Catalyst carrier treatment method, catalyst for preparing methanol through carbon dioxide hydrogenation, and preparation method and application of catalyst

A catalyst carrier and treatment method technology, which is applied in the catalyst carrier, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of reducing methanol selectivity and low selectivity.

Active Publication Date: 2021-04-30
XIAMEN UNIV
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  • Abstract
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Problems solved by technology

However, industrial CuZnAl in CO 2 A large number of reverse water gas shift side reactions occur in the hydrogenation of methanol, which greatly reduces ...

Method used

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  • Catalyst carrier treatment method, catalyst for preparing methanol through carbon dioxide hydrogenation, and preparation method and application of catalyst
  • Catalyst carrier treatment method, catalyst for preparing methanol through carbon dioxide hydrogenation, and preparation method and application of catalyst
  • Catalyst carrier treatment method, catalyst for preparing methanol through carbon dioxide hydrogenation, and preparation method and application of catalyst

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preparation example Construction

[0051] The present invention also provides a method for preparing a catalyst for hydrogenation of carbon dioxide described in the above technical proposal, comprising the following steps:

[0052] Mixing the active component precursor and water to obtain the active component precursor solution;

[0053] The carrier is immersed in the active component precursor solution to obtain a carrier for loading the active component; the carrier is obtained by processing a metal oxide through the treatment method described in the above technical scheme; the metal oxide includes TiO 2 , ZrO 2 or ZnO;

[0054] The carrier loaded with the active components is freeze-dried and calcined in sequence to obtain a catalyst for hydrogenation of carbon dioxide to produce methanol.

[0055] The invention mixes the active component precursor and water to obtain the active component precursor solution. In the present invention, the active component precursor is preferably a metal salt of the aforeme...

Embodiment 1

[0072] Weigh a certain amount of NaBH according to the mass ratio of 1:1 4 with rutile TiO 2 -R powder, grind for 30min, then put it into a tube furnace and bake it at 350℃ for 4h under the atmosphere of Ar gas, cool to room temperature, put it in water and let it stand for 4h, repeat centrifugation with water and ethanol several times, and freeze-dry in vacuum Machine dried under 20Pa vacuum for 24h, take out the carrier sample and mark it as TiO 2 -Rov with a specific surface area of ​​18m 2 / g;

[0073] 0.84g gold chlorate was mixed with deionized water for ultrasonic 20min to obtain an active component precursor solution with a concentration of 0.37g / mL; 1.6g of the TiO 2 -Rov is impregnated into the active component precursor solution, left to stand for 24 hours, dried in a vacuum freeze dryer at 20 Pa for 24 hours, and then placed in a tube furnace and calcined at 500 °C for 4 hours in an Ar gas atmosphere to obtain Au / TiO 2 -Rov Catalyst.

[0074] The Au / TiO obta...

Embodiment 2

[0076] Weigh a certain amount of NaBH according to the mass ratio of 1:1 4 with anatase TiO 2 -A powder, grind for 30min, then put it into a tube furnace and roast at 350°C for 4h under the atmosphere of Ar gas, cool to room temperature, put it in water and let it stand for 4h, repeat centrifugation with water and ethanol several times, and freeze-dry in vacuum Machine dried under 20Pa vacuum for 24h, take out the carrier sample and mark it as TiO 2 -Aov with a specific surface area of ​​16m 2 / g;

[0077] 1.5g copper nitrate and deionized water were mixed and ultrasonicated for 20min to obtain an active component precursor solution with a concentration of 0.75g / mL; 1.6g of the TiO 2 - Aov is impregnated into the active component precursor solution, left to stand for 24 hours, dried with a vacuum freeze dryer at 20Pa vacuum for 24 hours, and then placed in a tube furnace and calcined at 500 ° C for 4 hours under an Ar gas atmosphere to obtain Cu / TiO 2 - Aov catalyst.

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Abstract

The invention provides a catalyst carrier treatment method, a catalyst for preparing methanol through carbon dioxide hydrogenation and a preparation method and application of the catalyst, which relate to the technical field of catalysts. The treatment method provided by the invention comprises the following steps of grinding and mixing a catalyst carrier and NaBH4 to obtain a mixture, roasting the mixture under a protective atmosphere condition to obtain a roasted material, and sequentially washing and freeze-drying the roasted material to obtain the treated catalyst carrier. By adopting the method provided by the invention to treat the catalyst carrier, the catalytic activity of the catalyst can be improved, and the conversion rate of carbon dioxide and the selectivity of methanol are improved. In addition, the treatment method provided by the invention is simple, easy to operate and short in production period.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a method for treating catalyst carriers, a catalyst for hydrogenation of carbon dioxide to methanol, and a preparation method and application thereof. Background technique [0002] Since industrialization, with the extensive use of fossil energy, CO 2 A large amount of emissions lead to global warming, the melting of Arctic and Antarctic glaciers, and the increasing number of natural disasters. Nature consumes CO 2 The main way is the photosynthesis of plants, but according to statistics forests and oceans absorb CO 2 just for atmospheric CO 2 A third of the total, most of it still accumulates in the atmosphere. To reduce CO 2 emissions, the researchers attempted to pass the CO 2 Hydrogenation to synthesize more valuable chemical products. Methanol is a widely used product, with CO 2 Synthesizing methanol as a raw material can realize the cycle transformation of "exhaus...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/06B01J23/06B01J23/08B01J23/52B01J23/80B01J23/83B01J23/89B01J35/10C07C29/153C07C29/154C07C31/04
CPCB01J21/063B01J23/52B01J23/8926B01J21/066B01J23/08B01J23/06B01J23/80B01J23/83B01J23/002B01J35/1014C07C29/153C07C29/154C07C31/04Y02P20/52
Inventor 段新平陆进麟邹京林叶林敏袁友珠
Owner XIAMEN UNIV
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