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Characteristics of Pt/C-based Catalysts for HI Decomposition in SI process  

Kim, J.M. (Department of Fine Chemicals Engineering and Chemistry, Chungnam National Univ.)
Kim, Y.H. (Department of Fine Chemicals Engineering and Chemistry, Chungnam National Univ.)
Kang, K.S. (New Energy Research Department, Korea Institute of Energy Research)
Kim, C.H. (New Energy Research Department, Korea Institute of Energy Research)
Park, C.S. (New Energy Research Department, Korea Institute of Energy Research)
Bae, K.K. (New Energy Research Department, Korea Institute of Energy Research)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.19, no.3, 2008 , pp. 199-208 More about this Journal
Abstract
HI decomposition was conducted using Pt/C-based catalysts with a fixed-bed reactor in the range of 573 K to 773 K. To examine the change of the characteristic properties of the catalysts, $N_2$ adsorption analyser, a X-ray diffractometer(XRD), and a scanning electron microscopy(SEM) were used before and after the HI decomposition reaction. the effect of Pt loading on HI decomposition was investigated by $CO_2$-TPD. HI conversion of all catalysts increased as decomposition temperature increased. The XRD analysis showed that the sizes of platinum particle became larger and agglomerated into a lump during the reaction. From $CO_2$-TPD, it can be concluded that the cause for the increase in catalytic activity may be attributed to the basic sites of catalyst surface. The results of both b desorption and gasification reaction showed the restriction on the use of Pt/C-based catalyst.
Keywords
HI decomposition$CO_2$-TPD$I_2$ desorption; gasification reaction; basic sites;
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