Effects of various pyrolysis temperatures on the physicochemical characteristics of crop straw-derived biochars and their application in tar reforming
文献类型: 外文期刊
第一作者: Zhang, Li
作者: Zhang, Li;Zhao, Lixin;Li, Zhihe;Yi, Weiming;Fu, Peng;Yu, Fangyong;Zhang, Li;Yao, Zonglu;Zhao, Lixin;Jia, Jixiu;Zhao, Yanan
作者机构: Shandong Univ Technol, Sch Agr Engn & Food Sci, Zibo 255000, Peoples R China;Shandong Univ Technol, Sch Chem & Chem Engn, Zibo 255000, Peoples R China;Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
关键词: Biomass; Physicochemical characteristics; Pyrolysis temperature; Catalytic performance; Tar reforming
期刊名称:CATALYSIS TODAY ( 2022影响因子:5.3; 五年影响因子:5.4 )
ISSN: 0920-5861
年卷期: 2024 年 433 卷
收录情况: SCI
摘要: As a by-product of the rapid pyrolysis of biomass, biochar not only plays an important role in the biomass conversion process but also holds significant potential value in the catalytic conversion field. This study aimed to evaluate the physicochemical properties changes of biochars at different pyrolysis temperatures and their potential application in tar reforming. Biochars derived from three feedstocks of maize straw (MS), rice husk (RH), and cotton straw (CS) were achieved by fast pyrolysis within a broad temperature range of 300-900 degrees C, respectively. The results showed that the pyrolysis temperature exerted a pronounced influence on the structural characteristics of biochar. With increasing temperature, the H/C and O/C ratios progressively decreased, accompanied by a significant reduction in oxygen-containing structures. In addition, elevated pyrolysis temperatures contributed favorably to the formation of the crystalline structure of biochar. Raman analysis unveiled a correlation between the fused aromatic ring system and H/C ratios, validating the aromatization progress of biochar. In the tar catalytic reforming process, the three representative biochars, under the effect of MS-600 (standing for MS biochar derived at 600 degrees C), RH-600, and CS-600 catalysts, exhibited outstanding catalytic performance with tar conversion efficiencies of 73.26%, 68.51%, and 71.43%, respectively. This study provided systematic support for the high-value use of biochar from crop straw.
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