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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 66 (1982)

Issue: 7. (July)

First Page: 968

Last Page: 968

Title: Effect of Degradinite on Coal Properties and Its Conversion at Ikeshima Coal Mine: ABSTRACT

Author(s): Keizo Fujii, Sumio Yamazaki, Koji Shoda, Keiji Miki

Article Type: Meeting abstract


In most of Japan's subbituminous and bituminous coal deposits, the characteristic composition is 95.5% vitrinite group materials (telocollinite and degradinite?), 3% exinite group materials (sporinite, cutinite, and resinite), and a small friction of inertinite group materials (sclerotinite and fusinite). Analysis of the coal at the Ikeshima mine has shown that the quality of the coal is directly related to the vitrinite maceral composition. Thus it is concluded that there can be considerable Previous HitvariationNext Hit in the quality of coal, depending upon the degradinite content.

1. Degradinite shows higher H/C and n-alkane compared with telocollinite so higher degradinite content results in higher calorific value and volatile content.

2. Vitrinite Previous HitreflectivityTop is inversely proportional to degradinite content. This is based on the fact that chemical and physical properties of telocollinite is likely to be controlled by differences in paleogeography and diagenesis.

3. Gieselar maximum fluidity increases exponentially with the increase in degradinite content.

4. Hydrogenation reactions were performed at a reaction temperature of 380°C, hydrogen initial pressure of 30 kg/cm2 and reaction time of 30 minutes, using a 500 ml batch type autoclave.

The conversion rate increases in proportion to the increase in degradinite content.

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Copyright 1997 American Association of Petroleum Geologists