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OVERVIEW OF THE ZECA (ZERO EMISSION COAL ALLIANCE) TECHNOLOGY [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2000.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
803 Kilobytes pages : digital, PDF file
Additional Creators
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We discuss a novel, emission-free process for producing hydrogen or electricity from coal. Although we focus on coal, the basic approach is compatible with any carbonaceous fuel. The process uses cyclical carbonation of calcium oxide to promote the production of hydrogen from carbon and water. The carbonation of the calcium oxide removes carbon dioxide from the reaction products and provides the additional energy necessary to complete hydrogen production without the need for the combustion of carbon. The calcination of the resulting calcium carbonate is accomplished using the high temperature waste heat from solid oxide fuel cells, which generate electricity from hydrogen fuel. Converting waste heat back to useful chemical energy allows the process to achieve very high conversion efficiency from fuel energy to electrical energy. As the process is essentially closed-loop, the process is able to achieve zero emissions if the concentrated exhaust stream of CO₂ is sequestered. Carbon dioxide disposal is accomplished by the production of magnesium carbonate from ultramafic rock. The end-products of the sequestration process are stable, naturally-occurring minerals. Sufficient high quality ultramafic deposits exist to easily handle all the world's coal.
Report Numbers
E 1.99:la-ur-00-6002
la-ur-00-6002
Subject(s)
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Note
Published through SciTech Connect.
12/01/2000.
"la-ur-00-6002"
Conference title not supplied, Conference location not supplied, Conference dates not supplied.
K. LACKNER; H. ZIOCK.
Funding Information
W-7405-ENG-36
View MARC record | catkey: 13831792