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Effect of titania addition on the performance of CoMo/Al2O3 sour water gas shift catalysts under lean steam to gas ratio conditions

Effect of titania addition on the performance of CoMo/Al2O3 sour water gas shift catalysts under lean steam to gas ratio conditions
Effect of titania addition on the performance of CoMo/Al2O3 sour water gas shift catalysts under lean steam to gas ratio conditions
Activated carbon honeycomb supported manganese and cerium oxides (MnOx–CeO2/ACH) catalysts were investigated for selective catalytic reduction (SCR) of NO at low temperatures of 80–200 °C. Compared with ACH supported manganese oxide catalyst (MnOx/ACH), MnOx–CeO2/ACH catalysts show much higher SCR activity and higher selectivity to N2. NO conversion can be improved by the addition of CeO2 from less than 50% to 100% at 80–160 °C. The N2 selectivity of higher than 99.8% is obtained over the Ce(1)Mn/ACH catalyst at 80–200 °C. Results indicate that the addition of CeO2 improves the distribution of MnOx and enhances the oxidation of NO to NO2, producing more absorbed NO3– on the catalyst surface, which is then reduced into N2 by NH3. These behaviors account for the promoting effect of CeO2 on the SCR activity.
0888-5885
11674-11680
Liu, Bonan
aee83a08-ec61-43b1-a1c4-219d50c0df28
Zong, Qiuyun
f475a19a-da5c-42fc-b94b-fe5328b9c684
Edwards, Peter P.
1c8ab595-549c-4dca-b911-a46a94183e2b
Zou, Fei
03400880-0ca1-48f1-8bf7-d6f1df747ac9
Du, Xian
d2b18f3e-f36c-42e4-b42d-33a1ed22b5b5
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Xiao, Tiancun
90161b4f-4483-4b4f-8db6-6614b001ac54
AlMegren, Hamid
381ca6b7-98d6-4621-966c-c67b3e094f8a
Liu, Bonan
aee83a08-ec61-43b1-a1c4-219d50c0df28
Zong, Qiuyun
f475a19a-da5c-42fc-b94b-fe5328b9c684
Edwards, Peter P.
1c8ab595-549c-4dca-b911-a46a94183e2b
Zou, Fei
03400880-0ca1-48f1-8bf7-d6f1df747ac9
Du, Xian
d2b18f3e-f36c-42e4-b42d-33a1ed22b5b5
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Xiao, Tiancun
90161b4f-4483-4b4f-8db6-6614b001ac54
AlMegren, Hamid
381ca6b7-98d6-4621-966c-c67b3e094f8a

Liu, Bonan, Zong, Qiuyun, Edwards, Peter P., Zou, Fei, Du, Xian, Jiang, Zheng, Xiao, Tiancun and AlMegren, Hamid (2012) Effect of titania addition on the performance of CoMo/Al2O3 sour water gas shift catalysts under lean steam to gas ratio conditions Industrial & Engineering Chemistry Research, 51, (36), pp. 11674-11680. (doi:10.1021/ie300555f).

Record type: Article

Abstract

Activated carbon honeycomb supported manganese and cerium oxides (MnOx–CeO2/ACH) catalysts were investigated for selective catalytic reduction (SCR) of NO at low temperatures of 80–200 °C. Compared with ACH supported manganese oxide catalyst (MnOx/ACH), MnOx–CeO2/ACH catalysts show much higher SCR activity and higher selectivity to N2. NO conversion can be improved by the addition of CeO2 from less than 50% to 100% at 80–160 °C. The N2 selectivity of higher than 99.8% is obtained over the Ce(1)Mn/ACH catalyst at 80–200 °C. Results indicate that the addition of CeO2 improves the distribution of MnOx and enhances the oxidation of NO to NO2, producing more absorbed NO3– on the catalyst surface, which is then reduced into N2 by NH3. These behaviors account for the promoting effect of CeO2 on the SCR activity.

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Published date: 12 September 2012
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 352795
URI: http://eprints.soton.ac.uk/id/eprint/352795
ISSN: 0888-5885
PURE UUID: 644cd3ec-76e9-4014-92e7-3d990a1b4df7
ORCID for Zheng Jiang: ORCID iD orcid.org/0000-0002-7972-6175

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Date deposited: 21 May 2013 11:32
Last modified: 18 Jul 2017 04:11

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Contributors

Author: Bonan Liu
Author: Qiuyun Zong
Author: Peter P. Edwards
Author: Fei Zou
Author: Xian Du
Author: Zheng Jiang ORCID iD
Author: Tiancun Xiao
Author: Hamid AlMegren

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