Preparation method of hydrogen production composite catalyst

Abstract

The invention relates to a preparation method of a hydrogen production composite catalyst. The preparation method is developed for meeting a requirement of a hydrogen production technology by reforming ethanol and water vapor. The preparation method comprises the steps of taking imvite, nickel nitrate and aluminum nitrate as raw materials, taking deionized water as a solvent, taking sodium hydroxide as a pH (potential of hydrogen) value regulator, preparing a solution, mixing, conducting ion exchange, conducting hydrolytic polymerization in situ, crystallizing, washing, leaching, drying, grinding, roasting, and obtaining a composite catalyst product. The composite catalyst is a nano powder particle; the diameter of the particle is less than or equal to 100nm; and the purity of the product is good, and reaches 99.9%. The preparation method of the hydrogen production composite catalyst is advanced in technology, short in technological process, detailed and accurate in data, safe, stable, reliable and very ideal, and does not pollute an environment.

Description

technical field [0001] The invention relates to a method for preparing a composite catalyst for hydrogen production, which belongs to the technical field of preparation and application of hydrogen production catalysts. Background technique [0002] As a new energy source, hydrogen has the advantages of rich sources, high combustion calorific value, convenient use, clean and pollution-free; there are many methods of hydrogen production, such as: hydrogen production by catalytic reforming of organic matter, hydrogen production by metal replacement, solar photolysis of water Hydrogen production, hydrogen production by electrolysis of water, hydrogen production by pyrolysis of organic matter, hydrogen production by high-energy rays, and hydrogen production by plasma arc; among them, low-carbon alcohols such as methanol and ethanol have attracted the attention of researchers because of their high hydrogen content and low cost; However, methanol is highly toxic and has high storag...

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Problems solved by technology

[0003] Hydrogen production by steam reforming of bioethanol is one of the most important research topics of low-carbon energy. Catalysts are used in the hydrogen production process of steam reforming of ethanol; there are two types of catalysts, one is noble metal catalysts, such as Pt, Rh, Ru, Ir, etc. are catalysts with active components. These catalysts have high activity and high selectivity, but the reaction temperature is high and expensive, which is not conducive to large-scale industrial production; the other is a common metal catalyst, such as Cu , Co, Ni or their alloys are catalysts with active components. The common features of these catalysts are low cost, good low-temperature activity of Cu-based catalysts, but poor C-C bond breaking ability, and easy to generate by-products; Co-based catalysts have excellent options high activity, easy carbon deposition, and poor stability; Ni-based catalysts have high ethanol conversion and hydrogen yield, but poor selectivity; the above two types of catalysts have restricted the hydrogen production technology of biomass ethanol steam reforming development of

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