A method for treating a low-pd supported catalyst with plasma and its application in hydrogen production by methanol steam reforming

Abstract

The application discloses a method for plasma treating a low-Pd supported catalyst and application of the method in hydrogen production by methanol steam reforming. The method for plasma treating the low-Pd supported catalyst comprises the following steps: (1) a Pd precursor solution is impregnated onto a ZnTiO3 carrier by using an equal-volume impregnation method, and the obtained mixture is dried and calcined to prepare a Pd / ZnTiO3 catalyst precursor; and (2) the Pd / ZnTiO3 catalyst precursor is placed in an atmospheric pressure intelligent fixed bed experimental device equipped with a plasma generator, and plasma discharge treatment is carried out under an H2 / Ar mixed gas atmosphere. The catalyst provided by the application comprises a ZnTiO3 carrier and PdZn beta alloy nanoparticles supported on the carrier, the PdZn beta alloy nanoparticles have a particle size of 3-5 nm, and the Pd metal dispersion degree is 40-60%. The method provided by the application realizes reduction and dispersion of Pd species under low-temperature and low-power conditions, effectively inhibits agglomeration of metal particles, and significantly improves the hydrogen production activity of the catalyst in methanol steam reforming.

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