Journal of The Energy Institute最新文献_第8页

Sorption enhanced steam reforming of methanol for high-purity hydrogen production via Fe-doped Cu-MgO catalytic-sorption bifunctional material

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-16 DOI: 10.1016/j.joei.2025.102025

Zewei Shen , Long Han , Zhifu Qi , Haoran Ding , Shengxiao Mao , Haixiang Hong , Xuejian Yin , Tong Qiu , Linbin Xin , Yitian Shao , Guosheng Duan

{"title":"Sorption enhanced steam reforming of methanol for high-purity hydrogen production via Fe-doped Cu-MgO catalytic-sorption bifunctional material","authors":"Zewei Shen , Long Han , Zhifu Qi , Haoran Ding , Shengxiao Mao , Haixiang Hong , Xuejian Yin , Tong Qiu , Linbin Xin , Yitian Shao , Guosheng Duan","doi":"10.1016/j.joei.2025.102025","DOIUrl":"10.1016/j.joei.2025.102025","url":null,"abstract":"<div><div>One of the key routes toward green hydrogen storage and utilization is hydrogen production through green methanol reforming. In this study, Fe-doped Cu-MgO catalytic-CO<sub>2</sub> sorption bifunctional material was synthesized using the sol-gel method. The physicochemical properties of these materials were characterized using XRD, XPS, and CO<sub>2</sub>-TPD. Then the hydrogen production performance of sorption enhanced steam reforming of methanol (SE-SRM) was evaluated in a fixed-bed reaction system. The results revealed that the material's primary components were Cu, MgO, and Fe<sub>2</sub>O<sub>3</sub>. The addition of Fe component was beneficial for promoting Cu dispersion. The variation of the Fe doping amount influenced the interaction between Cu and MgO, altering the distribution of Cu ions, surface oxygen states, and CO<sub>2</sub> sorption active site occupancy. Moderate Fe doping significantly improved methanol conversion and H<sub>2</sub> selectivity. After 15 min of reaction time, Fe-doped materials exhibited significantly higher methanol conversion than standard Cu-MgO material. The influences of reforming temperature, water-to-methanol molar ratio, and aqueous methanol flow rate on the performance of Fe-doped Cu-MgO materials were also investigated. At reaction conditions of 200 °C, water-to-methanol ratio 1.50 and methanol flow rate of 0.10 mL/min, methanol conversion reached 77.5 % and hydrogen selectivity 83.1 %, which were superior to previous methanol reforming performance with Cu-based catalysts. Results from present study suggest that the bifunctional materials had strong potential for green methanol reforming application in hydrogen production.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102025"},"PeriodicalIF":5.6,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143570518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrogen production from catalytic steam-gasification of biomass using char and char-supported iron catalysts 使用木炭和木炭支撑铁催化剂催化生物质蒸汽气化制氢

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-15 DOI: 10.1016/j.joei.2025.102031

Yan Cao , Yu Bai , Jiang Du

{"title":"Hydrogen production from catalytic steam-gasification of biomass using char and char-supported iron catalysts","authors":"Yan Cao , Yu Bai , Jiang Du","doi":"10.1016/j.joei.2025.102031","DOIUrl":"10.1016/j.joei.2025.102031","url":null,"abstract":"<div><div>Char derived from the pyrolysis of carbon-based fuels, such as biomass and coal, has been widely used as a support material. In this study, biochar, coalchar, biochar-supported Fe (Fe/B) and coalchar-supported Fe (Fe/C) were prepared for tar cracking and H<sub>2</sub> enhancement during wood chips gasification. All experiments were conducted in a fluidized bed gasification system using steam as the gasification agent. The results revealed that the effectiveness of each catalyst in removing tar is ranked as follows: biochar < coalchar < Fe/B < Fe/C. The highest H<sub>2</sub> content (49.2 vol%) was also obtained at 800 <sup>°</sup>C and in the presence of 6 wt% Fe/C as catalyst. Tar cracking improved significantly with increasing Fe content from 0 to 6.0 wt%, but showed little further improvement beyond 6.0 wt% Fe content. The results indicated that adding steam had minimal effect on the tar content in the gas produced from the gasification of wood chips using the Fe/C catalyst. However, raising the gasifier temperature from 700 to 850 <sup>°</sup>C led to a significant reduction in tar yield. This reduction is attributed to the promotion of cracking and reforming reactions during the gasification process. This work showed that the char composition significantly influences its catalytic performance regarding tar reduction and H<sub>2</sub> enhancement.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102031"},"PeriodicalIF":5.6,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of sustainable methanol production via integrated co-gasification of rice husk and plastic coupled with its prediction and optimization using machine learning and statistical-based models

