CO2 complete methanation catalyst as well as preparation and application thereof

A technology for complete methanation and catalyst, applied in the field of carbon dioxide methanation catalyst and preparation thereof, can solve the problems of complex active components, high cost, unsuitability for wide-scale promotion, etc., and achieves simple preparation method, energy saving, and use mild conditions

Pending Publication Date: 2020-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carriers or active components disclosed in the above patents are relatively complex and costly, and are not suitable for large-scale promotion.

Method used

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  • CO2 complete methanation catalyst as well as preparation and application thereof
  • CO2 complete methanation catalyst as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 9.7gNi(NO 3 ) 2 ·6H 2 O, 0.97gLa(NO 3 ) 3 ·6H 2 O, 52.2gAl(NO 3 ) 3 9H 2 O was dissolved in 100mL deionized water and stirred to dissolve into a salt solution, and another 50g (NH4 ) 2 CO 3 Solid solution 150mL deionized water is made into alkaline solution. At room temperature, the two solutions prepared above are subjected to co-precipitation reaction by co-current co-precipitation method. During the precipitation process, the pH value of the mother solution is controlled to be 8. After the precipitation is completed, continue to stir and age 3h, then the precipitated product was washed with deionized water, and then dried at 120°C for 10h, and finally the dried precipitated product was calcined in air at 600°C for 4h to obtain catalyst sample 1 # .

Embodiment 2

[0032] Weigh 9.7gNi(NO 3 ) 2 ·6H 2 O, 1.01g Ce(NO 3 ) 3 ·6H 2 O, 52.2gAl(NO 3 ) 3 9H 2 O was dissolved in 100mL deionized water and stirred to dissolve into a salt solution, and another 50g (NH 4 ) 2 CO 3 Solid solution 150mL deionized water to make alkaline solution, at 60°C, adopt co-current co-precipitation method, carry out co-precipitation reaction of the above two prepared solutions, control the pH value of the mother solution to 8 during the precipitation process, and continue to stir after the precipitation is completed After aging for 3 hours, the precipitated product was washed with deionized water, then dried at 120°C for 10 hours, and finally the dried precipitated product was calcined in air at 600°C for 4 hours to obtain catalyst sample 2 # .

Embodiment 3

[0034] Weigh 7.0gNi(NO 3 ) 2 ·6H 2 O, 0.49gLa(NO 3 ) 3 ·6H 2 O, 1.27gMg(NO 3 ) 2 ·6H 2 O, 57.4gAl(NO 3 ) 3 9H 2 O was dissolved in 100mL deionized water and stirred to dissolve into a salt solution, and another 50g (NH 4 ) 2 CO 3 Solid solution 150mL deionized water is made into alkaline solution. At room temperature, the two solutions prepared above are subjected to co-precipitation reaction by co-current co-precipitation method. During the precipitation process, the pH value of the mother solution is controlled to be 8. After the precipitation is completed, continue to stir and age 3h, then the precipitated product was washed with deionized water, and then dried at 120°C for 10h, and finally the dried precipitated product was roasted in air at 600°C for 4h to obtain catalyst sample 3 # .

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Abstract

The invention provides a CO2 complete methanation catalyst, an active component of the catalyst is NiO; an auxiliary agent is La2O3 and/or CeO2; or the auxiliary agent is MgO and La2O3 and/or CeO2, orthe auxiliary agent is Fe2O3 and La2O3 and/or CeO2, a carrier is Al2O3, and the catalyst comprises the following components in percentage by mass: 10%-20% of the NiO, 1%-5% of the La2O3 and/or CeO2,1%-5% of the MgO, 1%-5% of the Fe2O3 and/or CeO2 and the balance of the Al2O3. The catalyst is prepared by adopting a coprecipitation method and is applied through drying, roasting and forming. According to the catalyst, under the reaction conditions that the pressure is 2.5-4.5 MPa, the temperature is 300-400 DEG C, the air speed is 15000-50000 ml.g <-1 >. H <-1 >, and H2/CO2 is equal to 4-4.5, the CO2 conversion rate and CH4 selectivity can be close to 100%. The catalyst is simple to prepare, shows excellent performance at high space velocity, and is suitable for industrial production and application.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide methanation, in particular to a catalyst for carbon dioxide methanation and its preparation method and application. Background technique [0002] The global climate problem caused by carbon dioxide as the main component of greenhouse gas has seriously affected the survival of human beings. The requirement for carbon dioxide emission reduction and the need for sustainable energy development are, in the final analysis, how to realize the new carbon cycle. Therefore, the conversion and utilization of carbon dioxide as a carbon resource has become the goal of scientific and technological workers for many years. Methane is the main component of natural gas, which has been widely used as a clean energy. At present, the most common use of natural gas is to utilize the huge heat energy generated by the combustion of methane, and the carbon dioxide generated during the combustion process is inevita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C07C1/12C07C9/04
CPCB01J23/002B01J23/755C07C1/12B01J2523/00C07C2523/755C07C9/04B01J2523/31B01J2523/3706B01J2523/847B01J2523/3712B01J2523/22B01J2523/842
Inventor 方传艳葛庆杰孙剑
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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