Biomass Conversion and Biorefinery
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2025
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IF 4.1
Li Wangliang,Fang Yi,Chang Shengqiang,Mi Shuzhen,Zhao Shengyong
Co-gasification of biomass and coal offers a strategic approach to enhance the sustainability of energy resources by exploiting the inherent synergies between various biomass components (cellulose, hemicellulose, and lignin) and coal. This study investigates the co-gasification in a downdraft fixed-bed reactor, focusing on the impacts on gas yield, calorific value, and carbon structure transformations. Thermogravimetric analysis revealed parameter-specific effects of biomass components during gasification. At a 50 wt% blending ratio, cellulose significantly enhances gasification, increasing calorific value and CO production beyond theoretical predictions. In contrast, lignin inclusion at a 70 wt% ratio decreases the calorific value and CO production by 6.44% and 11.21%, respectively. Additionally, hemicellulose is found to catalytically enhance CO 2 conversion, with a maximum increase of 45.99% at a 70 wt% ratio. The study elucidates the differential impacts of each biomass component on the co-gasification process and underscores the potential of optimizing biomass blends to maximize the efficiency and sustainability of energy production.
研究领域:
能源科学
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化学工程
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DOI
高影响因子
Journal of Cleaner Production
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2020
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IF 7.246
Liping Wang,Yuzhi Chang,Xuejing Zhang,Fan Yang,Yao Li,Xinran Yang,Shaogang Dong
Hydrothermal carbonization has proven to be an effective method to convert sewage sludge into solid carbon-rich hydrochar , of which the high ash content is generally regarded as limiting factor for energy-related potential application. Hydrothermal co-carbonization of sewage sludge and high concentration phenolic wastewater was firstly investigated in this study as a scenario for production of clean solid biofuel with increased calorific value and decreased ash content, by means of polycondensation reactions between phenols and highly reactive intermediates of biopolymers in sewage sludge. Results showed that addition of phenolic wastewater into sewage sludge led to a substantial increase of hydrochar yield (1.83–31.11%) and higher heating value (1.01–10.01%) and a remarkable decrease of ash content (1.39–25.68%). The reaction temperature and residence time had a complicated impact on the contribution of phenol to hydrochar production. An increase in phenol mixing ratio was beneficial to the improvement of mass yield and higher heating value but showed a less influence on the reduction of ash content. The synergistic effects between phenols and sewage sludge on the production of solid biofuel were closely related to the phenolic species, which followed the order in the aspects of hydrochar yield increase and ash content decrease: phloroglucinol > p -nitrophenol > m -cresol > phenol. The changes of phenols content in liquid phase and variations of functional groups in hydrochars implied that phenols interacted with sewage sludge and incorporated into hydrochars during the hydrothermal co-carbonization. TG-DSC confirmed the improved combustion reactivity of the phenols-sludge-derived hydrochars.
研究领域:
环境科学
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能源工程
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DOI
高影响因子
Journal of Biobased Materials and Bioenergy
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2024
·Vol. 18
·期 3
·386-394
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IF 0.5
He Ailing,Sun Tanglei,Wang Ruisi,Zhang Lu,Yang Yantao,Wu Qigang,Liu Peng,Lei Tingzhou
The accurate measurement of the biomass lower-calorific-value-based blending ratio (BLBR) is the premise and key to scale development of the power generation technology from co-firing of biomass and coal. However, existing determination methods of BLBR are less accurate, which has impeded
the scale utilization of the co-firing technology of biomass and coal. To accurately determine the BLBR, this research proposed a flue gas sampling system suitable for determining BLBR through 14C quantitative analysis and established a medium-scale experimental platform for BLBR
determination. In addition, predictive models for the lower calorific values of coal and biomass fuels were built and the BLBR calculation model for co-firing power plants was deduced. Furthermore, experimental verification of the BLBR determination was also conducted. The results show that
the lower calorific values of coal and biomass fuels are highly linearly positively correlated with the carbon content. The relative errors of the established prediction models for lower calorific values of biomass and coal are separately lower than 5% and 8%. The results indicate that the
proposed BLBR determination method is accurate.
研究领域:
能源与环境工程
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可再生能源
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jie Gao,Yang Cao,Yitian Zhang,Gang Luo,Jiajun Fan,James H. Clark,Shicheng Zhang
The inherent structural rigidity of lignin poses a significant challenge to its direct hydrogenation to produce aromatic compounds, requiring harsh reaction conditions. In this study, microwave-assisted hydrothermal liquefication was employed to rapidly generate raw bio-oil under mild conditions, coupled with an in-situ hydrogenation strategy to upgrade its quality. A series of lignin substrates were characterized to establish the relationship between lignin characteristics and aromatic products. Grass lignin can produce low molecular weight bio-oil in high yields (50.4–60.7 %) within 30 min at 180 °C, which is attributed to the abundance of cleavable β-O-4 linkages in its uniform structure. In contrast, softwood lignin with abundant guaiacyl (G) units possessed a robust thermal stability, resulting in a low monomer yield, but a high selectivity to G-type products (97 %). The raw bio-oil was further upgraded through in-situ hydrogenation with Pd catalysts. Low reaction temperatures (60–100 °C) favored the hydrogenation of aromatic aldehydes and ketones to their alcohol products, while high temperatures (100–220 °C) promoted the deep hydrogenation of aromatic side chains to alkyl products. Besides, an upgraded bio-oil with a higher heating value (29.8 MJ/kg) was obtained. Furthermore, the hydrogenation mechanism was investigated through the kinetics of simulated bio-oils. The activation energy follows the order: dimer β-O-4 linkage < monomer aldehyde group < ketone group < C C linkage, which is consistent with the hydrogenation kinetics observed in real lignin bio-oil. Overall, this study highlights the impact of lignin characteristics on subsequent conversion and also enhances our understanding of the complex depolymerization/hydrogenation mechanisms during lignin upgrading.
