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Research Papers

Energy and Exergy Analysis of Gasifier-Based Coal-to-Fuel Systems

[+] Author and Article Information
Yunhua Zhu1

Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352yunhua.zhu@pnl.gov

Sriram Somasundaram, James W. Kemp

Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352

1

Corresponding author.

J. Energy Resour. Technol 132(2), 021008 (Jun 11, 2010) (8 pages) doi:10.1115/1.4001572 History: Received February 27, 2009; Revised March 29, 2010; Published June 11, 2010; Online June 11, 2010

National energy security concerns related to liquid transportation fuels have revived interests in alternative liquid fuel sources. Coal-to-fuel technologies feature high efficiency energy conversion and environmental advantages. While a number of factors are driving coal-to-fuel projects forward, there are several barriers to wide commercialization of these technologies such as financial, construction, operation, and technical risks. The purpose of this study is to investigate the performance features of coal-to-fuel systems based on different gasification technologies. The target products are the Fischer–Tropsch synthetic crude and synthetic natural gas. Two types of entrained-flow gasifier-based coal-to-fuel systems are simulated and their performance features are discussed. One is a single-stage water quench cooling entrained-flow gasifier, and another one is a two-stage syngas cooling entrained-flow gasifier. The conservation of energy (first law of thermodynamics) and the quality of energy (second law of thermodynamics) for the systems are both investigated. The results of exergy analysis provide insights about the potential targets for technology improvement. The features of different gasifier-based coal-to-fuel systems are discussed. The results provide information about the research and development priorities in future.

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Copyright © 2010 by American Society of Mechanical EngineersThe United States Government retains, and by accepting the article for publication, the publisher acknowledges that the United States Government retains, a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for United States Government purposes.
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Figures

Grahic Jump Location
Figure 1

Conceptual diagram for coal-to-FT oil/SNG systems

Grahic Jump Location
Figure 2

Exergy analysis results of a two-stage SC gasifier-based coal-to-FT oil system

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