Hydrogen production in fluidized bed by chemical-looping cycle |
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Authors: | Gyoung Tae Jin Ho-Jung Ryu Sung-Ho Jo Seung-Yong Lee Sung Real Son Sang Done Kim |
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Affiliation: | (1) Korea Institute of Energy Research, Daejeon, 305-343, Korea;(2) Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea |
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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. This work was presented at the 6 th Korea-China Workshop on Clean Energy Technology held at Busan, Korea, July 4–7, 2006. |
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Keywords: | Chemical-looping Cycle Hydrogen Production Inherent CO2 Capture Redox Mediator |
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