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This work is investigated for the catalytic decomposition of hydrogen iodide (HI). Platinum was used as active material by loading on ZrO2-SiO2 mixed oxide in HI decomposition reaction. To obtain high and stable conversion of hydrogen iodide in severe condition, it was required to improve catalytic activity. For this reason, a method increasing dispersion of platinum was proposed in this study. In order to get high dispersion of platinum, zirconia was incorporated in silica by sol-gel synthesis. Incorporating zirconia influence increasing platinum dispersion and BET surface area as well as decreasing deactivation of catalysts. It should be able to stably product hydrogen for a long time because of inhibitive deactivation. HI decomposition reaction was carried out under the condition of 450℃ and 1 atm in a fixed bed reactor. Catalysts analysis methods such as N2 adsorption/desorption analysis, X-ray diffraction, X-ray fluorescence, ICP-AES and CO gas chemisorption were used to measurement of their physico-chemical properties.

A Study on Characteristics of HI Decomposition Using Pt Catalysts on ZrO2-SiO2Mixed Oxide

A Study on Characteristics of HI Decomposition Using Pt Catalysts on ZrO₂-SiO₂Mixed Oxide