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Pt 촉매를 이용한 HI분해반응에서 지지체에 따른 영향
고윤기,박주식,강경수,배기광,김영호 한국수소및신에너지학회 2011 한국수소 및 신에너지학회논문집 Vol.22 No.4
HI decomposition step certainly demand catalytic reaction for efficient production of hydrogen in SI process. Platinum catalyst can apply to HI decomposition reaction as well as hydrogenation or dehydrogenation. Generally, noble metal is used as catalyst which is loaded form for getting high dispersion and wide active area. In this study, Pt was loaded onto zirconia, ceria, alumina, and silica by impregnation method. HI decomposition reaction was carried out under the condition of 450℃, 1atm, and 167.76h^-1 (WHSV) in a fixed bed reactor for measuring catalytic activity. And property of a catalyst was observed by BET, TEM,XRD and chemisoption analysis. On the basis of experimental results, we discussed about conversion of HI according to physical properties of the loaded Pt catalyst onto each support.
ZrO2-SiO2 복합산화물에 담지된 백금 촉매의요오드화수소 분해 특성 연구
고윤기,박은정,배기광,박주식,강경수,조원철,정성욱,김창희,김영호 한국수소및신에너지학회 2013 한국수소 및 신에너지학회논문집 Vol.24 No.5
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.