研究领域:
化学工程
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生物能源
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催化
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可再生能源
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DOI
高影响因子
ENERGY & FUELS
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2024
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IF 5.2
Fanhui Liao,Yanchang Chu,Donghai Xu,Le Yang
Co/CeO2 catalysts with different morphologies of polyhedrons (Co/CeO2–P), rods (Co/CeO2–R), sheets (Co/CeO2–S) and cubes (Co/CeO2–C) were prepared and compared on the catalytic upgrading of hydrothermal liquefied (HTL) biocrude derived from municipal sewage sludge (MSS) to biofuel. The best quality biofuel was achieved on Co/CeO2–C with a higher heating value (HHV) of 39.10 MJ/kg, where the sulfur and oxygen contents were reduced to 0.007 and 9.19 wt %, while the carbon and hydrogen contents were elevated to 77.5 and 10.1 wt %, respectively. In contrast, the pure ceria support presented a slight improvement for the upgrading of biocrude. Overall, this work provides a feasible solution for high-value utilization of MSS to produce high-grade biofuel.
研究领域:
环境科学
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化学工程
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能源技术
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催化
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DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2019
·Vol. 93
·期 1
·111-122
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IF 1.986
Wang Yinfeng,Li Zhi,Huber Lukas,Wu Xiaoxu,Huang Siqi,Zhang Yan,Huang Rui,Liu Qiong
Reducing organic groups on hydrophobic silica aerogels (SA) is worth exploring for lowering their thermal hazard risk. In this work, we used dimethyldichlorosilane (DMDCS) to modify silica alcogels, investigated the effects of DMDCS concentration and focused on the thermal hazard assessment of the DMDCS modified SA (DSA). It was turned out that the DSA had less −CH 3 content in spite of the thermal stability close to the trimethylchlorosilane modified SA (TSA), about 240 °C. The kinetics study suggested the apparent activation energy ( E a ) could be divided into two segments, corresponding to the two processes in the pyrolysis. The positive enthalpy and entropy changes indicated that the thermal oxidation of the DSA was an exothermic reaction, which could not occur without external energy supply. The average E a of the DSA was far larger than that of the TSA and the gross calorific value of the DSA decreased by about 12% compared with that of the TSA. All these results drew a conclusion that the DMDCS modified SA reduced the thermal hazard to some degree, which provided one possible solution to further lower the thermal hazard of hydrophobic SA.
研究领域:
材料科学
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化学工程
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热物理
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DOI
高影响因子
FUEL
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2019
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IF 5.128
Longfei Tang,Songjiang Chen,Dongjiao Gui,Xiangnan Zhu,Huan He,Xiuxiang Tao
The present work investigated the effect of efficient reduction desulfurization method (potassium tertbutoxide and hydrosilane system) on coal properties. Characteristic changes of high organic sulfur coal were studied utilizing TGA, FTIR and XPS after desulfurization. Results showed that more than 60% organic sulfur was removed, while the calorific value of coal samples decreased slightly and the aromatics in coal macromolecular structure were destroyed little. After treatment, formation of low molecular fragments from aliphatic carbons leaded to the increase of mass loss in TGA. XPS results revealed that some oxygen-containing groups were deoxidized after reduction treatment. The changes of coal properties were mainly attributed to the fracture of branch chain, the reduction of oxidized carbon atoms and side reactions during reduction desulfurization.
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Energetic Materials
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2025
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IF 1.9
Ramzi Makaoui,Oussama Mehelli,Mehdi Derradji,Annis Mahdi Yousfi,Mohammed Kaufa,Djallel Eddine Tria,Larbi Hemmouche,Djamel Belmehdi,Abdelmalek Habes
This study explores the effect of graphene oxide (GO) nanosheets on the mechanical and energetic performance of polytetrafluoroethylene/aluminium (PTFE/Al) reactive composites for shielding applications. PTFE/Al mixtures with varying GO content (0–3%) were experimentally and numerically analysed. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) indicated improved PTFE crystallinity and thermal stability with GO addition. Calorimetric bomb tests revealed a 13% increase in calorific power at 3% GO content. EXPLO5 modelling showed higher enthalpy and combustion heat under isobaric conditions but reduced energy release under isochoric conditions, suggesting a more condensed reaction. Scanning electron microscopy (SEM) confirmed uniform dispersion of Al and GO within a fibrous PTFE matrix. Compression and split Hopkinson pressure bar (SHPB) tests demonstrated enhanced stiffness, toughness, and energy absorption. This work reveals the dual role of GO, combining graphene’s lightweight, high-performance structure with reactive oxygen functional groups, investigated through both experimental andcomputational methods.
研究领域:
材料科学
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纳米技术
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聚合物复合材料
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机械工程
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热分析
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计算建模
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）