Effect of V2O5 Loading on Propane Combustion over Pt/V2O5-Al2O3 Catalysts

被引：29
|
作者：
Avila, Maria S. [1 ]
Vignatti, Charito I. [1 ]
Apesteguia, Carlos R. [1 ]
Rao, V. Venkat [2 ]
Chary, Komandur [2 ]
Garetto, Teresita F. [1 ]
机构：
[1] UNL, CONICET, INCAPE, Catalysis Sci & Engn Res Grp GICIC, RA-3000 Santa Fe, Argentina
[2] Indian Inst Chem Technol, Hyderabad 500007, Andhra Pradesh, India
来源：
CATALYSIS LETTERS | 2010年 / 134卷 / 1-2期
关键词：
Propane combustion; Pt catalysts; Vanadia-alumina supports; VOCs abatement; VANADIUM-OXIDE CATALYSTS; OXIDATIVE DEHYDROGENATION; DEEP OXIDATION; PLATINUM; BENZENE; PALLADIUM; ALKANES; ORIGIN;
D O I：
10.1007/s10562-009-0204-8
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：
Propane combustion was studied on Pt(0.4%)/V2O5-Al2O3 catalysts containing up to 20% V2O5. The density, strength and nature of surface acid sites were determined by TPD of NH3 and FTIR spectra of adsorbed pyridine. The sample acidity increased with the vanadium content, essentially because the addition of vanadium oxide generated Bronsted acid sites. The Pt dispersion as determined by H-2 chemisorption increased with increasing V2O5 loading. The sample activity for propane combustion was evaluated through both conversion versus temperature (light-off curves) and kinetically-controlled conversion versus time catalytic tests. The propane combustion turnover rate on Pt/V2O5-Al2O3 increased with the amount of vanadium, probably because the intrinsic Pt oxidation activity increases with the sample acidity.
引用
收藏
页码：118 / 123
页数：6
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