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Pillared laponite clays-supported palladium catalysts for the complete oxidation of benzene

Pillared laponite clays-supported palladium catalysts for the complete oxidation of benzene
Pillared laponite clays-supported palladium catalysts for the complete oxidation of benzene
Zr-, Ce-, and Al-pillared laponite clays (Al-Lap, Ce-Lap, Zr-Lap) were prepared and used as supports of palladium catalysts for the complete oxidation of benzene. The pillared clays and the supported Pd catalysts were characterized by N2 adsorption/desorption, differential scanning calorimetry (DSC), hydrogen chemisorption and temperature-programmed reduction (TPR) techniques. The specific surface areas of the pillared clays exceed 430 m2/g, and the pore diameters are greater than 4 nm. DSC analysis revealed that the pillared clays have higher thermal stability in comparison with the parent clay. Palladium catalysts supported on the pillared clays are much more active than those supported on conventional alumina. Pd/Zr-Lap, in particular, could catalyze the complete oxidation of benzene at a temperature as low as 210 °C. The effect of calcination temperature on the catalytic activity was investigated. The optimal calcination temperature was found to be 400 °C for Pd/Al-Lap catalysts, and 600 °C for Pd/Zr-Lap and Pd/Ce-Lap catalysts. At optimal calcination temperatures, palladium crystallites of proper size could be formed in pillared clays and showed a higher activity than those calcined at other temperatures.

pillared clays, vocs, benzene, catalytic oxidation, palladium catalysts
1381-1169
173-179
Li, Jinjun
2eb37e2f-032f-47f3-b811-220db93429fb
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Hao, Zhengping
ddb48896-0a13-41b1-9eb0-bc7ec1c4cdec
Xu, Xiuyan
ea948a8a-3c6b-4a92-9de8-30ccfe4cfa75
Zhuang, Yahui
daa936a9-40e8-4375-91f9-11ef1fc28f0b
Li, Jinjun
2eb37e2f-032f-47f3-b811-220db93429fb
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Hao, Zhengping
ddb48896-0a13-41b1-9eb0-bc7ec1c4cdec
Xu, Xiuyan
ea948a8a-3c6b-4a92-9de8-30ccfe4cfa75
Zhuang, Yahui
daa936a9-40e8-4375-91f9-11ef1fc28f0b

Li, Jinjun, Jiang, Zheng, Hao, Zhengping, Xu, Xiuyan and Zhuang, Yahui (2005) Pillared laponite clays-supported palladium catalysts for the complete oxidation of benzene. Journal of Molecular Catalysis A: Chemical, 225 (2), 173-179. (doi:10.1016/j.molcata.2004.08.040).

Record type: Article

Abstract

Zr-, Ce-, and Al-pillared laponite clays (Al-Lap, Ce-Lap, Zr-Lap) were prepared and used as supports of palladium catalysts for the complete oxidation of benzene. The pillared clays and the supported Pd catalysts were characterized by N2 adsorption/desorption, differential scanning calorimetry (DSC), hydrogen chemisorption and temperature-programmed reduction (TPR) techniques. The specific surface areas of the pillared clays exceed 430 m2/g, and the pore diameters are greater than 4 nm. DSC analysis revealed that the pillared clays have higher thermal stability in comparison with the parent clay. Palladium catalysts supported on the pillared clays are much more active than those supported on conventional alumina. Pd/Zr-Lap, in particular, could catalyze the complete oxidation of benzene at a temperature as low as 210 °C. The effect of calcination temperature on the catalytic activity was investigated. The optimal calcination temperature was found to be 400 °C for Pd/Al-Lap catalysts, and 600 °C for Pd/Zr-Lap and Pd/Ce-Lap catalysts. At optimal calcination temperatures, palladium crystallites of proper size could be formed in pillared clays and showed a higher activity than those calcined at other temperatures.

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Published date: January 2005
Keywords: pillared clays, vocs, benzene, catalytic oxidation, palladium catalysts
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 352794
URI: http://eprints.soton.ac.uk/id/eprint/352794
ISSN: 1381-1169
PURE UUID: c9d7f2ac-2bf4-4b2a-992d-02b03fdf064b
ORCID for Zheng Jiang: ORCID iD orcid.org/0000-0002-7972-6175

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Date deposited: 17 Jun 2013 13:32
Last modified: 26 Nov 2019 01:35

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Contributors

Author: Jinjun Li
Author: Zheng Jiang ORCID iD
Author: Zhengping Hao
Author: Xiuyan Xu
Author: Yahui Zhuang

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