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-13 DOI: 10.1016/j.joei.2025.102029

Jamilu Salisu , Ningbo Gao , Cui Quan , Hang Seok Choi , Qingbin Song

{"title":"Modeling of sustainable methanol production via integrated co-gasification of rice husk and plastic coupled with its prediction and optimization using machine learning and statistical-based models","authors":"Jamilu Salisu , Ningbo Gao , Cui Quan , Hang Seok Choi , Qingbin Song","doi":"10.1016/j.joei.2025.102029","DOIUrl":"10.1016/j.joei.2025.102029","url":null,"abstract":"<div><div>To reduce reliance on fossil fuels and mitigate environmental impact, co-gasification of waste materials presents a promising alternative for methanol production. In modeling gasification process, kinetic-based models are predominant but are often complex and lack inherent optimization capabilities. This study couples a kinetic-based model with predictive models, aiming to provide an optimization-embedded and simplified simulation approach. Using Aspen Plus, an integrated model for methanol production via co-gasification of rice husk and plastic was developed. Model prediction and optimization were performed using response surface methodology (RSM) as a statistical approach and artificial neural network-genetic algorithm (ANN-GA) as a machine learning approach. Key input variables, including gasification temperature (GT), steam-to-feed ratio (STF), methanol production temperature (T) and pressure (P), were optimized for both the co-gasification and methanol sections. The integrated co-gasification-methanol model was successfully developed, achieving a root mean square error (RMSE) of 2.31 when validated with experimental data. Predictions using both ANN-GA and RSM methods yielded a coefficient of determination (R<sup>2</sup>) > 0.99, with ANN-GA showing superior prediction accuracy. Statistical analysis of variance (ANOVA) from the RSM results also confirmed the model significance. The optimal methanol yield was 0.6 kg/kg feed under GT = 850 °C, STF = 0.96–1.73, T = 234–255 °C, and P = 114–150 bar. While ANN-GA provided superior optimization across most variables, RSM was more effective for optimizing pressure. These findings demonstrate the effectiveness of integrating machine learning and statistical models with kinetic-based simulations for optimizing an integrated gasification-methanol system.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102029"},"PeriodicalIF":5.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A comparative investigation of biomass co-pyrolysis with polymeric wastes using electromagnetic induction heating

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-13 DOI: 10.1016/j.joei.2025.102023

Jannatul Ferdous, Md. Abu Rayhan Bhuiyan, Md. Belal Hossain Jisan, Fuhad Ahmed, Khandakar Akash, Mohammad Rofiqul Islam, Md. Abdul Kader

{"title":"A comparative investigation of biomass co-pyrolysis with polymeric wastes using electromagnetic induction heating","authors":"Jannatul Ferdous, Md. Abu Rayhan Bhuiyan, Md. Belal Hossain Jisan, Fuhad Ahmed, Khandakar Akash, Mohammad Rofiqul Islam, Md. Abdul Kader","doi":"10.1016/j.joei.2025.102023","DOIUrl":"10.1016/j.joei.2025.102023","url":null,"abstract":"<div><div>In this study, co-pyrolysis of biomass and polymeric wastes has been conducted in an electromagnetic induction (EMI)-heated fixed-bed reactor. The biomass feedstocks were water hyacinth (WH) and vegetable waste (VW), whereas the polymeric wastes were scrap tires (ST) and low-density polyethylene (LDPE). The maximum liquid yield of 67 wt.% was obtained with a WH/LDPE blend ratio of 30:70, at 450 °C for 50 min and with particle sizes ranging from 0.5 to 2 mm. The calorific value (CV) of the obtained co-pyrolysis oil was determined to be 40.38 MJ/kg. The co-pyrolysis-oil was characterized using gas chromatography-mass spectrometry (GC-MS) and fourier-transform infrared (FTIR) spectroscopy. The findings demonstrated that the oils had superior properties, such as a higher carbon and hydrogen content, and were mainly composed of aliphatic compounds, such as olefins. The addition of polymeric wastes (LDPE and ST) increased liquid yields even though the oils from VW/ST blends had greater amounts of sulfur and nitrogen. The results showed that the wastes in the study could be transformed into liquid products that could be used as alternatives to petroleum fuels in a variety of ways. It has also been proposed that the liquid product might be a good source of a number of useful chemical compounds.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102023"},"PeriodicalIF":5.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Promoting methane-rich biofuels production from gasification of biomass through direct methanation coupled with catalytic cracking of tar

