Catalyst for hydrogen production by methanol steam reforming and preparation method and application thereof

Abstract

The invention relates to a catalyst for hydrogen production by methanol steam reforming as well as a preparation method and application of the catalyst. The catalyst is a porous catalyst prepared under the guidance of activated carbon serving as a hard template agent, and comprises Cu and ZrO2, and in metal elements of the catalyst, the mole% of Cu is 5-35%, and the mole% of Zr is 65-95%; a hard template made of the activated carbon is used, the method comprises the following steps: loading a copper component and a zirconium component in pore channels on a skeleton of the activated carbon by virtue of a coprecipitation method, then roasting in air to remove the activated carbon to form a porous Cu / ZrO2 catalyst, and then removing copper species gathered on the surface of the porous Cu / ZrO2catalyst by virtue of acid pickling to expose a sufficient copper-zirconium interface. Compared with the prior art, the catalyst disclosed by the invention shows high catalytic activity and stabilityafter being reduced in an H2 atmosphere, and the reaction conditions are mild, the conversion rate of methanol at 230 DEG C exceeds 95%, and the selectivity of a byproduct CO is lower than 0.5%.

Description

technical field [0001] The invention belongs to the technical field of environmental catalysis, and relates to a catalyst for hydrogen production by steam reforming of methanol, a preparation method and application thereof. Background technique [0002] As we all know, small-scale portable hydrogen production is the key technology for the successful application of hydrogen fuel cells. Hydrogen production by steam reforming of methanol has the advantages of convenient operation, readily available raw materials, short process flow, mild reaction conditions, few by-products, and high hydrogen-to-carbon ratio, so it has attracted much attention from researchers. [0003] At present, precious metal catalysts are mainly used for hydrogen production by steam reforming of methanol, and their high price has become a bottleneck for the widespread promotion of fuel cells. Copper-based catalysts have become a research hotspot due to their low cost, low temperature, high activity and hi...

AI Technical Summary

Problems solved by technology

[0003] At present, the steam reforming of methanol mainly uses precious metal catalysts for hydrogen production, and its high price has become a bottleneck for the widespread promotion of fuel cells.

Copper-based catalysts have become a research hotspot due to their low cost, low temperature, high activity and high hydrogen selectivity, but their poor stability and the generation of a small amount of CO by-products limit their direct application as a hydrogen source for fuel cells.

[0004] In the past ten years, Cu / ZrO 2 Compared with industrial CuZnAl catalysts, the catalyst shows superior catalytic performance, but the current Cu / ZrO 2 The catalyst also has the problem that the surface area of ​​the catalyst is relatively low, which leads to a low copper-zirconium interface in the active center of the catalyst, so that the copper-zirconium component cannot be effectively used, and the catalytic efficiency of the catalyst is poor.

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