Preparation method of catalyst for methane steam reforming to produce hydrogen

Abstract

The invention relates to a preparation method of a catalyst for methane steam reforming to produce hydrogen. The catalyst comprises an active component, an auxiliary agent, and a carrier. The preparation method comprises the following steps: processing the catalyst for waste residual oil hydrogenation to produce a catalyst precursor (A); then reducing the catalyst precursor (A) in a reducing atmosphere; adding the reduced catalyst precursor (A) and a polyol solution into a high pressure reactor to carry out hydrogenation reactions, collecting the effluents of the reactions, filtering, drying to obtain a catalyst precursor (B); dissolving an active component precursor and an auxiliary agent precursor into water to prepare a solution (C), adding the catalyst precursor (B), drying, and burning to obtain the catalyst. The catalyst for waste residual oil hydrogenation is fully utilized to produce the provided catalyst, the cost is reduced, moreover, more active components are dispersed on the surface of carriers, the utilization rate of active metal is improved, and the conversation rate of methane and product selectivity are both improved.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for steam reforming of methane to produce hydrogen, in particular to a method for preparing a supported nickel-based catalyst for steam reforming of methane to produce hydrogen. 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 of s...

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

[0005] Although in the prior art, the method for preparing the nickel-based catalyst for 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