Journal of The Energy Institute最新文献

{"title":"Hydrothermal pretreatment for controlling bamboo biomass composition and regulating pore structure of bamboo-based activated carbon for CO2 adsorption","authors":"Bingjie Wang ,&nbsp;Qiang Xie,&nbsp;Yutong Sha,&nbsp;Sirui Qian,&nbsp;Jinchang Liu,&nbsp;Dingcheng Liang","doi":"10.1016/j.joei.2025.102341","DOIUrl":"10.1016/j.joei.2025.102341","url":null,"abstract":"<div><div>Activated carbon with a narrow distribution of ultra micropores is regarded as a promising CO₂ adsorbent. Although chemical activation increases ultra microporosity, it entails high cost, equipment corrosion, and limited scalability. In this study bamboo was used as the precursor, and hydrothermal pretreatment was introduced prior to carbonization and steam activation to regulate the 0.5–0.7 nm pore-size distribution by adjusting the cellulose/lignin ratio. Biomass composition analysis together with N₂/CO₂ adsorption measurements was employed to establish the composition-structure-performance linkage. Results show that the sample derived from bamboo hydrothermally pretreated at 180 °C for 6 h, is featured with abundant micropores, with a distribution centered at 0.5–0.7 nm and a specific surface area of 1025 m²/g, achieving a CO₂ adsorption capacity of 3.91 mmol/g at 273 K and 1 bar. Overall, this work demonstrates a scalable, reagent-free physical-activation pathway that regulates the narrow distribution of ultra micropores, delivering CO₂ adsorbents suitable for energy and industrial systems.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"124 ","pages":"Article 102341"},"PeriodicalIF":6.2,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327358","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}

{"title":"In-situ hydrodeoxygenation of a lignin-derived monomer using Ar dielectric barrier discharge plasma: From conversion performance to mechanism analysis","authors":"Yadi Liu,&nbsp;Yan Sun,&nbsp;Xiaojiao Wu,&nbsp;Hui Zhong,&nbsp;Yifan Peng,&nbsp;Yudong Song,&nbsp;Zixin Fu,&nbsp;Ying Sun,&nbsp;Xiaolong Wang","doi":"10.1016/j.joei.2025.102344","DOIUrl":"10.1016/j.joei.2025.102344","url":null,"abstract":"<div><div>Bio-oil derived from lignin biomass serves as a promising alternative to fossil fuels. However, due to its high oxygen content and low energy density, it requires hydrodeoxygenation (HDO) to be viable as a biofuel. Non-thermal plasma, as an innovative molecular activation method, enables HDO of bio-oil under ambient conditions without catalysts. Nevertheless, the relationship between operating conditions, plasma characteristics, and product distribution remains unclear, necessitating elucidation of the underlying reaction mechanisms. Herein, we present an <em>in</em>-<em>situ</em> hydrogenation approach for the plasma-assisted conversion of a lignin monomer (guaiacol) using Ar dielectric barrier discharge plasma without an external hydrogen source. By integrating conversion experiments with reactive molecular dynamics simulations, we reveal the mechanisms governing the effects of temperature and H radical on guaiacol conversion. Results show that increasing temperature promotes demethoxylation of guaiacol, yielding cresol and phenol. Excessively high temperatures inhibit dehydroxylation while facilitating O-CH₃ bond cleavage, leading to increased formation of undesired catechol. Around 400 K represents an optimal reaction temperature. As the applied voltage increases, the concentrations of desired liquid products (cresol, phenol, anisole) first rise then decline. This occurs because while H radical concentration progressively rises with the voltage, H radical-mediated deoxygenation efficiency peaks and subsequently decreases. Thus, maintaining an optimal H radical concentration range enhances conversion efficiency. Overall, the revealed interaction mechanisms between plasma-generated H radicals and guaiacol provide novel insights and guiding principles for future bio-oil upgrading.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"124 ","pages":"Article 102344"},"PeriodicalIF":6.2,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327355","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}