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-12 DOI: 10.1016/j.joei.2025.102028

Lei Shi , Yinhai Su , Liren Yang , Yuanquan Xiong , Shuping Zhang

{"title":"Promoting methane-rich biofuels production from gasification of biomass through direct methanation coupled with catalytic cracking of tar","authors":"Lei Shi , Yinhai Su , Liren Yang , Yuanquan Xiong , Shuping Zhang","doi":"10.1016/j.joei.2025.102028","DOIUrl":"10.1016/j.joei.2025.102028","url":null,"abstract":"<div><div>Production of methane from biomass syngas is generally water-intensive due to the need to increase the H/C ratio through the water-gas shift reaction. Herein, after gasification of rice husk upstream, the syngas with low H/C ratio was utilized through direct methanation downstream to produce methane-rich biofuel without prior water-gas shift reaction for cost saving. After coupling the tar cracking reaction upstream to adjust the H/C ratio and the content of steam and tar, the performance of direct methanation was significantly enhanced. The CO conversion rate and CH<sub>4</sub> growth rate increased from 61.4 % to 110.7 %–94 % and 139.2 %, respectively, when the ratio of biomass to tar cracking catalyst was set at 1:1. Characterization results revealed that the addition of the tar cracking catalyst also reduced the formation of amorphous coke downstream, thereby improving the stability of the methanation catalyst. These findings suggest that coupling tar catalytic cracking with syngas direct methanation is a promising strategy to improve the quality of syngas.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102028"},"PeriodicalIF":5.6,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pyrolysis mechanism and gasification characteristics of actual municipal solid waste: A kinetic study through two-stage reaction models

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-11 DOI: 10.1016/j.joei.2025.102026

Ruochen Yang , Lei Jiang , Can Tong , Li Song , Xiong Zhang , Wei Liao , Haiping Yang , Shihong Zhang , Hanping Chen

{"title":"Pyrolysis mechanism and gasification characteristics of actual municipal solid waste: A kinetic study through two-stage reaction models","authors":"Ruochen Yang , Lei Jiang , Can Tong , Li Song , Xiong Zhang , Wei Liao , Haiping Yang , Shihong Zhang , Hanping Chen","doi":"10.1016/j.joei.2025.102026","DOIUrl":"10.1016/j.joei.2025.102026","url":null,"abstract":"<div><div>Municipal solid waste (MSW) gasification technologies represent a novel approach to waste management, while research on the kinetic characteristics and gasification behavior of actual MSW remains limited. In this paper, a new two-step kinetic model combining the segmentation of the main pyrolysis stages of MSW with Coats-Redfern (C-R) method which was more suitable for describing the pyrolysis process of actual MSW was established. Then the pyrolysis mechanism, tar generation process and the interactions among components, were thoroughly investigated based on this kinetic model. The results show the two-stage approach can effectively improve the accuracy of the MSW pyrolysis kinetic model (R<sup>2</sup> > 0.989). The first stage of MSW pyrolysis conforms to the reaction order model, while the second stage aligns with the geometric contraction model. The average activation energies of the two pyrolysis stages are 70.49 and 120.62 kJ/mol, which demonstrated that the two-stage reaction follows different types of reactions. Gasification experiments of MSW, guided by the kinetic model, indicate that higher temperature (T > 700 °C) and equivalence ratios (ER) can promote the gasification of MSW and tar, under the optimized conditions, the H<sub>2</sub> yield increased from 0.08 to 1.82 mmol/g, and the CO yield increased from 0.26 to 1.92 mmol/g. Further increasing the ER (ER > 0.5) can inhibit the conversion of benzene and polycyclic aromatic hydrocarbons (PAHs) by promoting the generation of CO₂. Increasing the ER and employing flue gas combustion to raise the CO₂ concentration during the gasification process is an ideal method for suppressing the formation of benzene and PAHs.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102026"},"PeriodicalIF":5.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on performance and emission optimization of MgO nanoparticle-enriched 2nd generation biodiesel: A method for employing nanoparticles to improve cleaner diesel combustion 富含氧化镁纳米粒子的第二代生物柴油性能和排放优化实验研究：利用纳米颗粒改善柴油清洁燃烧的方法

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-11 DOI: 10.1016/j.joei.2025.102024

