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황-요오도 열화학 수소제조 공정에서 다양한 크기의 Cu/Fe/Al2O3 구형 촉매를 이용한 삼산화항 분해
유계상,정광덕 한국수소및신에너지학회 2008 한국수소 및 신에너지학회논문집 Vol.19 No.3
Cu/Fe/Al2O3 granules with various sizes have been prepared by a combination of sol-gel and oil drop method for the use in sulfur trioxide decomposition, a subcycle in thermochemical sulfur-iodine cycle to split water in the hydrogen and oxygen. The size of composite granules have been mainly changed by the flow-rate of the gel mixture before dropping in the synthesis. The structural properties of the samples were comparable with granule size. In the reaction, the catalytic activity was enhanced by decreasing size in the entire reaction temperature ranges.
구형 철-알루미나 입자 제조 및 피셔-트롭시 반응을 위한 전처리 조건 확립
유계상,정광덕,이동준 한국수소및신에너지학회 2008 한국수소 및 신에너지학회논문집 Vol.19 No.6
Fe/Al2O3 composite granules were prepared by combining sol-gel/oil drop method. The shape of granules were mainly determined by composition and concentration of aluminum precursor. The composite granule with the lowest aluminum concentration was synthesized with 0.75M boehmite solution. The prepared granules were tested as a catalyst in the plug-flow reactor for Fischer-Tropsch synthesis. Before the reaction, catalysts were activated by hydrogen reduction and synthesis gas treatment. The activation conditions and aluminum concentration have affected catalytic performance significantly.