文献类型：期刊文献

英文题名：Effect of K and Na-based catalysts on the structure of coal char during gasification reactions

作者：Liu, Zhuoran[1];Wei, Bing[1];Zhang, Binbin[1];Song, Xudong[2];Li, Ping[2];Wang, Jiancheng[3];Wang, Xingjun[1];Guo, Qinghua[1];Yu, Guangsuo[1];Wang, Fuchen[1]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai Engn Res Ctr Coal Gasificat, State Key Lab Coal Liquificat Gasificat & Utilizat, POB 272, Shanghai 200237, Peoples R China;[2]Ningxia Univ, Yinchuan 750021, Ningxia, Peoples R China;[3]Taiyuan Univ Technol, Taiyuan 030024, Peoples R China

年份：2025

卷号：399

外文期刊名：FUEL

收录：;EI(收录号：20252118449524);WOS:【SCI-EXPANDED(收录号:WOS:001502077300004)】；

基金：The authors gratefully acknowledge the National Natural Science Foundation of China (U21A20319) . The experiment was assisted by Analytical and Testing Center and Wally Feringa Nobel Prize Scientist Joint Research Center in East China University of Science and Technology.

语种：英文

外文关键词：Binary catalysts; Catalytic gasification; Coal char; Carbon structure; FIB-SEM

摘要：Coal structure is the main factor determining the reactivity and reaction behavior of coal in thermal conversion processes such as gasification. In this study, the impact of amount of unitary catalyst and two-component alysts on the CO2 gasification reactions of coal char and temperature variability on the coal gasification reaction were investigated. To this end, detailed analysis of the prepared samples was performed, and the samples different reaction times were characterized. High temperature stage microscopy (HTSM) was used to investigate the effect of catalyst loading on the reactivity. The gasification reaction of coal char was carried out using bed. The evolution of the carbon structure and organic functional groups of the coal char at the beginning gasification (0-15 min) was investigated using Raman spectroscopy and Fourier transform infrared spectroscopy. And the elemental distribution was investigated by using FIB in combination with SEM and The results showed that the carbon conversion and gasification reaction rate of coal char increased with addition of K2CO3 loading at a constant gasification temperature. The loaded catalyst could reduce the itization of coal char during the gasification reaction, and the binary catalyst reduced the graphitization char more strongly. The addition of Na2CO3 promoted the cleavage of bridge bonds and aliphatic C-H bond the aromatic skeleton structures. At the same time, the binary catalyst resulted in a more uniform distribution K and Na.