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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 31, 2006
Accepted November 14, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hydrogen production in fluidized bed by chemical-looping cycle

Gyoung Tae Jin^† Ho-Jung Ryu Sung-Ho Jo Seung-Yong Lee Sung Real Son¹ Sang Done Kim¹

Korea Institute of Energy Research, Daejeon 305-343, Korea ¹Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea

gtjin@kier.re.kr

Korean Journal of Chemical Engineering, May 2007, 24(3), 542-546(5), 10.1007/s11814-007-0096-5

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Abstract

To investigate the feasibility of a chemical-looping hydrogen generation system, we investigated the reduction and water splitting reaction characteristics for three mediators and two reducing gas in a bubbling fluidized bed reactor (0.02 m I.D.). For three oxygen carrier particles (NiO/bentonite, Fe2O3/bentonite, (NiO : Fe2O3)/bentonite), hydrogen was used as a reduction gas and water was used as an oxidation gas. For (NiO : Fe2O3)/bentonite particle, carbon monoxide, which is the main component in the syngas from coal or heavy residue, was used as a reducing gas to check reactivity for the carbon containing fuels and carbon deposition characteristics. Based on the reactivity tests, (NiO : Fe2O3)/bentonite particle was selected as the best mediator for the chemical-looping hydrogen generation system to achieve stable continuous operation.

Keywords

Chemical-looping Cycle Hydrogen Production Inherent CO2 Capture Redox Mediator

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