Anti-carbon deposition nimethyl methane steam reforming hydrogen production catalyst and preparation method thereof

Abstract

The invention relates to an anti-carbon-deposition Ni-based catalyst for hydrogen production by methane steam reforming and a preparation method thereof. By taking lanthanum nitrate, praseodymium nitrate, samarium nitrate, yttrium nitrate, zirconium nitrate, zirconium carbonate, zirconium oxychloride, and the like as precursors and taking ammonia as a precipitant, a pyrochlore composite oxide is prepared through using a coprecipitation method; and then the pyrochlore composite oxide is mixed with alumina by using a mechanical mixing method so as to obtain a pyrochlore alumina composite carrier. Nickel nitrate, nickel chloride, nickel sulfate, nickel oxalate and the like serving as nickel sources are loaded on the pyrochlore alumina composite carrier through direct immersion. The loading capacity of nickel in the catalyst accounts for 5-30% of the weight of the catalyst, the pyrochlore content of the catalyst is 5-50%, and the alumina content of the catalyst is 20-90%. By taking the pyrochlore alumina composite oxide as a carrier, the reaction activity and anti-carbon-deposition performance of the catalyst can be greatly increased; the preparation method of the catalyst is simple; and the catalyst has excellent catalytic activity and stability to methane steam reforming in a stationary bed.

Description

technical field [0001] The invention belongs to the field of catalysis, and relates to a hydrogen production catalyst for steam reforming of methane. Background technique [0002] Hydrogen is an important industrial raw material and reducing agent. It is widely used in various fields of national economy, such as fertilizer, petrochemical, food, fine chemical, pharmaceutical, electronics, metallurgy, scientific research and other industries. At the same time, hydrogen is also an important green new energy. As an energy source, hydrogen energy will play a pivotal role on the world energy stage in the 21st century. It is an extremely superior new energy source. Its main advantages are high combustion calorific value; the only product of combustion is water, which is very clean; it can be made from water, and its resources are relatively abundant. But because hydrogen is a secondary energy source, there is no free pure hydrogen in nature and the atmosphere, its production not ...

AI Technical Summary

Problems solved by technology

However, its catalytic activity and stability cannot well meet the needs of the industrialization of hydrogen production by steam reforming of methane.

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