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Reforming hydrogen production composite catalyst as well as preparation method and application thereof

A composite catalyst, reforming hydrogen production technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low activity and poor cycle stability of composite catalysts , to achieve the effect of easy control of synthesis conditions, convenient operation and high catalytic activity

Pending Publication Date: 2020-08-04
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of composite catalyst that has catalytic adsorption performance concurrently, further reduce the CO of composite catalyst. 2 The gap between the actual adsorption capacity and the theoretical adsorption capacity, to solve the CO 2 Adsorption enhanced CH 4 / H 2 The problem of low activity and poor cycle stability of the composite catalyst used in the hydrogen production process of O reforming

Method used

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  • Reforming hydrogen production composite catalyst as well as preparation method and application thereof
  • Reforming hydrogen production composite catalyst as well as preparation method and application thereof
  • Reforming hydrogen production composite catalyst as well as preparation method and application thereof

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preparation example Construction

[0027] The invention provides a preparation method of a reforming hydrogen production composite catalyst, comprising the following steps:

[0028] (1) mixing the mixed metal ion salt solution with the precipitant solution to react;

[0029] (2) the product after described reaction is carried out aging crystallization, solid-liquid separation, get precipitation;

[0030] (3) calcining the precipitate to obtain the composite catalyst.

[0031] In the present invention, the mixed metal ion salt solution and the precipitant solution are mixed to carry out the reaction when the reforming hydrogen production composite catalyst is prepared.

[0032] In the present invention, the mixed metal ion salt solution preferably includes calcium ions, nickel ions and cerium ions.

[0033] In the present invention, the concentration of the calcium ions is preferably 0.05-1 mol / L, more preferably 0.3-5 mol / L.

[0034] In the present invention, the ratio of the amount of calcium ions to nickel...

Embodiment 1

[0055] Adopt the method of the present invention to prepare a kind of composite catalyst, comprise the steps:

[0056] (1) Dissolve 25.96g calcium nitrate tetrahydrate, 8.96g nickel nitrate hexahydrate, and 3.34g cerium nitrate hexahydrate in 300mL deionized water to prepare a mixed metal ion salt solution.

[0057] (2) Dissolve 2.91 g of sodium hydroxide and 15.43 g of sodium carbonate in 500 mL of deionized water to obtain a precipitant solution.

[0058] (3) The mixed metal ion salt solution is heated to 80°C under stirring, and the precipitant solution is rapidly added to the mixed metal ion salt solution, and the reaction is continued for 1.5 hours under stirring.

[0059] (4) aging and crystallizing the product obtained in step (3) at 90° C. for 15 h, collecting the precipitate by centrifugation, washing with deionized water, and suction filtration until the filtrate becomes neutral.

[0060] (5) The precipitate obtained in step (4) was dried at 110° C. for 15 hours, an...

Embodiment 2

[0062] Adopt the method of the present invention to prepare a kind of composite catalyst, comprising the steps:

[0063] (1) Dissolve 5.17g calcium sulfate dihydrate, 0.47g nickel sulfate hexahydrate and 1.21g cerium sulfate tetrahydrate in 300mL deionized water to prepare a mixed metal ion salt solution.

[0064] (2) 1.30 g of potassium hydroxide and 4.92 g of sodium carbonate were weighed and dissolved in 700 mL of deionized water to obtain a precipitant solution.

[0065] (3) The mixed metal ion salt solution is heated to 100°C under stirring, and the precipitant solution is quickly added to the mixed metal ion salt solution, and the reaction is continued for 1.0 h under stirring.

[0066] (4) aging and crystallizing the product obtained in step (3) at 80° C. for 20 hours, collecting the precipitate by centrifugation, washing with deionized water, and suction filtration until the filtrate becomes neutral.

[0067] (5) drying the precipitate obtained in step (4) at 140°C fo...

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Abstract

The invention belongs to the technical field of preparation of reforming hydrogen production catalysts and provides a reforming hydrogen production composite catalyst as well as a preparation method and an application thereof. The preparation method comprises the following steps: (1) mixing a mixed metal ion salt solution with a precipitant solution, and reacting; (2) carrying out aging crystallization and solid-liquid separation on a product obtained after the reaction, and taking a precipitate; and (3) roasting the precipitate to obtain the composite catalyst. According to the composite catalyst provided by the invention, the difference between the actual CO2 adsorption capacity and the theoretical adsorption capacity of the composite catalyst is further reduced, and the problems of lowactivity and poor cycling stability of the catalyst used in the CO2 adsorption enhanced CH4 / H2O reforming hydrogen production process are solved.

Description

technical field [0001] The invention relates to the technical field of preparing a reforming hydrogen production catalyst, in particular to a reforming hydrogen production composite catalyst and a preparation method and application thereof. Background technique [0002] CO 2 Adsorption-enhanced steam reforming of methane for hydrogen production is to provide low-cost high-purity H 2 and achieve CO 2 Effective technologies for reducing emissions. The core idea of ​​this technology is to introduce CO 2 Adsorbent that converts CO produced from reforming and water-steam shift reactions 2 Remove in situ, break the original reaction equilibrium, and make the reaction equilibrium to generate H 2 moving in the direction of , so that high-purity H can be directly obtained 2 . Compared with the traditional methane steam reforming hydrogen production process, CH 4 The reaction temperature required for the same conversion can be reduced from 750-900°C to 500-650°C. This process...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J35/00B01J35/10B01J37/03C01B3/40
CPCB01J23/83B01J37/03C01B3/40C01B2203/0227C01B2203/1058B01J35/394B01J35/393B01J35/613B01J35/633Y02P20/52
Inventor 荆洁颖金杰李清冯杰李文英
Owner TAIYUAN UNIV OF TECH
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