Underground Coal Thermal Treatment as a Potential Low-Carbon Energy Source

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Publication Type report
Creator Eddings, Eric
Contributor Kerry E. Kelly, Ding Wang, Michal Hradisky, Geoffrey D. Silcox, Philip J. Smith, David W. Pershing
Title Underground Coal Thermal Treatment as a Potential Low-Carbon Energy Source
Description We evaluate a novel energy strategy, underground coal thermal treatment (UCTT); it involves slowly pyrolyzing coal in-situ, transforming it to synthetic gas stream containing hydrogen and low molecular-weight hydrocarbons, liquid fuel and char. This evaluation assesses the life-cycle energy and greenhouse gas (GHG) impacts of UCTT for all process stages. It is based on experimental results at two scales, a simple heat-transfer model and literature results. The results show that UCTT can produce a high-quality liquid product and a gas mixture. UCTT's GHG emissions are in the range of those reported for in situ processing of oil shale. Net energy returns (NERs) of 0.48- 4.7 are in the range reported oil sands (2.8) and oil shale (0.48 - 2.6). Product yield at low temperatures, heater temperature, the number of heaters and the moisture content of the coal are key factors in determining the feasibility of the UCTT process.
Type Text
Publisher University of Utah, Institute for Clean and Secure Energy
Subject Coal pyrolysis, carbon capture, in situ coal, greenhouse gas emissions, net energy return
Language eng
Rights Management (c) University of Utah, Institute for Clean and Secure Energy
Format Medium application/pdf
ARK ark:/87278/s6sz1pcw
Setname ir_icse
Date Created 2020-04-20
Date Modified 2020-04-20
ID 1542009
Reference URL https://collections.lib.utah.edu/ark:/87278/s6sz1pcw
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