文献类型：期刊文献

英文题名：Effect of corn stalks on coal catalytic hydrogasification in a pressurized fluidized bed for manufacturing CH4

作者：Yan, Shuai[1,2];Feng, Jun[3];Xia, Zihong[4];Huang, Yingying[1,2];Han, Fengshuang[1,2];Qu, Xuan[3];Bi, Jicheng[3]

机构：[1]Ningbo Univ Technol, Sch Mat & Chem Engn, Ningbo 315211, Peoples R China;[2]Tianjin Univ, Zhejiang Inst, Ningbo 315201, Zhejiang, Peoples R China;[3]Chinese Acad Sci, Inst Coal Chem, Natl Key Lab High Efficiency & Low Carbon Utilizat, Taiyuan 030001, Peoples R China;[4]East China Univ Sci & Technol, Dept Energy Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：358

外文期刊名：FUEL

收录：;EI(收录号：20234314945386);WOS:【SCI-EXPANDED(收录号:WOS:001096967400001)】；

基金：The authors gratefully acknowledge financial support from A Project Supported by Scientific Research Fund of Zhejiang Provincial Education Department (Y202250270) , the Key research and development project of Shanxi Province (202102090301029) , and the National Natural Sci- enceFoundation of China (22308170) .

语种：英文

外文关键词：Coal gasification; Catalytic hydrogasification; Coal/biomass co -gasification; Methane; Pressurized fluidized bed

摘要：Coal catalytic hydrogasification (CCHG) is a straightforward approach for producing substituted natural gas with a high CH4 yield and thermal efficiency. To reduce fossil fuel consumption for CH4 manufacturing, this work proposed a integrated process combining CCHG and biomass hydrogasification. Using a pressurized fluidized bed, the effect of corn stalks (CS) on CCHG was carefully analyzed in terms of product formation behavior, catalysis process, and feedstock adaptability. Experimental results showed that CS benefits CCHG in terms of reactivity, CH4 production, and CO2 emissions. Specifically, adding 30 wt% CS resulted in a maximum CH4 formation rate of 94.9 ml/g & sdot;min, production capacity of 1.38 Nm3 CH4/kg coal, and CO2 emissions of 26.37 g/ mol CH4, which were 2.25, 1.29, and 0.69-folds that of cobalt-catalyzed hydrogasification alone, respectively. In the rapid pyrolysis stage, CS volatiles promoted Co dispersion and restrained coal structure ordering by medi-ating the interactions between cobalt catalysts and coal, favoring the subsequent hydrogasification. Meanwhile, the cobalt-containing char catalyzed methanation of CS-pyrolyzed volatiles, increasing CH4 formation while decreasing CO, CO2, C2-C3, and tar yields. In the gasification stage, Ca and Mg compounds in biomass ash gradually promoted the catalytic hydrogasification of coal char via potential Lewis basic-acid interactions. These mutual behaviors of CS and catalyst-containing coal were found to be universal in hydrogasification and helped strengthen cheaper but less active Fe/Ni catalysts. This work will provide theoretical guidance for future research on the production of CH4 with a low carbon footprint via co-hydrogasification of biomass and coal.