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Coal Liquefaction

George R. Hill

Year: 1980
Volume: Volume 1
Number: Number 1
DOI: 10.5547/ISSN0195-6574-EJ-Vol1-No1-9
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Abstract:
The relative quantities of coal, petroleum (plus natural gas liquids), and natural gas proved and currently available in the United States are 18 X 1015 British thermal units (Btu), 3.7 X 1015 Btu, and 2.5 X 1015 Btu, respectively. The relative total recoverable resources are 134 X 1015 Btu for coal, 11.2 X 1015 Btu for petro-leum, and 9.5 X 1015 Btu for natural gas (Parent, 1979). Since coal represents roughly 86 percent of the total U.S. resource, one would expect its use to approximate that percentage of the energy input in the United States. But actually, the percentage of coal in the fossil energy input is only 21 percent. Petroleum and natural gas consumption accounts for nearly 75 percent. Almost half (48 percent) of the fossil energy used in the United States consists of petroleum and its products. Since some 45 percent of this petro-leum must now be imported, it is essential that our primary re-source, coal, be used in increasing amounts. This paper presents



Comments on Coal Liquefaction

L.E. Swabb, Jr.

Year: 1980
Volume: Volume 1
Number: Number 1
DOI: 10.5547/ISSN0195-6574-EJ-Vol1-No1-10
View Abstract

Abstract:
Dr. Hill has given an excellent, comprehensive review of the various coal liquefaction development programs that are now in progress. In view of the limited time, I would like to comment on just one subject-the economics of coal liquefaction and the impact of the economic basis on product cost. This would appear appro-priate to the interests of this audience, as well as an important consideration when evaluating costs quoted by various sources.My comments are based on a commercial plant study design for the Exxon Donor Solvent (EDS) process made in 1975-1976 and published in an EDS project report in January 1978. This study design is now being updated, and the new coal liquids costs are probably going to change. However, the old data will serve toillustrate the point I wish to make.





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