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Application of Light Microscopy to Direct Coal Liquefaction Research

Published online by Cambridge University Press:  28 July 2005

Gino A. Irdi ,
Robert P. Warzinski  and
Harold B. Booher
Gino A. Irdi
Affiliation:
U.S. Department of Energy, Federal Energy Technology Center, Mail Stop 94-412, P.O. Box 10940, Pittsburgh PA 15236-0940
Robert P. Warzinski
Affiliation:
U.S. Department of Energy, Federal Energy Technology Center, Mail Stop 94-412, P.O. Box 10940, Pittsburgh PA 15236-0940
Harold B. Booher
Affiliation:
U.S. Department of Energy, Federal Energy Technology Center, Mail Stop 94-412, P.O. Box 10940, Pittsburgh PA 15236-0940
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Abstract

Light microscopy was used to analyze the effects of added catalyst at different conditions (temperature and reaction times) in liquefaction testing of a low pyritic sulfur bituminous coal. Quantitative changes in vitrinite/vitroplast reflectance of coal and liquefaction residues were shown to be useful markers in analyzing and understanding the role of catalyst during the initial stage of coal particle hydrogenation. Lower reflectance values corresponded to increased conversions up to about the 60 min and 375°C experimental conditions. Microscopical observation of liquefaction residues also revealed the presence of “wall scales” of varying width.

Keywords

liquefactionvitrinite/vitroplast reflectance“wall scales,” maceralsconversion
Type
Research Article
Information
Microscopy and Microanalysis , Volume 4 , Issue 1 , February 1998 , pp. 50 - 55
Copyright
© 2005 Microscopy Society of America

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