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Details

Zero emission coal.

DE2001768912

Publication Date	2000
Personal Author	Ziock, H.; Lackner, K.
Page Count	8
Abstract	We discuss a novel, emission-free process for producing hydrogen or electricity from coal. Even though we focus on coal, the basic design 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 additional combustion of carbon. The calcination of the resulting calcium carbonate is accomplished using the high temperature waste heat from solid oxide fuel cells (SOFC), 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 CO(sub 2) 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 rich ultramafic deposits exist to easily handle all the world's coal.
Keywords	Gaseous wastes Air pollution Calcium carbonates Calcium oxides Carbon dioxide Coal Hydrogen fuels Hydrogen production Magnesium carbonates Solid electrolyte fuel cells Waste heat Coal gasification Electric power Fossil Fuel Power Plants Zero emission coal
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	68A - Air Pollution & Control 97R - Environmental Studies
Corporate Authors	Los Alamos National Lab., NM.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200124
Contract Number	W-7405-ENG-36

Zero emission coal.

Zero emission coal.
DE2001768912

Publication Date	2000
Personal Author	Ziock, H.; Lackner, K.
Page Count	8
Abstract	We discuss a novel, emission-free process for producing hydrogen or electricity from coal. Even though we focus on coal, the basic design 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 additional combustion of carbon. The calcination of the resulting calcium carbonate is accomplished using the high temperature waste heat from solid oxide fuel cells (SOFC), 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 CO(sub 2) 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 rich ultramafic deposits exist to easily handle all the world's coal.
Keywords	Gaseous wastes Air pollution Calcium carbonates Calcium oxides Carbon dioxide Coal Hydrogen fuels Hydrogen production Magnesium carbonates Solid electrolyte fuel cells Waste heat Coal gasification Electric power Fossil Fuel Power Plants Zero emission coal
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	68A - Air Pollution & Control 97R - Environmental Studies
Corporate Authors	Los Alamos National Lab., NM.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200124
Contract Number	W-7405-ENG-36