Low-temperature carbon dioxide methanation catalyst and preparation method thereof

A methanation catalyst and carbon dioxide technology, applied in the field of natural gas, can solve problems such as poor stability, poor anti-coking performance, and low low-temperature activity, and achieve the effects of short preparation process, easy repeatability, and high specific surface area

Pending Publication Date: 2021-02-23
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is: in order to overcome the defects of existing methanation catalysts such as low low-temperature activity, poor stability, and poor carbon deposition resistance

Method used

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  • Low-temperature carbon dioxide methanation catalyst and preparation method thereof
  • Low-temperature carbon dioxide methanation catalyst and preparation method thereof
  • Low-temperature carbon dioxide methanation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation method of low-temperature carbon dioxide methanation catalyst of the present invention, the detailed steps of this preparation method are as follows:

[0048] a. Add 7.50g of Al(NO 3 ) 3 9H 2 O and 0.56gNi(NO 3 ) 2 ·6H 2 O (both chemically pure) was dissolved in 100mL deionized water, and stirred for 1h under a magnetic stirrer to obtain a mixed solution;

[0049] b. Under the condition of 65℃ and constant stirring, add 1.0mol / L Na 2 CO 3 Solution is added dropwise in step a gained mixed solution (Na 2 CO 3 The solution is obtained by dissolving anhydrous sodium carbonate in deionized water), and the dropwise addition is completed when the pH value of the mixed solution is 9; then continue stirring at 65° C. for 2 hours to obtain a solid-liquid mixture;

[0050] c. Aging the solid-liquid mixture obtained in step b for 24 hours, washing with distilled water after aging until the pH value of the solution is 7, and obtaining a solid sample;

[005...

Embodiment 2

[0054] The preparation method of low-temperature carbon dioxide methanation catalyst of the present invention, the detailed steps of this preparation method are as follows:

[0055] a. Add 6.26g Al(NO 3 ) 3 9H 2 O, 1.42g Zr(NO 3 ) 4 ·5H 2 O and 0.69g Ni(NO 3 ) 2 ·6H 2 O (both chemically pure) was dissolved in 100mL deionized water, and stirred for 1h under a magnetic stirrer to obtain a mixed solution;

[0056] b. Under the condition of 60°C and constant stirring, use a peristaltic pump to add 0.8 mol / L Na to the precipitant 2 CO 3 Solution is added dropwise in step a gained mixed solution (Na 2 CO 3 The solution is obtained by dissolving anhydrous sodium carbonate in deionized water), and the dropwise addition is completed when the pH value of the mixed solution is 10; then the stirring is continued at 60° C. for 2 hours to obtain a solid-liquid mixture;

[0057] c. Aging the solid-liquid mixture obtained in step b for 24 hours, washing with distilled water after ...

Embodiment 3

[0061] The preparation method of low-temperature carbon dioxide methanation catalyst of the present invention, the detailed steps of this preparation method are as follows:

[0062] a. Add 5.36g Al(NO 3 ) 3 9H 2 O, 2.44g Zr(NO 3 ) 4 ·5H 2 O and 0.78g Ni(NO 3 ) 2 ·6H 2 O (both chemically pure) was dissolved in 100mL deionized water, and stirred for 1h under a magnetic stirrer to obtain a mixed solution;

[0063] b. Under the condition of 70°C and constant stirring, use a peristaltic pump to add 0.5 mol / L Na to the precipitant 2 CO 3 Solution is added dropwise in step a gained mixed solution (Na 2 CO 3 The solution is obtained by dissolving anhydrous sodium carbonate in deionized water), and the dropwise addition is completed when the pH value of the mixed solution is 10; then the stirring is continued at 70° C. for 2 hours to obtain a solid-liquid mixture;

[0064] c. Aging the solid-liquid mixture obtained in step b for 24 hours, washing with distilled water after ...

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Abstract

The invention discloses a low-temperature carbon dioxide methanation catalyst and a preparation method thereof. The catalyst comprises an active component and a carrier, wherein the active component is Ni, and the carrier is alumina, zirconia or a composite carrier of alumina and zirconia, wherein the mass percentage of the active component Ni is 5-25wt%, and the balance is the carrier. The methodcomprises: dissolving aluminum nitrate, zirconium nitrate or a compound of the aluminum nitrate and the zirconium nitrate and nickel nitrate in deionized water to obtain a mixed solution, dropwise adding a precipitant into the obtained mixed solution, stirring to obtain a solid-liquid mixture,aging the obtained solid-liquid mixture, washing the aged solid-liquid mixture with distilled water untilthe aged solid-liquid mixture is neutral to obtain a solid sample, and finally, sequentially drying, roasting and treating the solid sample to obtain the Ni-based catalyst, namely the low-temperaturecarbon dioxide methanation catalyst. The methanation catalyst prepared by the invention has an effect obviously superior to that of the traditional Ni / Al2O3 catalyst, and is simple in preparation method, stable in performance and long in service life, excellent development prospect.

Description

[0001] 1. Technical field: [0002] The invention relates to the technical field of natural gas, in particular to a low-temperature carbon dioxide methanation catalyst and a preparation method thereof. [0003] 2. Background technology: [0004] "Coal-rich, oil-poor, and gas-poor" is a prominent feature of my country's energy resources, and it is of great significance to develop clean and efficient utilization technologies for coal. Using coal as raw material to produce natural gas through synthesis gas catalysis can not only alleviate the shortage of natural gas in my country, realize energy saving, emission reduction and diversification of natural gas supply, but also realize efficient and clean utilization of coal resources, which is in line with the national clean utilization of coal and resources Strategic Security Policy. [0005] Methanation technology refers to CO / CO under the action of catalyst 2 with H 2 A technology in which a reaction occurs and the main product i...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/78B01J35/10C07C1/12C07C9/04
CPCB01J23/755B01J23/78C07C1/12B01J35/61C07C9/04
Inventor 马园园廉红蕾孙绍晖高健牛宏伟韩一帆
Owner ZHENGZHOU UNIV
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