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Frontiers of Chemical Science and Engineering

ISSN 2095-0179

ISSN 2095-0187(Online)

CN 11-5981/TQ

Postal Subscription Code 80-969

2018 Impact Factor: 2.809

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Front Chem Sci Eng    2012, Vol. 6 Issue (1) : 34-37    https://doi.org/10.1007/s11705-011-1163-3
RESEARCH ARTICLE
Synthesis and properties of PdO/CeO2-Al2O3 catalysts for methane combustion
Xianyun LIU(), Jianzhou LIU, Feifei GENG, Zhanku LI, Ping LI, Wanli GONG
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
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Abstract

This study focuses on the loading of catalytic materials, e.g., palladium on the surface of supporting materials, with the aim to obtain catalysts with high activity for methane combustion. The catalyst PdO/CeO2-Al2O3 was prepared by impregnation under ultrasonic condition. The effect of different activation methods on the activity of catalysts for methane catalytic combustion was tested. The properties of reaction and adsorption of oxygen species on catalyst surface were characterized by H2-temperature programmed reduction (H2-TPR), and O2-temperature programmed desorption (O2-TPD). Furthermore, the sulfur tolerance and sulfur poisoning mode were investigated. The results indicate that the catalyst PdO/CeO2-Al2O3 activated with rapid activation shows higher activity for methane combustion and better sulfur tolerance. The result of sulfur content analysis shows that there is a large number of sulfur species on the catalyst’s surface after reactivation at high temperature. It proves that the activity of catalysts cannot be fully restored by high-temperature reactivation.
Keywords ultrasonic      methane combustion      sulfur poisoning     
Corresponding Author(s): LIU Xianyun,Email:xianyun329@sina.com   
Issue Date: 05 March 2012
 Cite this article:   
Xianyun LIU,Jianzhou LIU,Feifei GENG, et al. Synthesis and properties of PdO/CeO2-Al2O3 catalysts for methane combustion[J]. Front Chem Sci Eng, 2012, 6(1): 34-37.
 URL:  
https://academic.hep.com.cn/fcse/EN/10.1007/s11705-011-1163-3
https://academic.hep.com.cn/fcse/EN/Y2012/V6/I1/34
Fig.1  H-TPR profiles of different catalysts
Fig.2  O-TPD profiles of different catalysts
Fig.3  Conversion of CH combustion on catalysts with different activation methods
Catalyst samplesFresh catalystsPoisoned catalystsRegenerated catalysts
T10% /°CT90% /°CT10% /°CT90% /°CT10% /°CT90% /°C
1#310410550710460570
2#315410370495350460
Tab.1  Catalytic activity of Pd catalysts after poisoned and regenerated
CatalystsPoisoned /wt-%Regenerated /wt-%
1#2.0741.787
2#2.7722.496
Tab.2  Poisoned/regenerated catalysts’ sulfur content
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