SO2 adsorption and desorption characteristics of bimetallic Pd-Pt catalysts: Pd: Pt ratio dependency

被引：30

作者：

Wilburn, Monique Shaunta ^{[1
,2
]}

Epling, William S. ^{[1
,2
]}

机构：

[1] Univ Virginia, Dept Chem Engn, Charlottesville, VA 22901 USA

[2] Univ Houston, Dept Chem & Biomol Engn, Houston, TX 77004 USA

来源：

CATALYSIS TODAY | 2019年 / 320卷

基金：

美国国家航空航天局;

关键词：

Pt-Pd bimetallic catalyst; Sulfur poisoning; DIESEL OXIDATION CATALYSTS; SUPPORTED PALLADIUM CATALYSTS; METHANE EMISSIONS ABATEMENT; FAST SCR REACTION; GAMMA-ALUMINA; PT-PD/AL2O3; CATALYSTS; CLAUS CATALYSIS; SULFUR-DIOXIDE; CO ADSORPTION; NOX STORAGE;

D O I：

10.1016/j.cattod.2017.08.054

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

SO2 adsorption and desorption, and species formed, on Pd/Pt bimetallic, gamma-Al2O3 supported catalysts were characterized as a function of Pd/Pt ratio using DRIFTS and TPD studies. Catalysts with a high Pd content tended to form a greater amount of aluminum sulfate species, which decomposed at high temperature. In contrast, low Pd content catalysts tended to form a greater amount of low-temperature decomposing and desorbing species, such as molecular SO2 and alumina surface sulfite. The amount of SO2 adsorbed and later desorbed during TPD decreased with increasing Pt content in the bimetallic Pd-Pt/Al2O3 catalysts.

引用

页码：11 / 19

页数：9

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