文献类型：期刊文献

英文题名：Effect of sodium species with different modes of occurrence on corrosion behavior of high-chromia refractory for entrained-flow gasifier linings

作者：Gao, Jinghong[1,2];Su, Weiguang[1];Gong, Yan[2];Chen, Jian[2];Wang, Xingjun[2];Song, Xudong[1];Xu, Guangyu[3];Yu, Guangsuo[1,2]

机构：[1]Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High Efficiency Utilizat Coal & Gree, Yinchuan 750021, Peoples R China;[2]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[3]Shandong Yancon Guotuo Sci & Engn Co Ltd, Zoucheng 273500, Peoples R China

年份：2026

卷号：406

外文期刊名：FUEL

收录：;EI(收录号：20254419405625);WOS:【SCI-EXPANDED(收录号:WOS:001600399300009)】；

基金：The authors gratefully acknowledge financial support from the Na-tional Natural Science Foundation of China (Grant No. U21A20318, U21A2059) and the Shanghai Rising-Star Program (Grant No. 21QA1402300) .

语种：英文

外文关键词：Gasification; Zhundong coal; Sodium species; Refractory lining; Corrosion

摘要：Proven reserves of Zhundong Coal (ZDC) are abundant, but its sodium-rich characteristics pose significant challenges to the safety of gasification equipment. This study is the first to comprehensively investigate the liquid-phase and gas-phase corrosion mechanisms of sodium species, focusing on water-soluble and organic sodium in ZDC. The effects of these sodium species on high-chromia refractory linings used in entrained-flow gasifiers were examined by simulating the behavior of common sodium-based components. The results revealed that corrosion behaviors differ significantly between liquid-phase and gas-phase sodium species. Liquid-phase corrosion severity followed the order: L-NaCl > L-NaOH > L-Na2SO4 > L-Na2CO3 > L-NaAc, while gas-phase corrosion impact ranked as: G-Na2CO3 > G-Na2SO4 > G-NaOH > G-NaAc > G-NaCl. Notably, organic sodium (NaAc) contributed significantly to the formation of protective spinel layers, while water-soluble sodium (especially Na2CO3 and Na2SO4) played a critical role in the deep permeation and corrosion of refractory materials. In contrast, gas-phase organic sodium primarily induced partial dissolution of the aggregate and matrix, compromising structural integrity. These findings provide a theoretical basis for understanding the corrosion behavior of refractory materials in the ZDC gasification process and their interactions with sodium.