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Oxidative dehydrogenation of isobutane using modified activated carbons as catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42689 45937 2009 8 PDF Available
Title
Oxidative dehydrogenation of isobutane using modified activated carbons as catalysts
Abstract

The activated carbon obtained by chemical activation of peach stones with KOH has been modified by H2O2, (NH4)2S2O8, HNO3, CH3COOOH (peroxyacetic acid), air, NH3, H2 or by thermal treatment to change the character of its surface by introduction or removal of oxygen functional groups. The modified activated carbon samples obtained have been subjected to elemental analysis, TPD measurements and texture characterisation. In all samples the dominant presence of micropores has been established and they have been found to differ much in the content of oxygen groups. The catalytic properties of the carbon samples in the reaction of oxidative dehydrogenation of isobutane to isobutene (ODI) have been studied. All the samples have been shown to catalyse the ODI reaction whose optimum temperature is in the range 523–673 K. The isobutene yield values obtained are close to those reported by other authors, and they have been found to depend not only on the content of oxygen in a given carbon sample but also on the type of oxygen functional groups. The results seem to confirm the hypothesis that the carbonyl/quinone groups are the active sites involved in ODI.

Graphical abstractThe activated carbon obtained by chemical activation of peach stones with KOH has been modified by different treatments to change the character of its surface. All the samples have been shown to catalyse the reaction of oxidative dehydrogenation of isobutane to isobutene (ODI). The results seem to confirm the hypothesis that the carbonyl/quinone groups are the active sites involved in ODI.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Activated carbon; Oxidative dehydrogenation; Isobutane; Isobutene
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Oxidative dehydrogenation of isobutane using modified activated carbons as catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 362, Issues 1–2, 30 June 2009, Pages 67–74
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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