METHANE STEAM REFORMING, USING NICKEL/ALUMINA NANOCOMPOSITE CATALYST OR NICKEL/SILICA-ALUMINA HYBRID NANOCOMPOSITE CATALYST

摘要

The present invention relates to a methane steam reforming method using a nickel/alumina nanocomposite catalyst. More particularly, the present invention relates to a method for carrying out steam reforming of methane with a high methane conversion ratio, even under a relatively severe reaction condition including a high space velocity or low steam supply, by using a nickel/alumina nanocomposite catalyst including a support in which nickel metal nanoparticles are supported uniformly at a high content through a melt impregnation process, and a catalyst used therefor. In addition, according to the present invention, the catalyst obtained by the melt impregnation process is used as a first catalyst and mixed with a nickel silica yoke-shell catalyst as a second catalyst to provide a nickel/silica-alumina hybrid nanocatalyst. When applying the hybrid nanocatalyst to a methane steam reforming reaction, it is possible to obtain higher catalytic activity even at a higher temperature of 700C or more, and thus to carry out steam reforming of methane with a high methane conversion ratio.