Cuo/CexZr1-xO2-M high-temperature water gas conversion catalyst in IGCC (Integrated Gasification Combined Cycle) system, and preparation method thereof

Abstract

The invention discloses a Cuo / CexZr1-xO2-M high temperature water gas conversion catalyst in IGCC system, and a preparation method thereof and belongs to the technical field of water gas conversion catalysts. For the catalyst provided by the invention, the copper oxide is used as the active component, the zirconium oxide-cerium oxide composite oxide is used as the carrier, and different types of auxiliaries are also added. The catalyst is characterized in that the content of the active component copper oxide, counted by metal elements, is 10-40wt%; the mass ratio of the cerium oxide to the zirconium oxide is (1:4)-(4:1), the auxiliaries include rare earth elements, such as Y and La, and transition metals, such as Fe, Co and Ni; and the auxiliaries content M is 1-4wt%. The preparation method of the catalyst is a reverse adding coprecipitation method, and such method can be used for improving the specific area and metal dispersity of the catalyst. The Cuo / CexZr1-xO2-M high temperature water gas conversion catalyst has better high-temperature catalytic activity and thermostability, in a 400-500 DEG C reaction temperature region, the Co conversion rate approaches to the balanced conversion rate, and the defect of poor thermostability of the copper-based catalyst is solved. Moreover, the preparation process is relatively simple, so that the catalyst has high practical utilization value.

Description

technical field [0001] The invention relates to an IGCC system high-temperature water-gas shift catalyst, which uses cerium-zirconium solid solution as the carrier, Cu as the active component, and CuO / Ce with different kinds of additives M added. x Zr 1-x o 2 The -M catalyst belongs to the field of water gas shift technology and catalyst technology. Background technique [0002] The industrial application of the water gas shift (WGS) reaction in the integrated gasification combined cycle power generation system (IGCC) has a history of nearly 100 years. It is widely used in the hydrogen production industry and ammonia synthesis industry using coal, oil and natural gas as raw materials, as well as fuel cells. , hydrogen refueling stations and online hydrogen production and other small-scale hydrogen production. The current research focus is on fuel cells, and more catalyst development is directed towards noble metal catalysts. The goal is to reduce the amount of noble metal...

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Problems solved by technology

Chinese patent 200910048316.7 "Catalyst and preparation method for carbon monoxide conversion by water-gas reaction in hydrogen-rich gas", the introduction of rare earth elements into the Cu-Zn-Al system can improve the activity of the catalyst, but the reaction temperature range is still limited to 180-250 ℃, the active temperature range is narrow

Chinese patent 200410103559.3 "Copper-manganese-based high-temperature shift catalyst and its preparation method", adding thermal stabilization additives to copper-manganese aqueous solution, co-precipitation to prepare Cu a mn b o 4 -M is a high-temperature shift catalyst with a single inverse spinel structure, which has improved thermal stability and improved heat resistance stability, but the copper content of the active component in the catalyst is too high, resulting in an increase in catalyst cost

The activity of the catalyst has been improved, but the preparation method adopts an equal volume two-step impregnation method, which is too cumbersome

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