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Catalyst for methane synthesis through carbon dioxide hydrogenation and preparation method thereof

A technology for synthesizing methane and carbon dioxide, which is applied in the direction of producing hydrocarbons from carbon oxides, can solve the problem of limited effective load, and achieve the effects of improving the electronic state, no pollution to the environment, and simple operation

Inactive Publication Date: 2014-06-11
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because when the catalyst is prepared by the impregnation method, if the active component is too high, it is easy to dissociate on the surface of the carrier, and sintering occurs during the calcination process, resulting in limited effective loading.
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Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The catalyst used in the hydrogenation of carbon dioxide to synthesize methane is composite oxide Eu 2 o 3 -Co 3 o 4 -ZrO 2 , where the molar ratio of Co to Zr is 4:6, and the amount of rare earth element Eu added is 1% of the total molar amount of Co and Zr.

[0029] The preparation method of the catalyst used for the synthesis of methane by the hydrogenation of a kind of carbon dioxide specifically comprises the following steps:

[0030] (1), weigh 3.17 g Co(NO 3 ) 2 ·6H 2 O, 6.95 g Zr(NO 3 ) 4 ·5H 2 O, 5.23 g C 6 h 8 o 7 ·H 2 O, and then add deionized water respectively to obtain Co(NO 3 ) 2 Aqueous solution, concentration of 0.81mol / L Zr(NO 3 ) 4 Aqueous solution and C with a concentration of 1.24mol / L 6 h 8 o 7 aqueous solution;

[0031] Weigh 0.048 g Eu 2 o 3 , add 1.0ml concentration of 69% concentrated nitric acid to prepare Eu(NO 3 ) 3 aqueous solution;

[0032] (2), take the Co(NO) obtained in step (1) 3 ) 2 Aqueous solution 20ml, Z...

Embodiment 2

[0036] A kind of catalyst that carbon dioxide hydrogenation is used for synthesizing methane, described catalyst is composite oxide Eu 2 o 3 -Co 3 o4 -ZrO 2 , where the molar ratio of Co to Zr is 4:6, and the amount of rare earth element Eu is 3% of the total molar amount of Co and Zr.

[0037] The preparation method of the above-mentioned catalyst used in the hydrogenation of carbon dioxide to synthesize methane is only to take 3.0ml of the europium nitrate aqueous solution described in step (2), that is, to control the molar ratio of Co and Zr in the mixed solution to be 4:6, and the amount of Eu 3% of the total molar amount of Co and Zr, C 6 h 8 o 7 ·H 2 The amount of O is 92.5% of the total molar amount of Co and Zr; the others are the same as in Example 1, and the catalyst B used for the hydrogenation of carbon dioxide to synthesize methane is finally obtained.

Embodiment 3

[0039] A kind of catalyst that carbon dioxide hydrogenation is used for synthesizing methane, described catalyst is composite oxide Eu 2 o 3 -Co 3 o 4 -ZrO 2 , wherein the molar ratio of Co to Zr is 4:6, and the amount of rare earth element Eu is 5% of the total molar amount of Co and Zr.

[0040] The preparation method of the above-mentioned catalyst used in the hydrogenation of carbon dioxide to synthesize methane is only 5.0ml of the europium nitrate aqueous solution described in step (2), that is, the molar ratio of Co and Zr in the mixed solution is controlled to be 4:6, The amount of Eu is 5% of the total molar amount of Co and Zr, C 6 h 8 o 7 ·H 2 The amount of O is 92.5% of the total molar amount of Co and Zr; the others are the same as in Example 1, and the catalyst C used for the hydrogenation of carbon dioxide to synthesize methane is finally obtained.

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Abstract

The invention discloses a catalyst for methane synthesis through carbon dioxide hydrogenation and a preparation method of the catalyst for methane synthesis through carbon dioxide hydrogenation. The catalyst for methane synthesis through carbon dioxide hydrogenation is a composite oxide Eu2O3-Co3O4-ZrO2, wherein the molar ratio of Co and Zr is 4:6, and the quantity of rare earth element Eu is 1-10% of the molar total quantity of Co and Zr. The preparation method comprises the following steps of: adopting citric acid as fuel, and preparing the composite oxide Eu2O3-Co3O4-ZrO2 through a combustion method. The obtained composite oxide Eu2O3-Co3O4-ZrO2 is used for catalyzing carbon dioxide hydrogenation to synthesize methane and shows a good catalytic performance. The preparation method has the characteristics that the process is simple and quick, the environmental-friendly chemical concept can be conformed, and the industrial production can be easily realized.

Description

technical field [0001] The invention relates to a catalyst used for carbon dioxide hydrogenation to synthesize methane and a preparation method thereof. More specifically, it relates to a catalyst for the hydrogenation of methane from carbon dioxide prepared by citric acid combustion method, that is, the composite oxide Eu 2 o 3 -Co 3 o 4 -ZrO 2 , the catalyst has excellent effect in the reaction of carbon dioxide hydrogenation to methane. Background technique [0002] Due to the impact of human activities, the content of carbon dioxide in the atmosphere has risen sharply in recent years, and the greenhouse effect has become increasingly significant, which has led to a series of problems such as global warming, melting glaciers, and rising sea levels. While controlling carbon dioxide emissions, it is of great significance to realize the effective use of carbon dioxide. [0003] The hydrogenation of carbon dioxide to methane is an important way to utilize carbon dioxide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C07C9/04C07C1/12
Inventor 郭晓明黄夏阳毛东森卢冠忠王嵩
Owner SHANGHAI INST OF TECH
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