{"title":"Experimental study on chemiluminescence characteristics of ammonia/methane partially premixed swirling flames","authors":"Liqiao Jiang ,&nbsp;Haihang Su","doi":"10.1016/j.joei.2025.102336","DOIUrl":"10.1016/j.joei.2025.102336","url":null,"abstract":"<div><div>Understanding the complex chemiluminescence characteristics of ammonia/methane partially premixed flames is crucial for developing optical diagnostic sensors, yet it remains insufficiently investigated. This study experimentally examines the combustion characteristics of ammonia/methane partially premixed swirling flames with spectral analysis and key excited radical imaging of flame chemiluminescence signals. The effects of both the global equivalence ratio (<em>φ</em>) and the ammonia blending ratio (<em>X</em>_<em>NH3</em>) on flame chemiluminescence characteristics were explored. The results demonstrate that in weak turbulent swirling flames, the flame chemiluminescence spectra exhibit pronounced distinctions between the 280–400 nm ultraviolet (UV) band and the 400–800 nm visible band. With increasing <em>X</em>_<em>NH3</em>, the chemiluminescence intensity decreases in the UV range while concurrently enhancing in the visible spectrum. Notably, the flame background radiation displays a similar trend. The integrated chemiluminescence intensities of key radicals (OH∗, NH∗, CN∗, CH∗, and NH₂∗) exhibit a non-monotonic trend with <em>φ</em>, namely initially increasing before peak value and subsequently decreasing. Additionally, OH∗, CN∗, and CH∗ chemiluminescence intensities diminish with the increase of <em>X</em>_<em>NH3</em>, whereas NH₂∗ displays an opposing trend of intensity enhancement under the same conditions. The intensity ratios of CH∗/OH∗, NH₂∗/OH∗, and NH₂∗/CH∗ are sensitive to changes in <em>φ</em> and <em>X</em>_<em>NH3</em>. Specifically, the NH₂∗/CH∗ can be the markers of <em>φ</em> and <em>X</em>_<em>NH3</em> due to the monotonically varying trend. The flame dynamic characteristics can be represented by the fluctuated chemiluminescence intensity of excited radicals such as OH∗ and NH∗. It demonstrates a significantly quantitative correlation between NO emission and normalized chemiluminescence intensities (OH∗/NH∗/CN∗/CH∗/NH₂∗) in present experimental conditions. The findings provide critical insights for developing chemiluminescence diagnostic strategies in ammonia/methane combustion applications.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"124 ","pages":"Article 102336"},"PeriodicalIF":6.2,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327361","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}

{"title":"Carbon-based catalysts for methane dry reforming: Advances, challenges, and prospects","authors":"Guangbing Zhao ,&nbsp;Dong Shen ,&nbsp;Shihua Zheng ,&nbsp;Jiuhong Wei ,&nbsp;Ying Wang ,&nbsp;Yuqiong Zhao ,&nbsp;Jun Liu ,&nbsp;Guoqiang Li ,&nbsp;Guojie Zhang","doi":"10.1016/j.joei.2025.102342","DOIUrl":"10.1016/j.joei.2025.102342","url":null,"abstract":"<div><div>Dry reforming of methane (DRM) is a promising catalytic process that converts two major greenhouse gases—methane (CH₄), and carbon dioxide (CO₂)—into syngas with a near-unity H₂/CO ratio, offering both environmental and economic benefits. As a key technology in China's \"dual carbon\" strategy, DRM faces challenges from catalyst deactivation due to coking and sintering of active metal sites. Carbon-based materials are promising supports for DRM catalysts due to their high surface area, porous structure, and corrosion resistance. These materials help prevent sintering by dispersing active metal nanoparticles, while their surface electronic effects enhance CH₄ activation and reduce carbon deposition. This review discusses the structural and physicochemical properties of various carbon materials—such as activated carbon, carbon nanotubes, biochar, graphene, and hydrochar—and their roles in DRM. It also covers strategies for metal loading, support modifications (e.g., heteroatom doping and defect engineering), composite synergies, and the influence of preparation methods like microwave-assisted synthesis and solid-state techniques on catalyst performance. Finally, it addresses key challenges such as high-temperature stability and long-term coke resistance, offering insights and future directions for advancing carbon-based catalysts in DRM applications.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"124 ","pages":"Article 102342"},"PeriodicalIF":6.2,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327359","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}

