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Carbon dioxide methanation catalyst and application thereof

A methanation catalyst, carbon dioxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, carbon compound catalyst, catalyst, etc., can solve the problems of harsh reaction conditions, low conversion rate, etc., to improve conversion rate, reaction Good speed, promoting the effect of activation

Inactive Publication Date: 2017-12-22
GUANGXI XIUMEI ZHUANGXIANG ENERGY ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the invention of the present invention is: to above-mentioned problem, provide a kind of carbon dioxide methanation catalyst and application thereof, develop a kind of cobalt base catalyst for carbon dioxide methanation, to solve CO 2 Conversion rate is not high and problems such as harsh reaction conditions, and, the catalyst used in the present invention can enhance inert molecule CO to a certain extent 2 activation ability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) A 5%Co / 0.1%Y-TiO 2 The preparation method of catalyst, comprises the steps:

[0027] 0.1% Y-TiO 2 Preparation: Measure 20mL tetrabutyl titanate and 20mL absolute ethanol to form a mixed solution A, then measure 10mL absolute ethanol, 10mL glacial acetic acid and 5mL water to mix, add 0.0048g yttrium nitrate hexahydrate, stir Dissolve and configure as mixed solution B. Slowly drop the mixed solution B into the mixed solution A at a rotation speed of 400r / min, continue to stir for 30min after the dripping is completed, let stand and age for 3h to form a gel, then dry the gel at 80°C for 10h, and grind it to 100 Under the mesh, then roasted in a muffle furnace at 300 ° C for 3 hours to obtain 0.5% Y-TiO 2 carrier.

[0028] 5%Co / 0.1%Y-TiO 2 Preparation: Weigh 0.46g cobalt nitrate hexahydrate and 2.20g 0.1% Y-TiO 2 The carrier was dissolved in 100 mL deionized water to prepare a mixed suspension, and stirred for 1 h. Weigh 0.94g of ammonium carbonate and dissolve ...

Embodiment 2

[0032] (1) A 15%Co / 2%Y-TiO 2 The preparation method of catalyst, comprises the steps:

[0033] 3% Y-TiO 2 Preparation: Measure 20mL of tetrabutyl titanate and 24mL of absolute ethanol to form a mixed solution A, then measure 5mL of absolute ethanol, 10mL of glacial acetic acid and 5mL of water for mixing, add 0.096g of yttrium nitrate hexahydrate, stir Dissolve and configure as mixed solution B. Slowly drop the mixed solution B into the mixed solution A at a rotation speed of 550r / min, continue to stir for 1h after the dripping, leave to age for 5h to form a gel, then dry the gel at 100°C for 12h, grind to 100 2% Y-TiO is obtained by roasting at 500°C for 5 hours in a muffle furnace.2 carrier.

[0034] 15%Co / 2%Y-TiO 2 Preparation: Weigh 1.52g cobalt nitrate hexahydrate and 2.15g 0.1% Y-TiO 2 The carrier was dissolved in 100mL deionized water to prepare a mixed suspension, and stirred for 2h. Weigh 1.88g of ammonium carbonate and dissolve it in 20mL of deionized water to ...

Embodiment 3

[0037] The preparation method of the catalyst in this example is basically the same as in Example 2, except that 0.096g of yttrium nitrate hexahydrate is replaced by 0.096g of zirconium nitrate pentahydrate to finally obtain 15%Co / 2%Zr-TiO 2 Catalyst; According to the activity evaluation method among the embodiment 1 to 15%Co / 2%Zr-TiO 2 Catalyst for CO 2 Activity evaluation for methanation, at 350°C, CO 2 The conversion rate reached a maximum of 82.5%, and the methane selectivity was 99.2%.

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Abstract

The invention discloses a carbon dioxide methanation catalyst and an application thereof and belongs to the field of heterogeneous catalysis. The catalyst is prepared from active component cobalt and a titanium dioxide carrier modified through an aid, wherein the content of the active component cobalt is 5%-40%, the content of the aid is 0.1%-15%. The catalyst has better low-temperature matchability in a carbon dioxide methanation reaction, and the conversion rate of carbon dioxide is higher and the methane selectivity is close to 100% at the reaction temperature of 140-500 DEG C. The synthesis process of the catalyst is simple and easy to operate, carbon dioxide molecules can be effectively activated, the reaction conditions are mild, and the reaction speed is good. The catalyst can be efficiently used for the field of emission reduction of carbon dioxide, meets the green chemistry idea and is easy to industrialize.

Description

【Technical field】 [0001] The invention relates to the field of heterogeneous catalysis, in particular to a carbon dioxide methanation catalyst and its application. 【Background technique】 [0002] As we all know, due to the development of industry and frequent human activities, the emission of carbon dioxide in the atmosphere is increasing day by day, and the resulting global warming has threatened the living environment of human beings. Therefore, the control and conversion of carbon dioxide emission is the current research the key of. The hydrogenation of carbon dioxide into methane is considered to be an efficient method of carbon dioxide conversion, which can not only alleviate the emission of carbon dioxide, but also obtain methane products. Methane is the main component of natural gas, and the synthesis of methane through hydrogenation of carbon dioxide can alleviate the crisis of energy depletion in the world to a certain extent. Therefore, the development of efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/75B01J35/10C07C1/12C07C9/04
CPCC07C1/12B01J23/75B01J23/83C07C2523/83C07C2523/75B01J35/61C07C9/04
Inventor 谢英健
Owner GUANGXI XIUMEI ZHUANGXIANG ENERGY ENVIRONMENTAL PROTECTION CO LTD
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