A kind of preparation method of hydrogen production catalyst by steam reforming of methane

Abstract

The invention relates to a method for preparing a catalyst for steam reforming of methane to produce hydrogen. The catalyst includes an active component, an auxiliary agent and a carrier. The preparation method firstly dissolves the precursor of the active component in water to obtain a solution A; then Adding carrier, after aging, drying, and roasting, the catalyst precursor B is obtained; the catalyst precursor B is reduced by using a reducing atmosphere; the reduced catalyst precursor B and the polyol solution are added to the reactor for hydrogenation reaction , place the reaction effluent, then filter and dry to obtain catalyst precursor C; dissolve the active component precursor and auxiliary agent precursor in water to obtain solution D, then add catalyst precursor C, after drying and roasting, obtain catalyst. The method of the invention promotes the dispersion of more active components on the carrier surface, not only improves the utilization rate of active metals, but also improves the conversion rate of methane and the selectivity of products.

Description

technical field [0001] The invention relates to a preparation method of a hydrogen production catalyst by steam reforming of methane, in particular to a preparation method of a supported nickel-based catalyst for hydrogen production by steam reforming of methane. Background technique [0002] Methane is rich in resources and has a high hydrogen-to-carbon ratio, making it a good raw material for hydrogen production. Hydrogen, as an efficient and clean secondary energy source, will become one of the main energy sources in the future society. In recent years, hydrogen, as the raw material of fuel cells, has incomparable advantages compared with other fuels, such as high calorific value of hydrogen, no air pollution, etc. The application of hydrogen energy solves the problem of energy shortage on the one hand, and on the other It does not cause environmental pollution. [0003] At present, there are two main ways to produce hydrogen from methane: one is through the production ...

AI Technical Summary

Problems solved by technology

Studies have shown that when noble metals Ru, Rh, Pd, etc. are loaded on a suitable carrier, they all have high reactivity and anti-carbon deposition performance, but the disadvantage of noble metals is that they are expensive; among non-noble metals, nickel catalysts have relatively high High reactivity, Ni / Al is generally used 2 o 3 Catalyst, the reaction conditions are 1.5~3MPa, 850~900℃, the generated H 2 / CO ratio is about 3

[0008] Although in the prior art, the method for preparing the nickel-based catalyst for the steam reforming of methane can obtain a catalyst with better activity, but because the reaction is a fast reaction (this fast reaction is generally under the condition of mass transfer control) The reaction is completed when the reactant reaches the outer surface of the catalyst, so the inner surface of the catalyst does not contribute much to the target reaction, which results in a lower metal utilization rate in the carrier channel and increases the cost of the catalyst. At the same time, it will also accelerate the deep oxidation of the product