Oxidation of NO over cobalt oxide supported on mesoporous silica

被引：29

作者：

Huang, Yan ^{[1
]}

Gao, Dongmei ^{[1
]}

Tong, Zhiquan ^{[1
]}

Zhang, Junfeng ^{[1
]}

Luo, He ^{[1
]}

机构：

[1] Xiangtan Univ, Dept Environm Sci & Engn, Xiangtan 411105, Hunan, Peoples R China

来源：

JOURNAL OF NATURAL GAS CHEMISTRY | 2009年 / 18卷 / 04期

关键词：

catalytic oxidation; NO; Co3O4/mesoporous silica; H2O; SO2; SELECTIVE CATALYTIC-REDUCTION; SULFATED ZIRCONIA CATALYSTS; NITROGEN MONOXIDE; SCR; DECOMPOSITION; AMMONIA; ACIDITY; WATER; SO2; H2O;

D O I：

10.1016/S1003-9953(08)60135-8

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Cobalt oxide catalysts supported on mesoporous silica (Co3O4/MPS) were prepared, characterized and applied for catalytic oxidation of NO. Effects of catalyst supports, calcination temperatures, H2O and SO2 on NO conversion were investigated. The samples were also characterized by BET, XRD, FTIR and TG/DTG. The results suggested that Co3O4/MPS catalyst calcined at 573 K had the smallest crystal particles and the best Surface dispersion. This catalyst had the highest activity and yielded 82% NO conversion at 573 K, at a space velocity of 12000 h(-1). Although the conversion of NO decreased with the introduction of H2O, it could be restored completely after removing residual H2O from Co3O4/MPS catalyst by heating at 573 K. In the presence of SO2, the oxidation activity decreased and CoSO4 was detected on the catalyst. The NO conversion decreased to 30.2% in the presence of SO2 and H2O. It could not be restored completely after cutting off H2O and SO2. The deactivation of the catalyst in the presence of SO2 and H2O was attributed to the formation of cobalt sulfate species.

引用

页码：421 / 428

页数：8

共 42 条

[11] Inhibition effect of H2O on V2O5/AC catalyst for catalytic reduction of NO with NH3 at low temperature
Huang, ZG
Liu, ZY
Zhang, XL
Liu, QY
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 63 (3-4) : 260 - 265
[12] Co3O4 based catalysts for NO oxidation and NO, reduction in fast SCR process
Irfan, Muhammad Faisal
Goo, Jeong Hoi
Kim, Sang Done
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2008, 78 (3-4) : 267 - 274
[13] Low-temperature NOx removal for flue gas cleanup
Jang, BWL
Spivey, JJ
Kung, MC
Kung, HH
[J]. ENERGY & FUELS, 1997, 11 (02) : 299 - 306
[14] Novel promoting effect Of SO2 on the selective catalytic reduction of NOx by ammonia over CO3O4 catalyst
Ke, Rul
Li, Junhua
Liang, Xi
Hao, Jiming
[J]. CATALYSIS COMMUNICATIONS, 2007, 8 (12) : 2096 - 2099
[15] Urea-SCR:: a promising technique to reduce NOx emissions from automotive diesel engines
Koebel, M
Elsener, M
Kleemann, M
[J]. CATALYSIS TODAY, 2000, 59 (3-4) : 335 - 345
[16] Outstanding low temperature HC-SCR of NOx over platinum-group catalysts supported on mesoporous materials expecting diesel-auto emission regulation
Komatsu, Tamikuni
Tomokuni, Keizou
Yamada, Issaku
[J]. CATALYSIS TODAY, 2006, 116 (02) : 244 - 249
[17] The effect of water on the acidity of TiO2 and sulfated titania
Kulkarni, AP
Muggli, DS
[J]. APPLIED CATALYSIS A-GENERAL, 2006, 302 (02) : 274 - 282
[18] Preparation, thermoanalytical and IR study of mixed-ligand complexes formed in water-1,2-ethanediol-cobalt(II)sulfate systems
Labádi, I
Horváth, L
Kenessey, G
Liptay, G
[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2006, 83 (01) : 247 - 251
[19] The effect of H2O on the reduction of SO2 and NO by CO on La2O2S
Lau, Ngai T.
Fang, Ming
Chan, Chak K.
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2008, 79 (02) : 110 - 116
[20] Surface structure and catalytic performance of CuCl/SiO2-Al2O3 catalysts for methanol oxidative carbonylation
Li Zhong
Meng Fanhui
Ren Jun
Zheng Huayan
Xie Kechang
[J]. CHINESE JOURNAL OF CATALYSIS, 2008, 29 (07) : 643 - 648

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