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Coal and Clean Coal Technology: Challenges and Opportunities Read chapter Read first chapter

2013 | OriginalPaper | Chapter

The Chemical Transformation of Calcium in Shenhua Coal During Combustion in a Muffle Furnace

Authors : Tian Sida, Zhuo Yuqun, Shu Xinqian, Chen Changhe

Published in: Cleaner Combustion and Sustainable World

Publisher: Springer Berlin Heidelberg

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Abstract

The chemical reaction characteristics of calcium in three samples of Shenhua coal, i.e. raw sample, hydrochloric acid washed sample and hydrochloric acid washed light fraction, during combustion in a muffle furnace have been investigated in this paper. Ca is bound by calcite and organic matter in Shenhua coal. X ray diffraction (XRD) phase analysis has been conducted to these samples’ combustion products obtained by heating at different temperatures. It has been found that the organically-bound calcium could easily react with clays and transform into gehlenite and anorthite partially if combusted under 815°C, whilst the excluded minerals promoted the conversion of gehlenite to anorthite. Calcite in Shenhua coal decomposed into calcium oxide and partially transformed into calcium sulfate under 815°C, and formed gehlenite and anorthite under 1,050°C. Calcite and other HCl-dissolved minerals in Shenhua coal were responsible mainly for the characteristic that the clay minerals in Shenhua coal hardly became mullite during combustion.

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previous chapter Numerical Study of Furnace Process of a 600 MW Pulverized Coal Boiler Under Low Load with SNCR Application
next chapter Influence of Metal Additives on Pyrolysis Behavior of Bituminous Coal by TG-FTIR Analysis
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Metadata
Title
The Chemical Transformation of Calcium in Shenhua Coal During Combustion in a Muffle Furnace
Authors
Tian Sida
Zhuo Yuqun
Shu Xinqian
Chen Changhe
Copyright Year
2013
Publisher
Springer Berlin Heidelberg
Book
Cleaner Combustion and Sustainable World

Print ISBN: 978-3-642-30444-6

Electronic ISBN: 978-3-642-30445-3

Copyright Year: 2013

DOI
https://doi.org/10.1007/978-3-642-30445-3_22