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Modeling of adiabatic moving-bed reactor for dehydrogenation of isobutane to isobutene

Paper ID Volume ID Publish Year Pages File Format Full-Text
41509 45891 2011 7 PDF Available
Title
Modeling of adiabatic moving-bed reactor for dehydrogenation of isobutane to isobutene
Abstract

The dehydrogenation of isobutane to isobutene in adiabatic radial-flow moving-bed reactors was studied. First order rate expressions were considered for the primary reaction and deactivation kinetics incorporating the reversibility of dehydrogenation reaction. Kinetic data from a fixed-bed lab-scale reactor were used for modeling of the commercial size moving-bed reactor. The model was solved numerically by dividing the reactor into differential isothermal moving-bed reactors. The conversion of isobutane to isobutene was found to be equilibrium limited in commercial-sized reactors. The model predicted the trends of conversion, temperature, and catalyst activity with conversion levels somewhat lower than observed values which was attributed to the side-reactions.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (169 K)Download as PowerPoint slideResearch highlights► First-order kinetic expressions can express the trend of parameters in reactors. ► Slopes of adiabatic operating lines are underestimates due to side reactions. ► The dehydrogenation products leaving each reactor are close to equilibrium. ► Catalyst activity loss during a cycle before regeneration is large (ca. 75%).

Keywords
Isobutane dehydrogenation; Pt–Sn catalyst; Moving-bed reactor; Kinetics; Catalyst deactivation
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Modeling of adiabatic moving-bed reactor for dehydrogenation of isobutane to isobutene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 395, Issues 1–2, 15 March 2011, Pages 107–113
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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