已被应用于能源储存和碳捕获。该材料在3 M KOH下0.2 A/g时的比电容范围为130至180 F/g。这些结果表明，氮掺杂通过促进法拉第氧化还原反应，提高离子扩散和吸附速率，显著提高了电活性材料的赝电容行为。沥青质衍生多孔碳在25℃和1 bar条件下也表现出3-4 mmol/g的CO2吸附能力。此外，突破性实验证实，n掺杂材料具有显著的稳定性、可重复使用性和增加的表面碱度，实现了0.446 mmol/g的CO2吸收量。这些结果突出了沥青基多孔碳作为碳捕获和能量储存应用的有效材料的潜力。

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引用次数: 0

Tailoring redox behavior of A-site defected LaxFe1-yNiyO3-δ perovskite oxygen carrier for chemical looping dry reforming of methane a位缺陷LaxFe1-yNiyO3-δ钙钛矿氧载体在甲烷化学环干重整中的氧化还原行为

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2026-04-01 Epub Date: 2025-08-09 DOI: 10.1016/j.crcon.2025.100369

Jianpeng Shi , Min Lin , Juping Zhang , Di Gao , Xing Zhu

Chemical looping dry reforming of methane (CL-DRM) is a promising process for syngas production. However, its application is limited by the trade-off between activity and selectivity in redox reactions. Herein, we designed efficient La_xFe_1-yNi_yO_3-δ (0.9 ≤ x ≤ 1.0, 0.05 ≤ y ≤ 0.4) perovskite-type oxygen carriers (OCs) for CL-DRM via A-site defect engineering and B-site doping. Compared to stoichiometric LaFeO₃, the optimized OCs exhibited enhanced oxygen mobility, which resulted in 20.7 % higher methane conversion, 33.8 % greater syngas yield, and retention of over 90 % carbon monoxide selectivity. Experimental results reveal that absence of La cation improved the oxygen vacancy concentration and oxygen mobility which promoted the partial oxidation of methane. This defect engineering scheme effectively alleviates sintering and inhibits carbon deposition (Raman I_D/I_G = 0.7). Consequently, the OCs exhibit structural stability and regeneration ability throughout 50 redox cycles. This study provides a simple and effective strategy for tuning the redox properties of perovskite oxides for thermochemical or redox-related reactions.

甲烷化学环法干法重整是一种很有前途的合成气生产工艺。然而，它的应用受到氧化还原反应中活性和选择性之间权衡的限制。本文通过a位缺陷工程和b位掺杂，设计了高效的CL-DRM钙钛矿型氧载体（OCs）。与化学量学的LaFeO3相比，优化后的OCs氧迁移率提高，甲烷转化率提高20.7%，合成气产率提高33.8%，一氧化碳选择性保持在90%以上。实验结果表明，La离子的缺失提高了甲烷的氧空位浓度和氧迁移率，促进了甲烷的部分氧化。该缺陷工程方案有效地缓解了烧结，抑制了积碳（Raman ID/IG = 0.7）。因此，OCs在50个氧化还原循环中表现出结构稳定性和再生能力。本研究为调整钙钛矿氧化物的氧化还原性能提供了一种简单有效的策略，用于热化学或氧化还原相关反应。

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引用次数: 0

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 : 2026-02-01 Epub 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。

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引用次数: 0