Comprehensive investigation of Pd/ZSM-5/MCM-48 composite catalysts with enhanced activity and stability for benzene oxidation

He, Chi, Li, Jinjun, Li, Peng, Cheng, Jie, Hao, Zhengping and Xu, Zhi-Ping (2010) Comprehensive investigation of Pd/ZSM-5/MCM-48 composite catalysts with enhanced activity and stability for benzene oxidation. Applied Catalysis B: Environmental, 96 3-4: 466-475. doi:10.1016/j.apcatb.2010.03.005


Author He, Chi
Li, Jinjun
Li, Peng
Cheng, Jie
Hao, Zhengping
Xu, Zhi-Ping
Title Comprehensive investigation of Pd/ZSM-5/MCM-48 composite catalysts with enhanced activity and stability for benzene oxidation
Journal name Applied Catalysis B: Environmental   Check publisher's open access policy
ISSN 0926-3373
1873-3883
Publication date 2010-06-07
Sub-type Article (original research)
DOI 10.1016/j.apcatb.2010.03.005
Volume 96
Issue 3-4
Start page 466
End page 475
Total pages 10
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2011
Language eng
Formatted abstract ZSM-5/MCM-48 composite materials with various acidities have been successfully assembled on zeolite seeds via a two-step crystallization process. The characterization results reveal that the ZSM-5 seeds are present in the framework of the resulting composite materials with its content gradually increasing with the Si/Al molar ratio, and Al atoms prefer the tetrahedral coordination in composite products. The amount of strong acid sites increases as the Si/Al molar ratio decreases, while that of weak acid sites is almost unchanged. The activity tests demonstrate that the catalytic activity of Pd-loaded ZSM-5/MCM-48 composite catalysts is much higher than that of Pd/ZSM-5 and Pd/MCM-48, and all these catalysts are active and stable in the total oxidation of benzene. Both Pd0 and Pd2+ are responsible for the oxidation reaction, and the catalytic activity is closely related to the support acidity, the CO2 desorption capability and the Pd dispersion. This research thus indicates that the novel composite materials have promised as active Pd-supported catalysts in the elimination of volatile organic compound (VOCs).
Keyword Two-step crystallization
ZSM-5/MCM-48
Acidity
Stability
VOCs
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Engineering Publications
Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Sun, 06 Jun 2010, 00:08:34 EST