Carbon Resources Conversion最新文献

英文中文

Enhancing ethanol dehydration through optimized WO3 loading on activated carbon and montmorillonite clay catalysts

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.

{"title":"Enhancing ethanol dehydration through optimized WO3 loading on activated carbon and montmorillonite clay catalysts","authors":"Chaowat Autthanit , Sasiradee Jantasee , Jirayu Liewchalermwong , Narathip Thubthun , Supachai Jadsadajerm , Piyasan Praserthdam , Bunjerd Jongsomjit","doi":"10.1016/j.crcon.2025.100303","DOIUrl":"10.1016/j.crcon.2025.100303","url":null,"abstract":"<div><div>The objective of this study is to investigate the utilization of tungsten oxide (WO<sub>3</sub>) 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 WO<sub>3</sub> 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.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 1","pages":"Article 100303"},"PeriodicalIF":6.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143154663","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

Mesoporous carbon derived from lignin sulfonate as a sustainable cathode for high-performance aluminium batteries

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.

{"title":"Mesoporous carbon derived from lignin sulfonate as a sustainable cathode for high-performance aluminium batteries","authors":"Fathima Ali Kayakool , Harita Pant , Menestreau Paul , Glaydson Simões Dos Reis , Gopinathan Manavalan , Vadali Venkata Satya Siva Srikanth , Mikael Thyrel , Shaikshavali Petnikota","doi":"10.1016/j.crcon.2024.100301","DOIUrl":"10.1016/j.crcon.2024.100301","url":null,"abstract":"<div><div>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 m<sup>2</sup>/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.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 1","pages":"Article 100301"},"PeriodicalIF":6.4,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143154662","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

Utilization of CO2 and recycling of methanol Residue from the refining process for production of Bio-Methanol

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.

{"title":"Utilization of CO2 and recycling of methanol Residue from the refining process for production of Bio-Methanol","authors":"Rujira Jitrwung , Kuntima Krekkeitsakul , Nattawee Teerananont , Parinya Thongyindee , Weerawat Patthaveekongka , Chinnathan Areeprasert","doi":"10.1016/j.crcon.2024.100302","DOIUrl":"10.1016/j.crcon.2024.100302","url":null,"abstract":"<div><div>This study explores the synthesis of bio-methanol from biogas, focusing on the optimization of carbon dioxide (CO<sub>2</sub>) separation via alternating pressure adsorption and subsequent methanol production using varying methane (CH<sub>4</sub>) ratios. Methanol synthesis was conducted under CH<sub>4</sub>/CO<sub>2</sub> 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 CH<sub>4</sub> ratio led to enhanced CO<sub>2</sub> 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 CO<sub>2</sub> 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.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 1","pages":"Article 100302"},"PeriodicalIF":6.4,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143154680","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

Influence of grain size of acidic NiMo/TS-1 on its catalytic performance for hydrodesulfurization of dibenzothiophenes

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.

{"title":"Influence of grain size of acidic NiMo/TS-1 on its catalytic performance for hydrodesulfurization of dibenzothiophenes","authors":"Yutong Zou , Chengkun Xiao , Xiaoyang Kong , Liang Qiao , Wei Wang , Chunya Wang , Aijun Duan , Chunming Xu , Xilong Wang","doi":"10.1016/j.crcon.2024.100299","DOIUrl":"10.1016/j.crcon.2024.100299","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 1","pages":"Article 100299"},"PeriodicalIF":6.4,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143154100","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

Microwaved-induced co-pyrolysis of used engine lubricant and palm empty fruit bunch for alternative fuel recovery

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2024-12-10 DOI: 10.1016/j.crcon.2024.100300

Nivasini Paramasivam , Rubia Idris , Chooi Wen Tan , William Woei Fong Chong , Guo Ren Mong , Jahimin A. Asik , Atikah Ali , Nur Wahida Fatini Aidy , Fadzlita Mohd Tamiri , Siti Rahayu Mohd Hashim , Cheng Tung Chong

