Stability of Co-Ce-Mn mixed-oxide catalysts for CO preferential oxidation in H2-rich gases

被引：30
作者：
Guo, Qiang [1 ]
Chen, Shunquan [1 ]
Liu, Yuan [1 ]
Wang, Yaquan [1 ]
机构：
[1] Tianjin Univ, Sch Chem Engn & Technol, Tianjin Key Lab Appl Catalysis Sci & Engn, Tianjin 300072, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2010年 / 165卷 / 03期
关键词：
Carbon monoxide; Preferential oxidation; Deactivation; Carbon dioxide; Cobalt; Ceria; Manganese; Oxidation state; LOW-TEMPERATURE OXIDATION; CARBON-MONOXIDE; CO3O4; CATALYSTS; H-2; PERFORMANCE; HYDROGEN; OXYGEN;
D O I：
10.1016/j.cej.2010.10.029
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The stability of Co-Ce-Mn mixed-oxide catalysts for CO preferential oxidation in H-2-rich gases was investigated. The deactivation mechanism was explored using Fourier-transform infrared spectroscopy (FTIR), temperature-programmed desorption (TPD), and reduction and oxidation techniques. The deactivation of the catalysts was observed in reaction gas streams containing CO2. FTIR and CO2-TPD revealed carbonate formation in the deactivated samples. The activity of the deactivated catalysts could be partially regenerated by CO2 desorption and fully regenerated by oxidation treatment which led to a change in the oxidation state of cobalt ions. It is proposed that both carbonate accumulation and the change in the oxidation state of cobalt ions during CO preferential oxidation are responsible for the deactivation of Co-Ce-Mn catalysts. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：846 / 850
页数：5
相关论文
共 33 条
[1]   Selective CO oxidation over CuO-CeO2 catalysts prepared via the urea-nitrate combustion method [J].
Avgouropoulos, G ;
Ioannides, T .
APPLIED CATALYSIS A-GENERAL, 2003, 244 (01) :155-167
[2]   A comparative study of ceria-supported gold and copper oxide catalysts for preferential CO oxidation reaction [J].
Avgouropoulos, George ;
Papavasiliou, Joan ;
Tabakova, Tatyana ;
Idakiev, Vasko ;
Ioannides, Theophilos .
CHEMICAL ENGINEERING JOURNAL, 2006, 124 (1-3) :41-45
[3]   FOURIER-TRANSFORM INFRARED STUDY OF THE SURFACE-PROPERTIES OF COBALT OXIDES [J].
BUSCA, G ;
GUIDETTI, R ;
LORENZELLI, V .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1990, 86 (06) :989-994
[4]   Preparation and characterization of a higher cobalt oxide [J].
Christoskova, S ;
Stoyanova, M ;
Georgieva, M ;
Mehandjiev, D .
MATERIALS CHEMISTRY AND PHYSICS, 1999, 60 (01) :39-43
[5]   INFLUENCE OF DRY OPERATING-CONDITIONS - OBSERVATION OF OSCILLATIONS AND LOW-TEMPERATURE CO OXIDATION OVER CO3O4 AND AU/CO3O4 CATALYSTS [J].
CUNNINGHAM, DAH ;
KOBAYASHI, T ;
KAMIJO, N ;
HARUTA, M .
CATALYSIS LETTERS, 1994, 25 (3-4) :257-264
[6]   CHEMICAL-DYNAMICS IN SURFACE-REACTIONS [J].
ERTL, G .
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1982, 86 (05) :425-432
[7]   Development of a lab scale catalytic metal plate-channels reactor for CO preferential oxidation [J].
Galletti, C. ;
Specchia, S. ;
Saracco, G. ;
Specchia, V. .
CHEMICAL ENGINEERING JOURNAL, 2009, 154 (1-3) :246-250
[8]   Low temperature oxidation of carbon monoxide:: the influence of water and oxygen on the reactivity of a Co3O4 powder surface [J].
Grillo, F ;
Natile, MM ;
Glisenti, A .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2004, 48 (04) :267-274
[9]   MnOx modified Co3O4-CeO2 catalysts for the preferential oxidation of CO in H2-rich gases [J].
Guo, Qiang ;
Liu, Yuan .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2008, 82 (1-2) :19-26
[10]   Mesoporous CeO2-supported Co3O4 catalysts for CO preferential oxidation in H2-rich gases [J].
Guo Qiang ;
Wu Meiling ;
Liu Yuan ;
Bai Xue .
CHINESE JOURNAL OF CATALYSIS, 2007, 28 (11) :953-957
1234