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http://dx.doi.org/10.7316/khnes.2012.23.1.001

Charateristics of Hydrogen Iodide Decomposition using Ni-Pt Bimetallic Catalyst in Sulfur-Iodine Process  

Kim, Soo-Young (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Go, Yoon-Ki (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Park, Chu-Sik (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Bae, Ki-Kwang (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Kim, Young-Ho (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.23, no.1, 2012 , pp. 1-7 More about this Journal
Abstract
This study was performed to develop a low Pt content catalyst as a catalyst for HI decomposition in S-I process. Bimetallic catalysts added various amounts of Pt on a silica supported Ni catalyst were prepared by impregnation method. HI decomposition was carried out using a fixed bed reactor. As a result, Ni-Pt bimetallic catalyst showed enhanced catalytic activity compared with each monometallic catalyst. Deactivation of Ni-Pt catalyst was not observed while deactivation of Ni monometallic catalyst was rapidly occurred in HI decomposition. The HI conversion of Ni-Pt bimetallic catalyst was increased similar to Pt catalyst with increase of the reaction temperature over a temperature range 573K to 773K. From the TG analysis, it was shown that $NiI_2$ remained on the Ni(5.0)-Pt(0.5)/$SiO_2$ catalyst after the HI decomposition reaction was decomposed below 700K. It seems that small amount of Pt in bimetallic catalyst increase the decomposition of $NiI_2$ generated after the decomposition of HI. Consequently, it was considered that the activity of Ni-Pt bimetallic catalyst was kept during the HI decomposition reaction.
Keywords
S-I process; HI decomposition; Ni-Pt bimetallic catalyst; $NiI_2$;
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Times Cited By KSCI : 1  (Citation Analysis)
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