Paper Title:
Study on Preparation and Catalytic Properties of Pd/γ-Al2O3 Catalysts in One-Step Synthesis of Dimethyl Ether
  Abstract

A series of Pd/γ-Al2O3 catalysts with different additons of Pd were prepared by impregnation. The effect of calcination condition and Pd loading on catalytic performance of catalysts for one-step dimethyl ether synthesis has been investigated. The physic-chemical performance and structure of Pd/γ-Al2O3 catalysts were characterized by CO-TPD, TGA and nitrogen physisorption. The results show that the dispersion of Pd and the amount of adsorbration on the CO-bridge of Pd could be increased to by the moderate microwave heating on the catalysts, and the catalyst performance can be improved. But a large number of surface acidic sites of Pd/γ-Al2O3 are covered by highly fragmented Pd-grain, it causes DME selectivity reduced. And the excessive Pd can reduce the samples’ surface acid, decrease the dispersion of the metal Pd and block up the pore of γ-Al2O3. The CO conversion rate and DME space-time yield could reach 60.1% and 28.76 mmol·g-1·h-1 respectively at 2% Pd loading, at this time Pd/γ-Al2O3 has a high Pd activity surface and ideal acid sites.

  Info
Periodical
Edited by
Honghua Tan
Pages
1404-1409
DOI
10.4028/www.scientific.net/AMM.66-68.1404
Citation
R. Z. Chu, Z. C. Zhang, Y. F. Liu, X. L. Meng, Z. M. Zong, X. Y. Wei, "Study on Preparation and Catalytic Properties of Pd/γ-Al2O3 Catalysts in One-Step Synthesis of Dimethyl Ether", Applied Mechanics and Materials, Vols. 66-68, pp. 1404-1409, 2011
Online since
July 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Min Kang, Jae Hyun Park, Eun Duck Park, Ji Man Kim, Dae Jung Kim, Jae Eui Yie
Abstract:The selective catalytic reduction of NOx with NH3 (NH3-SCR) was investigated over Pt catalysts supported on various supports such as...
61
Authors: Li Bao Wu, Dong Mei Jiao, Li Fang Chen, Jin An Wang, Fa Hai Cao
Abstract:Three CoMo supported catalysts with different supports, Al2O3, MgO and MgO-MgAl2O4, were prepared by a urea matrix combustion method. The...
45
Authors: Feng Hua Bai, Yin Xia Zhang, Hai Quan Su, Xue Fen Li, Hui Pan, Xu Zhuang Yang
Abstract:The effect of precursors of Co/γ-Al2O3 catalysts prepared from Co(NO3)2 and...
684
Authors: Takeshi Miki, Yutaka Tai
Abstract:Fe2O3/Al2O3 catalyst was prepared and the catalytic oxidation of toluene over the catalyst was...
101
Authors: Hong Wang, Cui Qing Li, Fu Chen Ding, Yong Ji Song, Xue Bing Lu
Chapter 1: Environmental Chemistry and Biology
Abstract:The Ni(x)Co(10)/MOR (x = 0.01, 0.15, 0.30) catalysts were prepared by the impregnating method. The catalysts were characterized by XRD,...
77