Thermal Evolution Characteristics and Sulphur-bearing Compound Composition in Extract from High Organosulphur Coal

Lei Jiajing; Shen Guoying; Peng Pingan

High organosulfur coal (HO SC) is very special in that it is rich in sulfur-containing compounds (SCC) in aromatic fraction of extract. Four series of SCC, i. e., dibenzothiophene, benzonaphthrathiophene, phenanthrathiophene and benzobisbenzothiophene, have been detected in four coal samples, which were formed on restricted carbonate platform, and have varied ranks. Inspite of the similar constitutions with respect to SCC for four coal samples, their ratios between differnet series of SCC are closely related to coal rank and exact depositional environments. The results show that with increase of coal rank: (1) the relative amount of dibenzothiophene with 3-cycle structure decreases compared with other compounds with 4-, and 5-cycle structure and (2) those SCC with methy in stable positions of molecule increase. In the mean time, we also found that the amount ratio of SCC to normal aromatic hydrocarbon wth same cycles in molecule is a good indicatior of restricted extent of platform.

1. Institute of Geology, chinese Academy of Sciences, Beijing, 100028;

2. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640

Received Date: 1997-03-31

Rev Recd Date: 1997-09-19

Publish Date: 1998-06-10

Key words:

HO SC /
SCC /
carbonate platform /
coal rank

Abstract: High organosulfur coal (HO SC) is very special in that it is rich in sulfur-containing compounds (SCC) in aromatic fraction of extract. Four series of SCC, i. e., dibenzothiophene, benzonaphthrathiophene, phenanthrathiophene and benzobisbenzothiophene, have been detected in four coal samples, which were formed on restricted carbonate platform, and have varied ranks. Inspite of the similar constitutions with respect to SCC for four coal samples, their ratios between differnet series of SCC are closely related to coal rank and exact depositional environments. The results show that with increase of coal rank: (1) the relative amount of dibenzothiophene with 3-cycle structure decreases compared with other compounds with 4-, and 5-cycle structure and (2) those SCC with methy in stable positions of molecule increase. In the mean time, we also found that the amount ratio of SCC to normal aromatic hydrocarbon wth same cycles in molecule is a good indicatior of restricted extent of platform.

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Reference (6)

[1]	.Sinninghe, Damste J S, et al. Analysis, structure and geochemical-emical significance of organically-bound sulfur in the geosphere: state of the art and future research. Org Geochem, 1990, 16(4): 1077～1101
[2]	.王旭珍, 顾永达. GC/MS分析煤抽物中的含硫多环芳香化合物. 化学燃料学报, 1994, 22: 196～202
[3]	.William B Hughes. Use of thiophenic organosulfur compounds in characterizing crude oils derived from carbonate versus siliciclastic sources. In: James G. Palacased. Petroleum Geochemistry and Source Rock Potential of Carbonate Rocks. AAPG Studies in Geology^# 18, Oklahoma U. S. A. 1984. 181～196
[4]	.Brown J R, et al. Direct identification of organic sulfur species in Rasa coal from sulfur L-edge X-ray absorption near-edge spectra. Fuel, 1992, 71: 649～653
[5]	.盛国英, 傅家谟, Brssell S C等. 陆相高有机硫未熟生油岩的异常生物标志物组成及其地球化学意义探讨. 中科院地球化学研究所有机地化开放实验室年报. 贵阳: 贵州人民出版社, 1987, 50～64
[6]	.黄光辉. 矿物燃料中的芴及其衍生物的有机地球化学意义与成因初探. 中科院地球化学研究所有机地化开放实验室年报. 北京: 科学出版社, 1988. 211～228

[1]	.Sinninghe, Damste J S, et al. Analysis, structure and geochemical-emical significance of organically-bound sulfur in the geosphere: state of the art and future research. Org Geochem, 1990, 16(4): 1077～1101
[2]	.王旭珍, 顾永达. GC/MS分析煤抽物中的含硫多环芳香化合物. 化学燃料学报, 1994, 22: 196～202
[3]	.William B Hughes. Use of thiophenic organosulfur compounds in characterizing crude oils derived from carbonate versus siliciclastic sources. In: James G. Palacased. Petroleum Geochemistry and Source Rock Potential of Carbonate Rocks. AAPG Studies in Geology^# 18, Oklahoma U. S. A. 1984. 181～196
[4]	.Brown J R, et al. Direct identification of organic sulfur species in Rasa coal from sulfur L-edge X-ray absorption near-edge spectra. Fuel, 1992, 71: 649～653
[5]	.盛国英, 傅家谟, Brssell S C等. 陆相高有机硫未熟生油岩的异常生物标志物组成及其地球化学意义探讨. 中科院地球化学研究所有机地化开放实验室年报. 贵阳: 贵州人民出版社, 1987, 50～64
[6]	.黄光辉. 矿物燃料中的芴及其衍生物的有机地球化学意义与成因初探. 中科院地球化学研究所有机地化开放实验室年报. 北京: 科学出版社, 1988. 211～228

Thermal Evolution Characteristics and Sulphur-bearing Compound Composition in Extract from High Organosulphur Coal

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