Alternative fuel recovery from used engine lubricant (UEL) and empty fruit bunch (EFB) was achieved through microwave co-pyrolysis. Co-pyrolysis was chosen for its potential to improve the quality of pyrolytic oil by generating synergistic effects between two distinct feedstocks, reducing activation energy, and enhancing pyrolytic oil quality. The central composite design (CCD) of response surface methodology (RSM) was used to optimise the temperature and EFB ratio. Atomic absorption spectrometry (AAS) was employed to characterise the heavy metal concentration in the pyrolytic oil. The optimised pyrolytic oil (UE450) produced the highest oil yield (25.17 wt%) with the lowest metal concentration at 450 °C with a 50 % EFB ratio. The fuel’s characteristics were similar to those of conventional diesel, with a higher value of HHV (45.17 MJ/kg). However, the oil was slightly acidic, with a pH of 4.3. GC–MS analysis of UE450 revealed the presence of alkanes and monoaromatic-rich hydrocarbons. Additionally, the UE450 biochar was characterised using FTIR, FESEM, and XRF. FTIR analysis showed that the carbonyl group (C = O) peaks at 1730 and 1440 cm⁻¹ disappeared, indicating that heavy metals were bound to the biochar surface. Likewise, XRF analysis of UE450 biochar revealed that zinc (Zn) exhibited a high metal adsorption capacity, following the sequence Zn > Fe > Pb (1.96, 1.06, and 0.81 mmol/g). The XRF results also indicated a significant removal of SO₃ at approximately 10.37 mmol/g.

{"title":"Microwaved-induced co-pyrolysis of used engine lubricant and palm empty fruit bunch for alternative fuel recovery","authors":"Nivasini Paramasivam , Rubia Idris , Chooi Wen Tan , William Woei Fong Chong , Guo Ren Mong , Jahimin A. Asik , Atikah Ali , Nur Wahida Fatini Aidy , Fadzlita Mohd Tamiri , Siti Rahayu Mohd Hashim , Cheng Tung Chong","doi":"10.1016/j.crcon.2024.100300","DOIUrl":"10.1016/j.crcon.2024.100300","url":null,"abstract":"<div><div>Alternative fuel recovery from used engine lubricant (UEL) and empty fruit bunch (EFB) was achieved through microwave co-pyrolysis. Co-pyrolysis was chosen for its potential to improve the quality of pyrolytic oil by generating synergistic effects between two distinct feedstocks, reducing activation energy, and enhancing pyrolytic oil quality. The central composite design (CCD) of response surface methodology (RSM) was used to optimise the temperature and EFB ratio. Atomic absorption spectrometry (AAS) was employed to characterise the heavy metal concentration in the pyrolytic oil. The optimised pyrolytic oil (UE450) produced the highest oil yield (25.17 wt%) with the lowest metal concentration at 450 °C with a 50 % EFB ratio. The fuel’s characteristics were similar to those of conventional diesel, with a higher value of HHV (45.17 MJ/kg). However, the oil was slightly acidic, with a pH of 4.3. GC–MS analysis of UE450 revealed the presence of alkanes and monoaromatic-rich hydrocarbons. Additionally, the UE450 biochar was characterised using FTIR, FESEM, and XRF. FTIR analysis showed that the carbonyl group (C = O) peaks at 1730 and 1440 cm<sup>−1</sup> disappeared, indicating that heavy metals were bound to the biochar surface. Likewise, XRF analysis of UE450 biochar revealed that zinc (Zn) exhibited a high metal adsorption capacity, following the sequence Zn > Fe > Pb (1.96, 1.06, and 0.81 mmol/g). The XRF results also indicated a significant removal of SO<sub>3</sub> at approximately 10.37 mmol/g.</div></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"8 1","pages":"Article 100300"},"PeriodicalIF":6.4,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143154099","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

Outside Back Cover

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2024-12-01 DOI: 10.1016/S2588-9133(24)00083-8

引用次数: 0

Simultaneous biomethane and hydrochar recovery from washed elephant dung: The effects of inoculum source, substrate to inoculum ratio, and hydrothermal temperature 从洗象粪中同时回收生物甲烷和烃类：接种物来源、底物与接种物比和热液温度的影响

