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Effect of catalyst on coal char structure and its role in catalytic coal gasification

Paper ID Volume ID Publish Year Pages File Format Full-Text
49272 46731 2016 5 PDF Available
Title
Effect of catalyst on coal char structure and its role in catalytic coal gasification
Abstract

•Potassium carbonate can inhibit the graphitization and condensation of coal char in pyrolysis.•K-Char may be the active intermediate in catalytic coal gasification. It is easier for H2O to react with K-Char intermediate in catalytic coal gasification.

The structure of the coal chars with and without catalyst was characterized using X-ray diffraction and laser Raman techniques. The catalyst changes the structure of the organic unit in coal char. The mechanism by which the catalyst affects the structure of coal char in pyrolysis was investigated by X-ray photoelectron spectroscopy. For the first time, the direct evidence of electron transfer in catalyst–coal interactions was obtained, and a K-Char intermediate forms. This makes it easier for H2O to attack the K-Char intermediate, thus increasing the gasification reactivity of coal char.

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Keywords
Catalytic coal gasification; XRD; Raman; Structure; XPS; Role
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Effect of catalyst on coal char structure and its role in catalytic coal gasification
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 79, 5 April 2016, Pages 1–5
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
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