Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 4, Issue 2, Pages 311-345Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0ee00097c
Keywords
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Funding
- Department of Energy/NETL
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Increased demand for liquid transportation fuels coupled with gradual depletion of oil reserves and volatile petroleum prices have recently renewed interest in coal-to-liquids (CTL) technologies. Large recoverable global coal reserves can provide liquid fuels and significantly reduce dependence on oil imports. Direct coal liquefaction (DCL) converts solid coal (H/C ratio approximate to 0.8) to liquid fuels (H/C ratio approximate to 2) by adding hydrogen at high temperature and pressures in the presence or absence of catalyst. This review provides a comprehensive literature survey of the coal structure, chemistry and catalysis involved in direct liquefaction of coal. This report also touches briefly on the historical development and current status of DCL technologies. Key issues, challenges involved in DCL process and directions for the future research are also addressed.
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