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Catalytic oxidation of ethane with oxygen using fluidised nanoparticle NiO catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
41372 45886 2011 9 PDF Available
Title
Catalytic oxidation of ethane with oxygen using fluidised nanoparticle NiO catalyst
Abstract

In a typical industrial catalyst, a small amount of catalytically active species is finely dispersed inside a large amount of porous support material. The reactor volume is mainly occupied by the catalyst support, not by the catalytic species itself. The use of fluidised nanoparticles as catalyst without the need of a support may result in drastic reduction in catalytic reactor volume for major savings in capital and operating costs. Here we report for the first time the use of fluidised NiO nanoparticles to catalyse ethane–oxygen reaction at temperatures of 240–420 °C. Our data indicate that the fluidised NiO nanoparticles exhibit very different characteristics from the traditional porous catalyst. The lack of a rigid porous structure in the fluidised NiO nanoparticle catalyst allows ethyl radicals to desorb from the catalyst surface into the gas phase to initiate further gas-phase radical chain reactions. Therefore, the ethane–oxygen reaction catalysed by the fluidised NiO nanoparticles shows some typical behaviour of gas-phase reactions. In contrast, the rigid porous structure in the NiO/SiO2 catalyst does not allow the radicals to desorb from catalyst surface into the bulk gas phase.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (73 K)Download as PowerPoint slideHighlights► Fluidised NiO nanoparticles are used to catalyse the reaction between C2H6 and O2. ► NiO nanoparticles behave differently from sub-millimetre-sized NiO/SiO2 catalyst. ► C2H5 radicals desorb from NiO nanoparticles for further gas-phase reactions.

Keywords
Fluidised nanoparticle catalyst; Radical desorption; Light hydrocarbon conversion; Catalytic oxidation; Ethane; Nickel oxide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 405, Issues 1–2, 3 October 2011, Pages 166–174
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us