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

A technology of cexzr1-xo2-m and shift catalyst, which is applied in the field of water gas shift process and catalyst, can solve the problems of high content of copper in active components, increased cost of catalyst, narrow active temperature zone, etc., achieves uniform distribution and overcomes poor thermal stability , improve the effect of interaction

Inactive Publication Date: 2013-08-28
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 t

Method used

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

Examples

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Embodiment example 1

[0017] At room temperature, 3.80 g of copper nitrate and 12.75 g of ceric ammonium nitrate were weighed and dissolved in 200 ml of deionized water to prepare a mixed salt solution. Prepare a 0.5mol / L KOH solution, add the above mixed salt solution dropwise to the KOH solution under stirring with a polytetrafluoroethylene stirring paddle, control the pH value to 9-11, after the dropwise addition, stir for 3 hours, and let it stand for aging for 18 hours , and then filtered, washed, dried at 120°C for 12 hours, and roasted at 600°C for 4 hours to obtain a copper-based high-temperature water-gas shift reaction catalyst A. The active component, copper oxide, has a content of 20% in terms of metal elements.

Embodiment example 2

[0019] At room temperature, weigh 3.80 g of copper nitrate, 10.20 g of cerium ammonium nitrate, and 1.74 g of zirconyl nitrate, and dissolve them in 200 ml of deionized water to prepare a mixed salt solution. Prepare a 0.5mol / L KOH solution, add the above mixed salt solution dropwise to the KOH solution under stirring with a polytetrafluoroethylene stirring paddle, control the pH value to 9–11, after the dropwise addition, stir for 3 hours, and let it stand for 18 hours , then filtered, washed, dried at 120°C for 12h, and roasted at 600°C for 4h to obtain a copper-based high-temperature water-gas shift reaction catalyst B. The active component copper oxide, calculated as a metal element, has a content of 20%, and cerium oxide and The mass ratio of zirconia is 4:1.

Embodiment example 3

[0021] At room temperature, 3.80 g of copper nitrate, 8.49 g of cerium ammonium nitrate, and 2.90 g of zirconium oxynitrate were weighed and dissolved in 200 ml of deionized water to prepare a mixed salt solution. Prepare a 0.5mol / L KOH solution, add the above mixed salt solution dropwise to the KOH solution under stirring with a polytetrafluoroethylene stirring paddle, control the pH value to 9–11, after the dropwise addition, stir for 3 hours, and let it stand for 18 hours , then filtered, washed, dried at 120°C for 12h, and roasted at 600°C for 4h to obtain a copper-based high-temperature water-gas shift reaction catalyst C. The active component of copper oxide is 20% in terms of metal elements. The mass ratio of zirconia is 2:1.

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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...

Claims

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Application Information

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IPC IPC(8): B01J23/83C01B3/16
CPCY02P20/52
Inventor 李春山姜黎王木荣李增喜张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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