Arif Savaş , Ramazan Şener , Samet Uslu , Oğuzhan Der

{"title":"Experimental study on performance and emission optimization of MgO nanoparticle-enriched 2nd generation biodiesel: A method for employing nanoparticles to improve cleaner diesel combustion","authors":"Arif Savaş , Ramazan Şener , Samet Uslu , Oğuzhan Der","doi":"10.1016/j.joei.2025.102024","DOIUrl":"10.1016/j.joei.2025.102024","url":null,"abstract":"<div><div>An important issue in reducing exhaust emissions and enhancing engine performance is transitioning from conventional fuels to renewable energy-based technologies. This shift is particularly crucial for compression ignition engines, which are widely used in the transportation industries. This study investigates the performance and emission characteristics of a compression ignition engine fueled with second-generation jojoba biodiesel, enhanced using MgO-based nano additives. Experiments were performed under variable load conditions ranging from 0.5 to 3.0 kW, with different concentrations of MgO (50 ppm, 100 ppm and 150 ppm) incorporated into the biodiesel blends. Response Surface Methodology (RSM) was employed to optimize fuel composition and operating conditions for maximum efficiency and minimum emissions. The results indicated a 6.7 % reduction in BSFC and a 7.3 % increase in BTE attributed to the improved combustion efficiency through the addition of 100 ppm MgO. Additionally, CO and HC emissions were reduced by 12.7 % and 30.1 %, respectively. Using RSM, the optimum parameters were found at a load of 1.49 kW and a MgO concentration of 40.9 ppm, achieving a desirability score of 0.7489. This study confirms that jojoba biodiesel with MgO nano additives shows significant potential as an eco-friendly alternative fuel, improving engine performance and reducing emissions. The findings provide valuable insights into its application, particularly in promoting environmental sustainability within the energy sector.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102024"},"PeriodicalIF":5.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Catalytic hydrothermal liquefaction of algae biomass for the production of high quality bio-oil: Effects of active metals and reaction process parameters

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-08 DOI: 10.1016/j.joei.2025.102018

Yanfang Zhu, Yibing Qin, Wenqi Song, Xiaoyuan Jin, Yuzhen Zhao

{"title":"Catalytic hydrothermal liquefaction of algae biomass for the production of high quality bio-oil: Effects of active metals and reaction process parameters","authors":"Yanfang Zhu, Yibing Qin, Wenqi Song, Xiaoyuan Jin, Yuzhen Zhao","doi":"10.1016/j.joei.2025.102018","DOIUrl":"10.1016/j.joei.2025.102018","url":null,"abstract":"<div><div>Catalytic hydrothermal liquefaction (HTL) has the potential to convert wet Nannochloropsis algae (NA) biomass waste into high-quality bio-oil. This study systematically investigates the effects of Ni, Ce, and Ce-Ni bimetals supported on ZnAl₂O₄ in enhancing bio-oil yield and quality. The bimetallic Ni-Ce/ZnAl₂O₄ catalyst in HTL of NA, using ethanol as a solvent, produced the highest bio-oil yield (56.8 wt%) compared to methanol (54.0 wt%) and water (43.8 wt%) at 280 °C for a reaction time of 45 min. The obtained bio-oils were characterized using various analytical methods. Compared to non-catalytic liquefaction, the Ni-Ce bimetallic catalysts significantly promoted hydrodeoxygenation and esterification, enhancing bio-oil quality. The highest yields of hydrocarbons (13.52 %) and esters (69.86 %) in the bio-oil were achieved using the Ni-Ce catalyst supported on ZnAl₂O₄. Furthermore, during catalytic liquefaction, the bio-oil exhibited a carbon content of 78.9 wt% and an oxygen content reduced to 13.3 wt%, resulting in a higher HHV of 35.6 MJ/kg bio-oil obtained. The introduction of Ni-Ce bimetallic catalysts also increased the low boiling point to 44.5 % containing function compounds in the bio-oil. The Ni-Ce/ZnAl₂O₄ catalyst demonstrated excellent stability and reusability, maintaining its performance after five cycles. These experimental findings provide valuable insights for future research on the aquatic algae biomass into quality bio-oil production.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"120 ","pages":"Article 102018"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nitrogen migration and transformation in gasification chars prepared from torrefied fiberboard

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-01 DOI: 10.1016/j.joei.2024.101946

Deliang Xu , Ming Zhao , Jun Sun , Lei Shi , Juntao Wei , Xun Hu , Bin Li , Shu Zhang

