Propane Dehydrogenation over a Commercial Pt-Sn/Al2O3 Catalyst for Isobutane Dehydrogenation: Optimization of Reaction Conditions

doi:10.1016/S1004-9541(13)60537-6

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (7): 730-735.DOI: 10.1016/S1004-9541(13)60537-6

• 催化、动力学与反应工程 • 上一篇下一篇

Propane Dehydrogenation over a Commercial Pt-Sn/Al₂O₃ Catalyst for Isobutane Dehydrogenation: Optimization of Reaction Conditions

Farnaz Tahriri Zangeneh, Saeed Sahebdelfar, Mohsen Bahmani

Catalyst Research Group, Petrochemical Research and Technology Company, National Petrochemical Company, 14358-84711, Tehran, Iran

收稿日期:2011-03-30 修回日期:2012-12-30 出版日期:2013-07-28 发布日期:2013-08-24
通讯作者: Saeed Sahebdelfar
基金资助:
Supported by the Petrochemical Research & Technology Co. of National Petrochemical Co.

Propane Dehydrogenation over a Commercial Pt-Sn/Al₂O₃ Catalyst for Isobutane Dehydrogenation: Optimization of Reaction Conditions

Farnaz Tahriri Zangeneh, Saeed Sahebdelfar, Mohsen Bahmani

Catalyst Research Group, Petrochemical Research and Technology Company, National Petrochemical Company, 14358-84711, Tehran, Iran

Received:2011-03-30 Revised:2012-12-30 Online:2013-07-28 Published:2013-08-24
Supported by:
Supported by the Petrochemical Research & Technology Co. of National Petrochemical Co.

摘要/Abstract

摘要： The applicability of a commercial Pt-Sn/Al₂O₃ isobutane dehydrogenation catalyst in dehydrogenation of propane was studied. Catalyst performance tests were carried out in a fixed-bed quartz reactor under different operating conditions. Generally, as the factors improving propane conversion decrease the propylene selectivity, the optimal operating condition to maximize propylene yield is expected. The optimal condition was obtained by the experimental design method. The investigated parameters were temperature, hydrogen/hydrocarbon (H₂/HC) ratio and space velocity, being changed in three levels. Constrains such as the susceptibility of the catalyst components to sintering or phase transformation were also taken into account. Activity, selectivity and stability of the catalyst were considered as the measured response factors, while the space-time-yield (STY) was considered as the variable to be optimized due to its commercial interest. A STY of 16 mol·kg^-1·h^-1 was achieved under the optimal conditions of T 620℃, H₂/HC 0.6 and, weight hourly space velocity (WHSV) 2.2 h^-1. Single carbon-carbon bond rupture was found to be the main route for the formation of lower hydrocarbon byproducts.

关键词: Pt-Sn/Al₂O₃ catalyst, dehydrogenation, propane, isobutane

Abstract: The applicability of a commercial Pt-Sn/Al₂O₃ isobutane dehydrogenation catalyst in dehydrogenation of propane was studied. Catalyst performance tests were carried out in a fixed-bed quartz reactor under different operating conditions. Generally, as the factors improving propane conversion decrease the propylene selectivity, the optimal operating condition to maximize propylene yield is expected. The optimal condition was obtained by the experimental design method. The investigated parameters were temperature, hydrogen/hydrocarbon (H₂/HC) ratio and space velocity, being changed in three levels. Constrains such as the susceptibility of the catalyst components to sintering or phase transformation were also taken into account. Activity, selectivity and stability of the catalyst were considered as the measured response factors, while the space-time-yield (STY) was considered as the variable to be optimized due to its commercial interest. A STY of 16 mol·kg^-1·h^-1 was achieved under the optimal conditions of T 620℃, H₂/HC 0.6 and, weight hourly space velocity (WHSV) 2.2 h^-1. Single carbon-carbon bond rupture was found to be the main route for the formation of lower hydrocarbon byproducts.

Key words: Pt-Sn/Al₂O₃ catalyst, dehydrogenation, propane, isobutane

Farnaz Tahriri Zangeneh, Saeed Sahebdelfar, Mohsen Bahmani. Propane Dehydrogenation over a Commercial Pt-Sn/Al₂O₃ Catalyst for Isobutane Dehydrogenation: Optimization of Reaction Conditions[J]. Chinese Journal of Chemical Engineering, 2013, 21(7): 730-735.

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Propane Dehydrogenation over a Commercial Pt-Sn/Al₂O₃ Catalyst for Isobutane Dehydrogenation: Optimization of Reaction Conditions

Propane Dehydrogenation over a Commercial Pt-Sn/Al₂O₃ Catalyst for Isobutane Dehydrogenation: Optimization of Reaction Conditions

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