Title of article :
The Effect of Alkali Metal Promoters on the Stability and Coke Formation of Platinum-Based Propane Dehydrogenation Catalysts: A Kinetic Study
Author/Authors :
-، - نويسنده Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, I.R. IRAN Zangeneh, Farnaz , -، - نويسنده Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, I.R. IRAN Taeb, Abbas , -، - نويسنده Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, I.R. IRAN Gholivand, Khodayar , -، - نويسنده Catalyst Research Group, Petrochemical Research and Technology Company, National Petrochemical Company, P.O. Box 14358-84711 Tehran, I.R. IRAN Sahebdelfar, Saeed
Issue Information :
فصلنامه با شماره پیاپی 68 سال 2013
Pages :
8
From page :
25
To page :
32
Abstract :
-
Abstract :
The kinetics of catalyst deactivation and coke formation during dehydrogenation of propane over supported Pt–based catalysts and, in particular, the effect of alkali metal promoters on catalyst activity and stability were studied. The analysis of propane conversion data showed that there is an optimum level of alkali metal promoter loading for both catalyst activity and stability.A model based on individual site poisoning was proposed for coke deposition kinetics. The model showed fair fits for coke formation data with time on stream. While the rate constant of coke formation was slightly affected by loading of Na as the neutralizing promoter, the ultimate coke amount was strongly dependent on the Na loading. It was found that coke formation sites should be different from active sites for the main reaction.  
Journal title :
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)
Serial Year :
2013
Journal title :
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)
Record number :
2063084
Link To Document :
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