文献类型：期刊文献

英文题名：Study on the mechanism of sulfur poisoning in toluene catalyzed by Co₃O₄/γ-Al₂O₃ sulfur tolerant catalyst containing spinel structure

作者：Jiang, Baishun[1];Xie, Kaiyuan[1];Wang, Zhuo[1];Ning, Hanqi[1];Zuo, Shufeng[1];Li, Jing[2]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Liaocheng Univ, Coll Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Shandong, Peoples R China

年份：2023

卷号：11

期号：5

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001141197500001)、、EI(收录号：20232814378246)、Scopus(收录号：2-s2.0-85164220699)、WOS

基金：This work was supported by the Opening Foundation of Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process (No. jxhxpctgytdjs2304) , Zhejiang Public Welfare Technology Research Project (No. LGG19B070003) , the National Natural Science Foundation of China (No. 21577094, 21902069) .

语种：英文

外文关键词：Sulfur tolerance; Sulfur poisoning mechanism; Toluene; Catalytic combustion

外文摘要：In this paper, in-situ thermal decomposition of ammonium sulfate method was used to cause sulfur poisoning of Co3O4/gamma-Al2O3 catalyst rapidly and quantitatively. The pore structure, valence state of active species, surface morphology and acidity of the catalyst before and after sulfur poisoning were characterized, and its influence on catalytic combustion of toluene was studied. The results showed the crystal shape of the catalyst changed little after sulfur poisoning. As sulfur poisoning gradually deepened, the formation of sulfate blocked the pores, the high-valence cobalt decreased, strong acid sites increased, and its catalytic activity for toluene combustion gradually decreased. Formation of cobalt sulfate was a main reason for the decline in catalyst activity. Spinel phase CoAl2O4 formed outside gamma-Al2O3 framework can adsorb a large amount of sulfur species to form sulfate, protecting Co3O4 and delaying the deactivation of catalysts.