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2024-11-24 DOI: 10.1016/j.crcon.2024.100297

Chayanon Sawatdeenarunat , Boonya Charnnok , Rojapun Nirunsin , Sumate Chaiprapat , Chen-Yeon Chu

This research aims to develop the appropriate biorefinery process integrating anaerobic digestion (AD) and hydrothermal carbonization (HTC) to recover the highest energy from the pretreated elephant dung. Initially, the raw elephant dung was physically processed by washing with water to generate the liquid waste, i.e., washing water (WW), and solid waste, i.e., washed fiber (WF). The appropriate substrate-to-inoculum ratio (SIR) and the inoculum source of the AD of WW were determined and the HTC temperature of WF was also examined. The results indicated that the AD of WW with the SIR of 1:2 and anaerobically digested swine manure as the inoculum presented the highest methane and energy yields of 412.3 ± 9.9 N mL/g VS _added and 2,220.1 ± 53.03 MJ/ton dry wt., respectively. For HTC of WF, the optimum condition was the hydrothermal temperature of 170 °C at the residence time of 60 min. The highest hydrochar and energy yields were 76.8 % ± 1.9 % dry wt. and 12,067.0 ± 452.1 MJ/ton dry wt., respectively. Thus, this biorefinery process could simultaneously treat elephant camp-derived waste and produce clean energy.

本研究旨在开发厌氧消化（AD）和水热碳化（HTC）相结合的生物精炼工艺，以从预处理的大象粪便中回收最高的能量。最初，原始的大象粪便是通过用水洗涤的物理处理产生液体废物，即洗涤水（WW）和固体废物，即洗涤纤维（WF）。确定了WW菌株适宜的底物接种比（SIR）和接种源，并对WF菌株的HTC温度进行了测定。结果表明，以厌氧消化猪粪为接种物，添加SIR为1:2时，WW的甲烷和能量产量最高，分别为412.3±9.9 N mL/g VS和2220.1±53.03 MJ/t干wt。水热温度为170℃，停留时间为60 min，可获得最高的干wt为76.8%±1.9%，干wt为12067.0±452.1 MJ/t。因此，这种生物精炼过程可以同时处理大象营地产生的废物并产生清洁能源。

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引用次数: 0

Catalytic gasification of a single coal char particle: An experimental and simulation study 单一煤炭颗粒的催化气化：实验和模拟研究

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2024-11-22 DOI: 10.1016/j.crcon.2024.100296

Zhuoran Liu , Xingjun Wang , Qian Chen , Hongxia Li , Qinghua Guo , Guangsuo Yu , Haifeng Liu , Fuchen Wang

The catalytic coal gasification technology has been widely researched and developed under the background of “Carbon peaking and carbon neutrality goals”. Currently, most of catalytic gasification experiments on coal char particles are analyzed by thermogravimetric analyzer (TGA). However, the gasification agent will be subject to diffusion resistance during the reaction because of the sample stacking, making the inherent reaction kinetics unclear. In this study, we investigated the catalytic gasification behavior of single-particle coal char using high temperature stage microscope (HTSM). With the diffusion resistance ruled out, the reaction conditions when using a HTSM are more similar to those inside a real industrial gasifier. Numerical models of the gasification reaction of single-particle coal char were further developed using the kinetic parameters obtained under HTSM. Three models were investigated, including regular spherical structured, irregular spherical structured and porous spherical structured models, representing different morphologies of coal char particles in the gasifier. The gasification characteristics of coal char particles under different K₂CO₃ catalyst loadings and gasification temperatures were also studied. Compared with the activation energies data of coal char particles without catalyst, the activation energies of coal char particles loaded with 2.2 %, 4.4 %, 6.6 %, and 10.0 % catalysts were reduced by 110 kJ/mol, 116 kJ/mol, 121 kJ/mol, and 126 kJ/mol, respectively. The reaction surface area affects the temperature distribution. The temperature near the irregular spherical particle is about 20 K higher than the temperature near the regular spherical particle.