{"title":"Decoupling study on volatiles-char interaction during co-pyrolysis of dry/wet torrefied biomass and coal: Influence of pyrolysis temperature","authors":"Yali Gao ,&nbsp;Na Gao ,&nbsp;Ziliang Zhang ,&nbsp;Dengyu Chen ,&nbsp;Jiaofei Wang ,&nbsp;Xudong Song ,&nbsp;Guangsuo Yu ,&nbsp;Juntao Wei","doi":"10.1016/j.joei.2025.102347","DOIUrl":"10.1016/j.joei.2025.102347","url":null,"abstract":"<div><div>Torrefied biomass-coal co-pyrolysis was a promising route to realize high-efficiency utilization of renewable and fossil energy. Volatiles-char interaction during co-pyrolysis impacts char structure and downstream applications. However, the relevant mechanism remains unclear, and thus decoupling study was necessary. In this study, dry/wet torrefied biomass (RST300/RSH300) was prepared at 300 °C using autoclave reactor and fixed-bed reactor, respectively. Decoupled co-pyrolysis experiments were subsequently conducted at different pyrolysis temperatures (600, 700 and 800 °C) using a staged fixed-bed reactor. Furthermore, various structural characterization techniques (SEM, Raman and FTIR) were coupled to explore the pathway influencing the char structure evolution. The decoupling studies of RST/RSH300-BC co-pyrolysis showed that compared to BC char from individual pyrolysis, RST-BC co-pyrolysis led to significantly more surface deposits. In contrast, RSH-BC co-pyrolysis produced BC char with diverse crack morphologies. At all temperatures, the -OH and C=C peak intensities in RSH-BC chars were much higher than in RST-BC chars. The graphitic ordering of BC chars from both co-pyrolysis systems decreased compared to individual pyrolysis, with RSH300-BC showing a more pronounced reduction. The decoupling results of BC-RST/RSH300 revealed that compared to individual RST/RSH chars, co-pyrolyzed RST char had partially blocked cracks at 700 °C and 800 °C. Both co-pyrolyzed RST/RSH300 char showed higher -OH and C-O-C peak intensities. Notably, at 600 °C and 700 °C, the graphitic ordering improved in both co-pyrolyzed RST/RSH300 chars, with RSH chars showing significant enhancement.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"124 ","pages":"Article 102347"},"PeriodicalIF":6.2,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327357","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}

{"title":"ZIF-derived spinel CoMn2O4 with hierarchically porous architecture and optimized surface chemistry for efficient low-temperature fast NH3-SCR","authors":"Fei Zheng ,&nbsp;Jianyi Lu ,&nbsp;Qing Xu ,&nbsp;Minghao Zhang ,&nbsp;Bowen Zhao ,&nbsp;Jiukun Ji ,&nbsp;Zhiyong Zhou","doi":"10.1016/j.joei.2025.102339","DOIUrl":"10.1016/j.joei.2025.102339","url":null,"abstract":"<div><div>To address the intrinsic limitations of conventional spinel oxides in low-temperature NH₃-SCR, a hierarchically porous spinel CoMn₂O₄ with optimized surface chemistry was constructed via a ZIF-derived strategy. By leveraging the structural directivity and compositional tunability of the ZIF precursor, CoMn-ZIF displays a sheet-like architecture containing interlinked pores and numerous surface hollows. This effectively mitigates nanoparticle agglomeration, while enhancing gas-phase diffusion and maximizing active site accessibility. Beyond this morphology optimization, this approach simultaneously modulates the key surface chemical properties, characterized by enriched oxygen vacancies, enhanced redox capacity, elevated surface active oxygen species, as well as a high density of Brønsted and Lewis acid sites. Such integrated characteristics enhance NH₃ adsorption and NO oxidation, which in turn accelerate the onset and progression of the fast SCR pathway. As a result, CoMn-ZIF shows exceptional low-temperature NH₃-SCR performance with above 90 % NO conversion at 150 °C, outperforming conventional spinel CoMn. Moreover, CoMn-ZIF also exhibits remarkable catalytic stability under diverse operating conditions, including fluctuating NO concentrations, varying space velocities, and the presence of H₂O and SO₂, underscoring its suitability for operation in variable industrial environments. In situ DRIFTS confirms the formation of NO₂ and -NH₂NO intermediate, providing direct evidence for the dominance of the fast SCR pathway. This study presents a rational strategy for the design of high-performance spinel oxide catalysts targeting efficient low-temperature NH₃-SCR applications.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"123 ","pages":"Article 102339"},"PeriodicalIF":6.2,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323690","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}