{"title":"Nitrogen migration and transformation in gasification chars prepared from torrefied fiberboard","authors":"Deliang Xu , Ming Zhao , Jun Sun , Lei Shi , Juntao Wei , Xun Hu , Bin Li , Shu Zhang","doi":"10.1016/j.joei.2024.101946","DOIUrl":"10.1016/j.joei.2024.101946","url":null,"abstract":"<div><div>Low-temperature thermal conversions can efficiently modify nitrogen configurations in biomass. This study focused on nitrogen migration and transformation during the torrefaction and subsequent gasification of fiberboard (FB), a common bioresource sourced from waste furniture, flooring, etc., which is characterized by high nitrogen content. The results indicated that as torrefaction temperatures reached 230 °C, the nitrogen loss rates in FB gradually decreased with further increased temperatures. This trend was primarily attributed the significant nitrogen loss due to the decomposition of urea formaldehyde (UF) before 230 °C. When the temperature rose to higher levels, the pyrolysis of lignocellulose caused the generation of active oxygen-containing groups, facilitating nitrogen re-fixation in chars. Moreover, amide-N in the FB was converted into more stable forms, pyrrole (N-5) and pyridine (N-6), thereby reducing the conversion of nitrogen into volatile compounds. During the gasification process, as torrefaction temperatures increased, the contents of quaternary nitrogen (N-Q) and nitrogen oxide (N-O) increased in the gasification chars from torrefied FB, while the contents of N-5 and N-6 decreased. This study analyzed the nitrogen migration pathways in torrefaction vs. torrefaction-gasification, exploring potential transformation mechanisms such as deamination reactions, Maillard reactions, and ring condensation reactions. These findings provide a crucial theoretical foundation for optimizing the treatment of waste FB and understanding the nitrogen migration and transformation during torrefaction-gasification integral process.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101946"},"PeriodicalIF":5.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient hydrodeoxygenation of lignin-derived oxygenates over Ni/Al2O3-C catalyst under mild conditions

IF 5.6 2区工程技术

Journal of The Energy Institute Pub Date : 2025-02-01 DOI: 10.1016/j.joei.2024.101944

Bowen Luo , Xiaoxin Chen , Yongxiang Guo , Riyang Shu , Chao Wang , Jianping Liu , Junyao Wang , Zhipeng Tian , Ying Chen

{"title":"Efficient hydrodeoxygenation of lignin-derived oxygenates over Ni/Al2O3-C catalyst under mild conditions","authors":"Bowen Luo , Xiaoxin Chen , Yongxiang Guo , Riyang Shu , Chao Wang , Jianping Liu , Junyao Wang , Zhipeng Tian , Ying Chen","doi":"10.1016/j.joei.2024.101944","DOIUrl":"10.1016/j.joei.2024.101944","url":null,"abstract":"<div><div>Hydrodeoxygenation (HDO) is a crucial technique for upgrading biomass-derived compounds, playing a significant role in the advancement of sustainable energy technologies. Under harsh reaction conditions, conventional HDO catalysts often suffer from reduced efficiency due to particle aggregation. This study presents a highly efficient Ni/Al<sub>2</sub>O<sub>3</sub>-C catalyst that mitigates this issue by stabilizing Ni metal particles and enhancing metal-support interactions. Characterization of the catalyst was carried out using XRD, TEM, and CO-TPD, which revealed that the incorporation of Al species improved metal dispersion and reduced the size of the Ni particles. Guaiacol, a phenolic compound derived from lignin, was chosen to evaluate the HDO performance under mild conditions. The optimized Ni/3Al<sub>2</sub>O<sub>3</sub>-5C catalyst achieved a guaiacol conversion of 99.9 % with a cyclohexane selectivity of 99.8 % at 210 °C. The outstanding performance is attributed to the high hydrogenation capacity of the small Ni particles and the acid sites on the carbon surface. Metal-support interactions stabilize the Ni particles, preventing leaching and deactivation. The catalyst has also exhibited comparable effectiveness in the HDO of both lignin-derived compounds and lignin-oils, confirming its adaptability across various substrates. The study demonstrates that Al<sub>2</sub>O<sub>3</sub>-C plays a crucial role in enhancing both the structural stability and catalytic efficiency of HDO catalysts, offering a promising approach for upgrading biomass-derived compounds.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"118 ","pages":"Article 101944"},"PeriodicalIF":5.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0