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Title: Superacid catalyzed coal conversion chemistry. 1st and 2nd quarterly technical progress reports, September 1, 1983-March 30, 1984. [Model compound consisting of 2 benzene rings connected with various bridging units such as alkylidene, ether, sulfide, etc]

Abstract

In our laboratories we have previously developed a mild coal conversion process. This involves the use of a superacid system consisting of HF and BF/sub 3/ in presence of hydrogen and/or a hydrogen donor solvent. In order to understand the chemistry involved in the process of depolymerization of coal by the HF:BF/sub 3/:H/sub 2/ system we are carrying out a systematic study of a number of coal model compounds. The model compounds selected for present study have two benzene rings connected with various bridging units such as alkylidene, ether, sulfide etc. From studies so far carried out it appears that high pyridine extractibilities achieved by treating coal at temperature below 100/sup 0/C results from the cleavage of bridges such as present in bibenzyl, diphenyl methane, dibenzyl ether, dibenzyl sulfide etc. On the other hand the increased cyclohexane extractibility and distillability observed at relatively higher temperatures and hydrogen pressures reflects the hydrogenation and cleavage of the aromatic backbone in coal structure similar to what is seen in the conversion of model compounds such as biphenyl, diphenyl ether, diphenyl sulfide, anthracene, etc.

Authors:
Publication Date:
Research Org.:
University of Southern California, Los Angeles (USA)
Sponsoring Org.:
U. S. Department of Energy (DOE)
OSTI Identifier:
5165212
Report Number(s):
DOE/PC/60810-T1
ON: DE84009671
DOE Contract Number:  
FG22-83PC60810
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AROMATICS; DEPOLYMERIZATION; BORON FLUORIDES; CATALYTIC EFFECTS; COAL; COAL LIQUEFACTION; CATALYSTS; CHEMISTRY; HYDROFLUORIC ACID; CYCLOHEXANE; HIGH TEMPERATURE; HYDROGEN; MEDIUM TEMPERATURE; PYRIDINE; RESEARCH PROGRAMS; STRUCTURAL MODELS; TEMPERATURE DEPENDENCE; ALKANES; AZINES; BORON COMPOUNDS; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; CYCLOALKANES; DECOMPOSITION; ELEMENTS; ENERGY SOURCES; FLUORIDES; FLUORINE COMPOUNDS; FOSSIL FUELS; FUELS; HALIDES; HALOGEN COMPOUNDS; HETEROCYCLIC COMPOUNDS; HYDROCARBONS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; LIQUEFACTION; MATERIALS; NONMETALS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PYRIDINES; THERMOCHEMICAL PROCESSES; 010405* - Coal, Lignite, & Peat- Hydrogenation & Liquefaction; 400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)

Citation Formats

Olah, G.A. Superacid catalyzed coal conversion chemistry. 1st and 2nd quarterly technical progress reports, September 1, 1983-March 30, 1984. [Model compound consisting of 2 benzene rings connected with various bridging units such as alkylidene, ether, sulfide, etc]. United States: N. p., 1984. Web. doi:10.2172/5165212.
Olah, G.A. Superacid catalyzed coal conversion chemistry. 1st and 2nd quarterly technical progress reports, September 1, 1983-March 30, 1984. [Model compound consisting of 2 benzene rings connected with various bridging units such as alkylidene, ether, sulfide, etc]. United States. doi:10.2172/5165212.
Olah, G.A. Sun . "Superacid catalyzed coal conversion chemistry. 1st and 2nd quarterly technical progress reports, September 1, 1983-March 30, 1984. [Model compound consisting of 2 benzene rings connected with various bridging units such as alkylidene, ether, sulfide, etc]". United States. doi:10.2172/5165212. https://www.osti.gov/servlets/purl/5165212.
@article{osti_5165212,
title = {Superacid catalyzed coal conversion chemistry. 1st and 2nd quarterly technical progress reports, September 1, 1983-March 30, 1984. [Model compound consisting of 2 benzene rings connected with various bridging units such as alkylidene, ether, sulfide, etc]},
author = {Olah, G.A.},
abstractNote = {In our laboratories we have previously developed a mild coal conversion process. This involves the use of a superacid system consisting of HF and BF/sub 3/ in presence of hydrogen and/or a hydrogen donor solvent. In order to understand the chemistry involved in the process of depolymerization of coal by the HF:BF/sub 3/:H/sub 2/ system we are carrying out a systematic study of a number of coal model compounds. The model compounds selected for present study have two benzene rings connected with various bridging units such as alkylidene, ether, sulfide etc. From studies so far carried out it appears that high pyridine extractibilities achieved by treating coal at temperature below 100/sup 0/C results from the cleavage of bridges such as present in bibenzyl, diphenyl methane, dibenzyl ether, dibenzyl sulfide etc. On the other hand the increased cyclohexane extractibility and distillability observed at relatively higher temperatures and hydrogen pressures reflects the hydrogenation and cleavage of the aromatic backbone in coal structure similar to what is seen in the conversion of model compounds such as biphenyl, diphenyl ether, diphenyl sulfide, anthracene, etc.},
doi = {10.2172/5165212},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1984},
month = {Sun Jan 01 00:00:00 EST 1984}
}

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