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A Chemical Heat Pump With An Endothermic And Reversible Chemical System Incorporated

Published online by Cambridge University Press:  15 February 2011

M. Tsuji ,
Y. Wada ,
T. Kodama ,
N. Hasegawa  and
Y. Tamaura
M. Tsuji
Affiliation:
Department of Chemistry, Research Center for Carbon Recycling & Utilization, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152, JAPAN
Y. Wada
Affiliation:
Department of Chemistry, Research Center for Carbon Recycling & Utilization, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152, JAPAN
T. Kodama
Affiliation:
Department of Chemistry, Research Center for Carbon Recycling & Utilization, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152, JAPAN
N. Hasegawa
Affiliation:
Department of Chemistry, Research Center for Carbon Recycling & Utilization, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152, JAPAN
Y. Tamaura
Affiliation:
Department of Chemistry, Research Center for Carbon Recycling & Utilization, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152, JAPAN
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Abstract

A conceptual design of chemical heat pump system with reactive ceramics incorporated has been proposed and exemplified by several chemical reactions on activated metal oxides. It functions at temperatures of waste heat. The system involves the following endothermic reactions; (1) activation of metal oxide ceramics to activated ceramics using an oxygen-free inert gas, (2) H2O decomposition by the activated ceramics to form H2 gas at 300°C, (3) formation of CH4 from H2 and CO2 at 200–300°C, (4) CO2 decomposition to gaseous CO on activated oxide ceramics at 600–700°C. The working materials are typically magnetite, metal-bearing ferrites, transition metal-modified magnetite and other metal oxides. These basic reactions have been demonstrated to occur at temperatures of waste heat. The chemical heat pump will be effectively operated by incorporating their oxide membrane into the system. These findings have facilitated us to exploit a new field of research work. The above integrated chemical system may help the mitigation of CO2 in the global scale.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 344: Symposium I – Materials and Processes for Environmental Protection , 1994 , 301
Copyright
Copyright © Materials Research Society 1994

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References

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