{"title":"Tailoring intermediates in steam reforming of acetic acid via porosity-confined acid sites on Ni/SiO2 for enhanced catalytic activity","authors":"Yunyu Guo ,&nbsp;Yueyue Song ,&nbsp;Yangfan Zhang ,&nbsp;Wenjian Liu ,&nbsp;Mengjiao Fan ,&nbsp;Chao Li ,&nbsp;GuoZhu Chen ,&nbsp;Shu Zhang ,&nbsp;Xun Hu","doi":"10.1016/j.joei.2025.102338","DOIUrl":"10.1016/j.joei.2025.102338","url":null,"abstract":"<div><div>Although non-noble Ni-based catalysts exhibit high activity in the steam reforming for hydrogen production, their rapid deactivation caused by sintering of active sites and carbon deposition remains a major obstacle. This study investigated the effects of SiO₂ support synthesis methods-hydrothermal (SiO₂-H), Stöber (SiO₂-S), and commercial (SiO₂-C) on the catalytic performance and coke resistance of Ni/SiO₂ catalysts in steam reforming of acetic acid. Catalytic activity tests revealed that hydrothermally synthesized Ni/SiO₂-H achieved exceptional H₂ yields of 91.3 % and near-complete acetic acid conversion (99.4 %) at 600 °C, outperforming Ni/SiO₂-S (73.3 % H₂ yield) and Ni/SiO₂-C (71.2 % H₂ yield). <em>In-situ</em> DRIFT measurement identified transient surface intermediates and indicated that Ni/SiO₂-H exhibited rapid intermediate turnover frequency, attributable to its dendritic mesopores, abundant acid sites, and hydroxyl-rich surface. These characteristics promoted efficient gasification of reactive fragments, thereby minimizing carbon retention. Thermogravimetric analysis revealed superior coke resistance for Ni/SiO₂-H (51.3 wt% coke vs. 65.9–66.9 wt% for Ni/SiO₂-S and Ni/SiO₂-C) and higher oxidation temperature of coke (621 °C), indicative of more graphitic carbon with enhanced stability in resulting carbon deposit. Transmission electron microscopy elucidated coke morphology disparities: smooth-walled carbon nanotubes formed via controlled growth mechanisms over Ni/SiO₂-H, while Ni/SiO₂-S and Ni/SiO₂-C as the catalysts generated defective carbon nanotubes and amorphous carbon due to pore confinement and impurity-driven nucleation. The synthesis-dependent structural properties of SiO₂-hierarchical mesoporous (Ni/SiO₂-H), layered mesopores (Ni/SiO₂-S), and blocky mesopores (Ni/SiO₂-C)-were conclusively linked to catalytic activity and carbon resistance.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"123 ","pages":"Article 102338"},"PeriodicalIF":6.2,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323686","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}

{"title":"Influence of water injection on the formation of CO emissions in oxyfuel combustion of low calorific gaseous fuels","authors":"Felix Lehner ,&nbsp;Christian Groves ,&nbsp;Martin Meiller ,&nbsp;Sławomir Sładek ,&nbsp;Philipp Schlatter","doi":"10.1016/j.joei.2025.102335","DOIUrl":"10.1016/j.joei.2025.102335","url":null,"abstract":"<div><div>Oxyfuel combustion is a promising approach to apply carbon capture and thus counteract global warming. The pure oxygen used as an oxidizer is usually diluted with CO₂, H₂O or recirculated flue gas to moderate the combustion temperature, which influences the combustion characteristics like temperature distribution and CO formation. This paper deals with how the injection of liquid water in the combustion chamber affects the characteristics of MILD oxyfuel combustion of a low calorific natural gas/CO₂ mixture, which is supposed to represent biogas. Experimental tests are carried out on a 50 kW pilot plant, where the amount of recirculated flue gas and the water injection rate are varied in order to determine whether the influences can also be measured in the cold carbon-capture-ready flue gas. Moreover, CFD simulations of the combustion process with and without water injection are conducted to better understand the influence of water injection on the combustion characteristics. Results show that the injection of water leads to lower CO emissions, measurable in the cold flue gas. Furthermore, the reaction CO + OH ⇌ CO₂ + H, which is mainly responsible for CO combustion, is shifted to the right side, indicating a promotion in CO burnout. In addition, it is found that water injection is an efficient way of controlling the combustion chamber temperature in oxyfuel combustion systems without causing significant temperature peaks or strong inhomogeneities in the temperature field.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"123 ","pages":"Article 102335"},"PeriodicalIF":6.2,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323854","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}

