Aerogel Derived Catalysts
نویسندگان
چکیده
منابع مشابه
Biodiesel synthesis using K2CO3/Al–O–Si aerogel catalysts
In this study, catalysts for fatty acid methyl esters (FAME or biodiesel) synthesis with K2CO3 as the active component on an alumina/silica support were synthesized using the sol–gel method, which was followed by drying the “dense” wet gels with supercritical carbon dioxide to obtain the aerogels. The prepared catalysts were characterized by XRD analysis, FTIR spectroscopy and N2 physisorption ...
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Hyun-Joong Kim, Hyung-Sang Park, Tae-Hoon Lim, and Dong Jin Suh Clean Technology Research Center, Korea Institute of Science and Technology, P.O. Box 131 Cheongryang, Seoul 136-791 ( Korea) Department of Chemical & Biological Engineering, Sogang University, C.P.O. Box 1142 Seoul 121-742, (Korea) Fuel Cell Research Center, Korea Institute of Science and Technology, P.O. Box 131 Cheongryang, Seou...
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Optical transmission measurements were made on 98% porosity silica aerogel samples under various degrees of uniaxial strain. Uniaxially compressed aerogels exhibit large birefringence, proportional to the amount of compression, up to the 15% strain studied. The birefringence is mostly reversible and reproducible through multiple compression-decompression cycles. Our study demonstrates that unia...
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We report optofluidic waveguides made by filling microchannels in aerogel with water. The aerogel cladding is a nanoporous material with an extremely low refractive index of ~1.05, giving a large index step from the water core. Channels were formed by removing embedded optical fibers, which could be nonuniform or multiple. The porosity of the aerogel allowed air to be displaced from the channel...
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Glass states formed in the superfluid 3 He confined in aerogel are discussed. If the short range order corresponds to the A-phase state, the glass state is nonsuperfluid in the long wave length limit. The superfluidity can be restored by application of a small mass current. Transitions between the superfluid and nonsuperfluid glass states can be triggered by small magnetic field and by the chan...
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ژورنال
عنوان ژورنال: MRS Proceedings
سال: 1996
ISSN: 0272-9172,1946-4274
DOI: 10.1557/proc-454-225