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CO2 low-temperature methanation catalyst, preparation and application thereof

A low-temperature methanation and catalyst technology, used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, and hydrocarbon production from carbon oxides, etc., to achieve high low-temperature activity, good catalyst stability, and preparation. simple method effect

Active Publication Date: 2019-03-29
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CO 2 Methanation catalysts mainly need to solve the problems of high activity and high selectivity under low temperature conditions, as well as the stability of the catalyst

Method used

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  • CO2 low-temperature methanation catalyst, preparation and application thereof
  • CO2 low-temperature methanation catalyst, preparation and application thereof
  • CO2 low-temperature methanation catalyst, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 43.27g of aluminum nitrate nonahydrate and dissolve it in 1000mL of deionized water, heat it to 50-70°C in a constant temperature reactor, add 82.35g of Al 2 o 3 and 11.76g of CNTs powder, stirred and slowly added dropwise 0.05g / mL potassium carbonate solution for precipitation reaction, the pH value at the end point was controlled to be 7.0-8.5, and the reaction time was about 30-40min. The precipitate was aged for 2 hours, washed, filtered, dried at 110°C for 8 hours, and then baked in a muffle furnace at 400°C for 4 hours to obtain carrier powder.

[0028] Crush the carrier powder through a 200-mesh sieve, add water and mix evenly, press it into a column shape with a ring press machine at Φ6×6mm, and dry at 110°C to obtain Al 2 o 3 - CNTs carrier.

[0029] Add the above carrier to excess 1.68g / mL Ni(NO 3 ) 2 ·6H 2 O and 0.18g / mLLa(NO 3 ) 3 ·6H 2 Immerse in the mixed solution of O for 0.5h, take out the solid after impregnation, dry in an oven at 100°C ...

Embodiment 2

[0032] Weigh 43.27g of aluminum nitrate nonahydrate, dissolve it in 1000mL of deionized water, heat it to 50-70°C in a constant temperature reactor, and add 76.47g of Al 2 o 3 and 17.65g of CNTs powder, stirred and slowly added dropwise 0.05g / mL potassium carbonate solution for precipitation reaction, the pH value at the end point was controlled to be 7.0-8.5, and the reaction time was about 30-40min. The precipitate was aged for 2 hours, washed, filtered, dried at 100° C. for 8 hours, and then placed in a muffle furnace for 350° C. and calcined for 4 hours to obtain carrier powder.

[0033] Crush the carrier powder through a 200-mesh sieve, add water and mix evenly, press it into a column shape with a ring press machine at Φ6×6mm, and dry at 110°C to obtain Al 2 o 3 - CNTs carrier.

[0034] Add the above carrier to excess 1.68g / mL Ni(NO 3 ) 2 ·6H 2 O and 0.18g / mLLa(NO 3 ) 3 ·6H 2 Immerse in the mixed solution of O for 0.5h, take out the solid after impregnation, dry ...

Embodiment 3

[0037] Weigh 43.27g of aluminum nitrate nonahydrate and dissolve it in 1000mL of deionized water, heat it to 50-70°C in a constant temperature reactor, add 82.35g of Al 2 o 3and 11.76g of CNTs powder, stirred and slowly added dropwise 0.05g / mL potassium carbonate solution for precipitation reaction, the pH value at the end point was controlled to be 7.0-8.5, and the reaction time was about 30-40min. The precipitate was aged for 2 hours, washed, filtered, dried at 110°C for 8 hours, and then baked in a muffle furnace at 400°C for 4 hours to obtain carrier powder.

[0038] Crush the carrier powder through a 200-mesh sieve, add water and mix evenly, press it into a column shape with a ring press machine at Φ6×6mm, and dry at 110°C to obtain Al 2 o 3 - CNTs carrier.

[0039] Add the above carrier to excess 1.68g / mL Ni(NO 3 ) 2 ·6H 2 O and 0.17g / mLCe(NO 3 ) 4 ˙6H 2 Immerse in a mixed solution of O for 0.5h, take out the solid after immersion, dry in an oven at 110°C for 8h...

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Abstract

The invention provides a CO2 low-temperature methanation catalyst, which belongs to the technical field of the methanation catalyst. The catalyst comprises a carrier, an active component and an auxiliary agent, the carrier comprises Al2O3 and carbon nanotubes, the active component is NiO, and the auxiliary agent is selected from one or two of La2O3 and CeO2; by taking total mass percentage of thecatalyst, the content of the Al2O3 is 55 to 85 wt%, the content of the CNTs is 1 to 20 wt%, the content of the active component NiO is 10 to 25 wt%, and the content of the auxiliary agent is 0 to 5 wt%. The invention also provides a preparation method and application of the catalyst. The catalyst of the invention uses Al2O3-CNTs as a composite carrier to load metal nickel, which can significantlyimprove the low temperature stability of the catalyst. The catalyst of the invention has high strength and excellent CO2 low-temperature methanation activity, and the catalyst of the invention after high temperature operation has high low-temperature activity and good catalyst stability. The catalyst preparation method is simple, and has industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of methanation catalysts, specifically a CO 2 Low temperature methanation catalyst, preparation and application. Background technique [0002] CO 2 Is the main greenhouse gas, but also an important basic carbon source, to achieve CO 2 The utilization of resources has great significance to the field of environment and energy. CO 2 Hydromethanation to produce CH 4 On the one hand, CO can be reduced 2 On the one hand, it is an important supplement to high-quality clean energy—natural gas. CO, CO 2 、H 2 The production of synthetic natural gas from the mixed gas source has been rapidly developed in China, among which CO2 at low temperature must be realized 2 For complete methanation, highly active catalysts are the key. [0003] CO 2 Methanation catalysts mainly need to solve the problems of high activity and high selectivity under low temperature conditions, as well as the stability of the catalyst. ...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J35/10C07C1/12C07C9/04
CPCC07C1/12B01J23/745B01J35/61C07C9/04
Inventor 凡美婷刘玉成冯雅晨曾凌云谭青胡方
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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