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Metrology Institute of Japan
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Biomedical Research Institute
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Advanced Manufacturing Research Institute
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  • [Show abstract] [Hide abstract]
    ABSTRACT: Fischer-Tropsch (FT) synthesis activity and the stability of a Co/SiO2 catalyst modified with Mn- and Zr were examined under various practical conditions. Dependence of FT synthesis on reaction pressure and bench-scale FT synthesis were investigated. Evaluating catalyst lifetime during continuous FT reactions was conducted. The Co + Mn + Zr/SiO2 catalyst exhibited relatively greater activity and stable reactivity for 168 h. Sulfur resistance of catalysts were investigated and results showed that the presence of 4 ppm H2S drastically affected catalytic activity. The Co + Mn + Zr/SiO2 catalyst exhibited greater activity even with H-2 presence and the sulfur poisoning rate was almost similar on both Co + Mn + Zr/SiO2 and Co/SiO2 catalysts.
    Catalysis Communications 12/2014; 57:36–39. DOI:10.1016/j.catcom.2014.07.037
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    ABSTRACT: MgO-templated mesoporous carbons with high specific surface areas were employed for the electrode materials of electric double layer capacitors (EDLCs) in low temperature ionic liquids. The mesoporous carbons exhibit strongly enhanced capacitance in ionic liquids at 20 to −40 °C compared to conventional activated carbons. Mesopores in the carbon electrodes provide a smooth pathway for the ions, and minimize the temperature influence on the diffusion resistance of the ions. Thus, this paper confirms that mesoporous carbons work as electrode materials to achieve highly enhanced capacitances below 0 °C in ionic liquids, which leads to wide ranging applications of EDLC devices.
    Journal of Power Sources 12/2014; 271:377–381. DOI:10.1016/j.jpowsour.2014.08.008
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    ABSTRACT: Effect of crystal phase and pore structure of Al2O3 support was examined in order to improve the activity of Co/Al2O3 catalysts for FT synthesis. Total 18 kinds of Al2O3 supports having different crystal phase and pore structures were prepared by the calcination of commercial boehmite and gibbsite under various conditions. Cobalt was loaded on these Al2O3 supports by the impregnation, drying and calcination. Activity of Co/Al2O3 catalyst for FT synthesis was evaluated with a continuously stirred tank reactor. Structure of Co particles and activity of Co/Al2O3 catalysts strongly depended on the pore structure (i.e. surface area and pore size) of Al2O3 support rather than the crystal phase. Among the examined samples, the highest activity was obtained over the catalyst, which was prepared from theta-Al2O3 having the moderate surface area (84 m(2) g(-1)). When Al2O3 supports having the moderate surface area were used, the formation of Co particles having high dispersion and relatively uniform size was promoted by pores of suitable size and led to the enhancement of overall catalytic activity.
    Journal of Molecular Catalysis A Chemical 11/2014; 394:22–32. DOI:10.1016/j.molcata.2014.06.034


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    AIST Tsukuba Central 2, 1-1-1 Umezono, 305-8568, Tsukuba, Ibaraki, Japan
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Top publications last week by downloads

The Journal of sports medicine and physical fitness 10/2006; 46(3):425-30.
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