在 "碳调峰和碳中和目标 "的背景下，催化煤气化技术得到了广泛的研究和发展。目前，煤炭颗粒催化气化实验大多采用热重分析仪（TGA）进行分析。然而，由于样品堆积的原因，气化剂在反应过程中会受到扩散阻力的影响，导致固有反应动力学不明确。本研究利用高温台式显微镜（HTSM）研究了单颗粒煤炭的催化气化行为。由于排除了扩散阻力，使用 HTSM 时的反应条件与实际工业气化炉内的反应条件更为相似。利用在 HTSM 下获得的动力学参数，进一步建立了单颗粒煤炭气化反应的数值模型。研究了三种模型，包括规则球形结构模型、不规则球形结构模型和多孔球形结构模型，分别代表气化炉中不同形态的煤炭颗粒。同时还研究了不同 K2CO3 催化剂负载量和气化温度下煤炭颗粒的气化特性。与未添加催化剂的煤炭颗粒的活化能数据相比，添加 2.2 %、4.4 %、6.6 % 和 10.0 % 催化剂的煤炭颗粒的活化能分别降低了 110 kJ/mol、116 kJ/mol、121 kJ/mol 和 126 kJ/mol。反应表面积会影响温度分布。不规则球形颗粒附近的温度比规则球形颗粒附近的温度高约 20 K。

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引用次数: 0

Improved biohydrogen production from lactic acid bacteria contaminating substrates by enriched hydrogen-producing consortium with lactate-fermentation pathway 利用乳酸发酵途径的富集产氢联合体提高乳酸菌污染底物的生物制氢能力

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2024-11-17 DOI: 10.1016/j.crcon.2024.100295

Phonsini Ngamnurak , Alissara Reungsang , Pensri Plangklang

The hydrogen-producing consortium conveying the lactate-fermentation pathway was enriched and used as a co-inoculum with the non-enriched hydrogen-producing consortium for biohydrogen production in the presence of lactic acid bacteria (LAB). The co-inoculum treatment achieved superior hydrogen production performance compared to that of the non-enriched consortium treatment. The effects of enriched consortium concentration, initial pH, and glucose concentration were evaluated, and hydrogen production potential (HP) of 1,605 ± 161 mL-H₂/L and a maximum hydrogen production rate (HPR) of 87.17 ± 15.85 mL-H₂/L.h were achieved under optimal conditions. Biohydrogen production from food waste using the co-inoculum was 1,137 mL-H₂/L from non-autoclaved food waste, corresponding to 56.85 mL-H₂/g-VS_added. Metabolite product and microbial community analyses during food waste fermentation indicated positive cross-feeding activity of hydrogen producers, LAB, and acetogenic bacteria. This study provides valuable information on the use of an efficient, enriched hydrogen-producing consortium to improve biohydrogen production from LAB-contaminated feedstock.

在有乳酸菌（LAB）存在的情况下，富集了乳酸发酵途径的产氢联合菌群，并将其与非富集的产氢联合菌群作为共同接种物用于生物制氢。与非富集联合菌群处理相比，共接种物处理取得了更优越的制氢性能。评估了富集菌群浓度、初始 pH 值和葡萄糖浓度的影响，在最佳条件下，产氢潜力（HP）为 1,605 ± 161 mL-H2/L，最大产氢率（HPR）为 87.17 ± 15.85 mL-H2/L.h。使用联合接种物从未经高温高压灭菌的食物垃圾中产生的生物氢为 1,137 mL-H2/L，相当于 56.85 mL-H2/g-VSadded。餐厨垃圾发酵过程中的代谢产物和微生物群落分析表明，产氢菌、酵母菌和产乙酸菌具有积极的交叉进食活性。这项研究为利用高效、富集的产氢联合体来提高受 LAB 污染的原料的生物制氢能力提供了宝贵的信息。

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引用次数: 0

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IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2024-09-01 DOI: 10.1016/S2588-9133(24)00071-1

引用次数: 0

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