TiO2 and SiO2 supported Wells-Dawson heteropolyacid H6P2W18O62 as the catalyst for ETBE formation

被引：26
|
作者：
Pozniczek, J
Lubanska, A
Micek-Ilnicka, A
Mucha, D
Lalik, E
Bielanski, A
机构：
[1] Polish Acad Sci, Inst Catalysis & Surface Chem, Polyoxometalate Lab, PL-30239 Krakow, Poland
[2] Jagiellonian Univ, Fac Chem, PL-30060 Krakow, Poland
来源：
APPLIED CATALYSIS A-GENERAL | 2006年 / 298卷
关键词：
Wells-Dawson; Dawson; heteropolyacid; ETBE; ethyl-tert-butyl ether;
D O I：
10.1016/j.apcata.2005.10.013
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Catalysts containing 5-25 wt.% of Wells-Dawson heteropolyacid H6P2W13O62 supported on silica and titania (anatase) differing by the surface area and porosity were investigated using XRD, FTIR spectroscopy and catalytic tests. They were active and selective in gas-phase synthesis of ethyl-tert-butyl ether (ETBE) at temperatures as low as 40 degrees C. It has been demonstrated that the heteropolyacid H6P2W18O62 is present at the support surface predominantly in form of nanocrystallites exhibiting higher activity than that, pure, in form of the microcrystallites (a few mu m thick). (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：217 / 224
页数：8
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