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Reactivity of olefins in the hydrodesulfurization of FCC gasoline over CoMo sulfide catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
48840 46522 2007 6 PDF Available
Title
Reactivity of olefins in the hydrodesulfurization of FCC gasoline over CoMo sulfide catalyst
Abstract

To achieve selective hydrodesulfurization (HDS) of fluid catalytic-cracked (FCC) gasoline for producing sulfur-free gasoline (S < 10 ppm), the reactivity of various olefins contained in FCC gasoline on CoMoP/Al2O3 sulfide catalysts was investigated. Isomerization of the CC double bond from the terminal position to an internal position was observed. The steric hindrance around the CC double bond suppresses the reactivity of olefin hydrogenation. The sulfidation temperature of the catalyst has a major influence on olefin hydrogenation active sites. Addition of the appropriate amount of cobalt (Co/Mo ratio approximately 0.6) contributes to the suppression of olefin hydrogenation at high reaction temperature (260 °C). From the comparison of catalytic performance and characterization of our CoMoP/Al2O3 catalyst with an analogous commercial catalyst, it is suggested that the hydrogenation of olefins depends not only on the state of the Mo CUS but also on the steric effects of both olefin structure and MoS2 crystalline structure.

Keywords
FCC gasoline; Hydrogenation; Olefin; Cobalt molybdenum catalyst; Hydrodesulfurization
First Page Preview
Reactivity of olefins in the hydrodesulfurization of FCC gasoline over CoMo sulfide catalyst
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 70, Issues 1–4, 31 January 2007, Pages 542–547
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis