Effect of Boron Promotion on Coke Formation during Propane Dehydrogenation over Pt/γ-Al2O3 Catalysts

被引：57

作者：

Aly, Mostafa ^{[1
]}

Fornero, Esteban L. ^{[1
,2
]}

Leon-Garzon, Andres R. ^{[1
]}

Galvita, Vladimir V. ^{[1
]}

Saeys, Mark ^{[1
]}

机构：

[1] Univ Ghent, Lab Chem Technol LCT, B-9052 Ghent, Belgium

[2] UNL, Inst Desarrollo Tecno Ind Quim INTEC, CONICET, S3000 GLN, Santa Fe, Argentina

来源：

ACS CATALYSIS | 2020年 / 10卷 / 09期

关键词：

platinum catalysts; boron oxide promotion; alkane dehydrogenation; coking; catalyst stability; dehydrogenation; support acidity; borated alumina; PT-SN CATALYSTS; CARBON DEPOSITION; PERFORMANCE; STABILITY; KINETICS; ETHANE; COBALT; HYDROGENATION; NANOPARTICLES; RESISTANCE;

D O I：

10.1021/acscatal.9b05548

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：

The effect of boron promotion on the performance of 3 wt % Pt/gamma-Al2O3 catalysts during propane dehydrogenation was investigated. A series of boron-promoted Pt/XB-gamma-Al2O3 catalysts were synthesized, tested, and characterized. The sequential impregnation of 1 wt % boron and 3 wt % platinum decreases the amount of deposited carbon 3-fold, increases the propylene selectivity from 90% to 98%, and enhances the activity after 12 h by 40%. Catalyst characterization and thermodynamic DFT calculations suggest that boron forms a finely dispersed amorphous oxide on the gamma-Al2O3 support and on the platinum particles, modifying both the selectivity of the metal sites and the strength and number of acid sites on the support.

引用

页码：5208 / 5216

页数：9

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