Comprehensive Conventional Analysis of Southern Hemisphere Coal Chars of Different Ranks for Fixed Bed Gasification

Comprehensive Conventional Analysis of Southern Hemisphere Coal Chars of Different Ranks for Fixed Bed Gasification

Andrew O. Odeh

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North-West University

Comprehensive Conventional Analysis of Southern Hemisphere Coal Chars of Different Ranks for Fixed Bed Gasification

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Abstract

In this study, the physical and chemical changes accompanied in the coal to char transition were examined by conventional and Fourier Transform infrared spectroscopy (FTIR) techniques. Six coals (lignite to anthracite) of ≤75 μm were acid washed, and subjected to a slow heating rate of 20 o C/min from 450 to 700 o C at atmospheric atmosphere. The chars were characterized by physical, chemical and petrographic evaluations. The coals were low rank C lignite (Rov = 0.31), low rank B sub-bituminous (Rov = 0.47), medium rank C bituminous (Rov = 0.73 for high volatile and Rov = 0.78 for low volatile), high rank C semi-anthracite (Rov = 2.48) and high rank B anthracite (Rov = 3.26) respectively. Char properties determined by conventional technique (proximate, ultimate and calorific value) and FTIR revealed correlations of the chemical structural changes during the coal to char transition. Unique relationships between the fuel ratio and other coal properties (H/C atomic ratio and aromaticity) were established. The fuel ratio was determined to be in the range of 1.9 -21.0 for lignite; 3.4 -20.3 for subbituminous; 5.5 -24.0 for bituminous; 11.6 -29.6 for semi-anthracite and 16.5 -27.8 for anthracite.

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No external funding was declared for this work.

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The authors declare no conflict of interest.

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How to Cite This Article

Andrew O. Odeh. 2016. \u201cComprehensive Conventional Analysis of Southern Hemisphere Coal Chars of Different Ranks for Fixed Bed Gasification\u201d. Global Journal of Research in Engineering - E: Civil & Structural GJRE-E Volume 15 (GJRE Volume 15 Issue E4): .

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GJRE Volume 15 Issue E4
Pg. 5- 16

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Crossref Journal DOI 10.17406/gjre

Print ISSN 0975-5861

e-ISSN 2249-4596

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GJRE-E Classification: FOR Code: 290899

Submission ReceivedJune 13, 2015
Peer Review Double Blind
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Accepted July 1, 2015
Published July 15, 2015

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January 6, 2016

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Article Matrices

Total Score: 101

Country: South Africa

Subject: Global Journal of Research in Engineering - E: Civil & Structural

Authors: Andrew O. Odeh (PhD/Dr. count: 0)

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