Roles of lattice oxygen in V2O5 and activated coke in SO2 removal over coke-supported V2O5 catalysts

被引：48

作者：

Xiao, Yong ^{[1
,2
]}

Liu, Qingya ^{[3
]}

Liu, Zhenyu ^{[1
,3
]}

Huang, Zhanggen ^{[1
]}

Guo, Yanxia ^{[1
]}

Yang, Jianli ^{[1
]}

机构：

[1] Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

[3] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2008年 / 82卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

V2O5; pore size distribution; lattice oxygen; SO2; removal;

D O I：

10.1016/j.apcatb.2008.01.004

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This paper systematically investigates the roles of lattice oxygen in V2O5 and activated coke over coke-supported V2O5 catalysts in SO2 removal process at 200 degrees C. The results show that one SO2 molecule reacts with one O atom in a surface V2O5 molecule to form an intermediate (a VOSO4-like structure), which then reacts with gaseous O-2 to form sulfur species (SO3 or H2SO4 in the presence of H2O) and V2O5. The SO3/H2SO4 migrates over the coke surface and stores in the pores in the vicinity Of V2O5 sites. Mineral matters, oxygen and nitrogen species in the activated coke are unfavorable to migration of SO3/H2SO4. The pores effective for storage of SO3/H2SO4 are those less than 1 nm in size. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：114 / 119

页数：6

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