{"title":"Beyond the peak temperature: An experimental evaluation of conventional vs. effective thermodynamic models for biomass pyrolysis","authors":"Hammed Adeniyi Salami,&nbsp;Javier Eliel Morales-Mendoza,&nbsp;Jorge Luis Domínguez-Arvizu,&nbsp;Felipe Angel Gaxiola-Cebreros,&nbsp;Blanca Cristina Hernández-Majalca,&nbsp;José Luis Bueno-Escobedo,&nbsp;Iyiade Gbolahan Alalade,&nbsp;Gabriela Edith Valenzuela-Castro,&nbsp;Lucero Pérez-Hernández,&nbsp;Alejandro López-Ortiz,&nbsp;Virginia Hidolina Collins-Martínez","doi":"10.1016/j.joei.2025.102333","DOIUrl":"10.1016/j.joei.2025.102333","url":null,"abstract":"<div><div>Accurate interpretation of thermogravimetric data depends on the thermodynamic model used, yet experimental comparisons of standard methods are limited. This study critically evaluates the conventional (CA) and effective thermodynamic (ETA) approaches for analyzing the pyrolysis of Sotol bagasse (SB), an extractive-rich agro-industrial residue. Both models confirmed that SB pyrolysis is feasible and endothermic; however, they produced substantial differences in entropy (ΔS) and Gibbs free energy (ΔG) due to their theoretical foundations. The CA relies on a single peak temperature (Tp), which fails to represent the multi-stage nature of pyrolysis. In contrast, the ETA uses conversion-dependent temperatures (Tα), capturing reaction progression and biomass heterogeneity more accurately. Comparisons with other biomasses showed that CA consistently underestimates ΔS and overestimates ΔG below Tp, with the trend reversing above Tp, whereas ETA provided consistent and mechanistically meaningful trends. Although both models yielded similar enthalpy (ΔH), the ETA revealed a thermodynamic shift toward increased exothermicity and reduced spontaneity at higher conversions (α &gt; 0.35), likely due to SB's high extractive content (≈23 %) and secondary charring reactions—information missed by CA. Overall, model selection strongly influences thermodynamic interpretation, and the ETA is validated as the superior approach for designing and optimizing pyrolysis of complex, extractive-rich, and non-extractive feedstocks.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"123 ","pages":"Article 102333"},"PeriodicalIF":6.2,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323689","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}

{"title":"Physicochemical properties and carbon dioxide gasification reactivity analysis of lignin and lignite co-pyrolysis char","authors":"Chunfu Yun ,&nbsp;Kai Kong ,&nbsp;Yanpeng Ban ,&nbsp;Huacong Zhou ,&nbsp;Jianxiu Hao ,&nbsp;Na Li ,&nbsp;Keduan Zhi ,&nbsp;Yunfei Wang ,&nbsp;Quansheng Liu","doi":"10.1016/j.joei.2025.102337","DOIUrl":"10.1016/j.joei.2025.102337","url":null,"abstract":"<div><div>Co-gasification of biomass with coal enables more efficient utilization of carbon resources and reduces greenhouse gas emissions. In this study, the isothermal CO₂ gasification behavior of lignin/Manglai lignite co-pyrolysis char was investigated at 900–1100 °C using a thermogravimetric analyzer and a fixed-bed reactor. The structural characteristics of co-pyrolysis char were analyzed by N₂ adsorption-desorption, scanning electron microscopy, Raman spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray fluorescence spectroscopy. The results show that the degree of graphitization of co-pyrolysis char is higher than that of lignin and lignite char. Additionally, the morphology of the internal minerals in the char changes during the gasification process, resulting in a significant reduction in gasification reactivity. The gasification reactivity of lignin/Manglai lignite (LLC) co-pyrolysis char is lower than that of single lignin char, and its maximum CO formation rate and gas accumulation are the lowest at 1100 °C pyrolysis temperature. These findings highlight the influence of pyrolysis temperature on char structure and gasification performance, and provide valuable insights for optimizing the co-gasification process and improving CO₂ utilization efficiency. This study provides new insights into the gasification behavior of lignin–lignite mixtures and offers practical implications for sustainable energy utilization.</div></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"123 ","pages":"Article 102337"},"PeriodicalIF":6.2,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323687","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}