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Report No.

Gas permeation characteritics of silicon carbide membranes prepared with an immersion of a precursor film

Takeyama, Akinori; Sugimoto, Masaki; Yoshikawa, Masahito

Silicon carbide (SiC) films as a hydrogen separation membrane were prepared using a novel preparation technique. The films were obtained by a coating of precursor films on porous alumina supports followed by an immersion into cycohexane, curing in an inert atmosphere and pyrolisis. A selectivity of the film, which is defined as the ratio of the amount of hydrogen (H$$_{2}$$) to nitrogen (N$$_{2}$$) which passed thorough the membrane, was increased up to 6.1 as increasing the immersion time. This is supposed that precursor in pores is dissolved by cyclohexane and pores are filled with the precursor solution, which leads to a decrease of the pore diameter and an improvement of the selectivity.



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