Secondary reactions of propylene on Ga/γ-Al2O3 propane dehydrogenation catalysts

被引：8

作者：

Bardool, Roghayeh ^{[1
,4
]}

Dean, David P. ^{[1
]}

Pham, Hien N. ^{[2
,3
]}

Datye, Abhaya K. ^{[2
,3
]}

Raeissi, Sona ^{[4
]}

Rahimpour, Mohammad Reza ^{[4
]}

Miller, Jeffery T. ^{[1
]}

机构：

[1] Purdue Univ, Davidson Sch Chem Engn, W Lafayette, IN 47907 USA

[2] Univ New Mexico, Dept Chem & Biol Engn, Albuquerque, NM 87137 USA

[3] Univ New Mexico, Ctr Microengn Mat, Albuquerque, NM 87137 USA

[4] Shiraz Univ, Sch Chem & Petr Engn, Shiraz 7134851154, Iran

来源：

JOURNAL OF CATALYSIS | 2023年 / 428卷

关键词：

Ga propane dehydrogenation; Single site gallium catalyst; Propylene secondary reactions during propane; dehydrogenation; Gallium on alumina structure; DENSITY-FUNCTIONAL THEORY; ETHANE DEHYDROGENATION; AROMATIZATION CATALYSTS; ALKANE REACTIONS; GALLIUM; GA; HYDROGEN; PROPENE; MFI; MECHANISMS;

D O I：

10.1016/j.jcat.2023.115201

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：

Supported Ga catalysts have been widely studied for propane dehydrogenation (PDH). In this study, Ga/gamma-Al2O3 catalysts were evaluated for PDH. The propylene selectivity decreased with increasing propane conversion. It is generally thought that propylene and light gas by-products occur from chemisorbed propane and are, therefore, primary products. By extrapolating the product selectivities to zero per cent propane conversion, the initial propylene selectivity was near 100% and is a primary product. The light gas selectivities, however, are near 0% indicating that these are secondary products. The direct reaction of propylene produced the same light gas products, e.g., methane, ethylene, propane, butenes and pentenes, observed for PDH and confirmed that these occur by an independent reaction of propylene. Thus, while the intrinsic PDH propylene selectivity is high, these secondary propylene reactions lower the selectivity, especially, at higher conversions and higher partial pressures.

引用

页数：10

共 62 条

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