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CO & CO2 co-methanation catalyst and preparation method and application thereof

The technology of a methanation catalyst and auxiliary agent is applied in the field of CO&CO2 co-methanation catalyst and its preparation, which can solve the problems that the reaction conditions need to be further optimized, the catalyst preparation process is complicated, and the catalyst preparation cost is high, and the catalyst has good repeatability and good industrial performance. Application prospects, the effect of easy control of reaction conditions

Active Publication Date: 2020-04-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN101773833A discloses a carbon dioxide methanation catalyst with airgel oxide as a carrier and additives added and its preparation method. The carrier selected by the catalyst is relatively novel, but its industrial application prospect is not good
CN102755894A discloses a kind of TiO 2 -ZrO 2 A nickel-based catalyst based on a composite oxide was used to prepare a titanium-zirconium composite carrier by the co-precipitation method of metatitanic acid and zirconium hydroxide, and in the presence of triton and polyethylene glycol, the rare earth- Basic nickel carbonate, the catalyst is prepared by mixing the two, which has the advantages of large specific surface area and large pore volume, and the heat resistance of the catalyst material is enhanced by adding magnesium oxide microporous insulation materials, but the catalyst preparation process is relatively complicated
CN102259003A discloses a kind of TiO 2 -ZrO 2 -SiO 2 Nickel-based catalysts supported by composite oxides, and precious metals such as Re are added as additives, resulting in high preparation costs for the catalysts
CN106311242 discloses a nickel-based catalyst with different composite metal oxides as the carrier. The catalyst has various types, simple process and industrial prospects, but its high temperature and high pressure reaction conditions need to be further optimized

Method used

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  • CO & CO2 co-methanation catalyst and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Put 26.55g of lanthanum nitrate, 50g of pseudoboehmite and 10g of plant glue into the kneader, add 250mL of deionized water, add dilute nitric acid to adjust the pH to 3-4, fully knead to obtain aluminum sol, and then add 400g of TiO 2 powder and 278g Zr(OH) 4 The powder is mixed and kneaded into a plastic mass, and then extruded with an extruder to form a strip, left at room temperature for 6-20 hours, then dried at 80-120°C for 4-6h and roasted at 500°C for 4-8h to obtain the carrier;

[0030] (2) 5.9g of nickel nitrate, 0.823g of manganese nitrate and 5g of deionized water were prepared into a solution, and 10g of the above-mentioned carrier was impregnated in it, the number of immersions was 1-3 times, and the total time of immersion was 4-10h. Stand for 4-12h and dry at 110°C for 4-10h;

[0031] (3) Place the material obtained in step (2) in a muffle furnace, raise the temperature to 550°C at a heating rate of 2-5°C / min, and roast for 4-8h to obtain the CO&CO ...

Embodiment 2

[0034] (1) with embodiment 1;

[0035] (2) 5.9g of nickel nitrate, 1.646g of manganese nitrate and 5g of deionized water were prepared into a solution, and 10g of the above-mentioned carrier was impregnated in it. The number of immersions was 1-3 times, and the total time of immersion was 4-10h. Stand for 4-12h and dry at 110°C for 4-10h;

[0036](3) Place the material obtained in step (2) in a muffle furnace, raise the temperature to 550°C at a heating rate of 2-5°C / min, and roast for 4-8h to obtain the CO&CO 2 Co-methanation catalyst.

[0037] The CO&CO that this embodiment makes 2 Co-methanation catalyst for fixed bed CO&CO 2 Co-methanation reaction, the composition of the reaction gas contains CO, CO 2 and H 2 , H 2 The volume ratio of H and CO is 5:1, H 2 and CO 2 The volume ratio is 10:1, the space velocity of the reaction gas is 5000 / h, the reaction temperature is 450°C, the reaction time is 2h, and the reaction pressure is 1MPa.

Embodiment 3

[0039] (1) Put 26.55g of lanthanum nitrate, 63g of cerium nitrate, 50g of pseudoboehmite and 10g of plant glue into a kneader, add 250mL of deionized water, add dilute nitric acid to adjust the pH to 3-4, fully knead to obtain aluminum sol, and then Add 400g TiO 2 powder and 278gZr(OH) 4 The powder is mixed and kneaded into a plastic mass, and then extruded with an extruder to form a strip, left at room temperature for 6-20 hours, then dried at 80-120°C for 4-6h and roasted at 500°C for 4-8h to obtain the carrier;

[0040] (2) 5.9g of nickel nitrate, 1.646g of manganese nitrate and 5g of deionized water were prepared into a solution, and 10g of the above-mentioned carrier was impregnated in it. The number of immersions was 1-3 times, and the total time of immersion was 4-10h. Stand for 4-12h and dry at 110°C for 4-10h;

[0041] (3) Place the material obtained in step (2) in a muffle furnace, raise the temperature to 550°C at a heating rate of 2-5°C / min, and roast for 4-8h to...

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Abstract

The invention discloses a CO & CO2 co-methanation catalyst and a preparation method and application thereof. The CO & CO2 co-methanation catalyst comprises an active component, an auxiliary agent anda carrier. Compared with a traditional methanation catalyst with Al2O3 as a carrier, the CO & CO2 co-methanation catalyst has the advantages that the carrier is high in activity, good in low-temperature activity, high in toxicity resistance and the like. The CO & CO2 co-methanation catalyst is good in low-temperature activity, simple and easy to operate in preparation method, easy to control reaction conditions, cheap and easily available in raw materials and good in catalyst repeatability and has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of methanation catalysts, in particular to a CO&CO 2 Co-methanation catalyst and its preparation method and application. Background technique [0002] As a clean energy, the usage of natural gas is increasing year by year, but the reserves of natural gas in my country are seriously insufficient. Coal reserves are relatively considerable, and it is still the main form of energy in a short period of time. However, more than 80% of coal is burned directly every year, which makes the utilization rate of coal resources low and causes a huge waste of resources. If we can make rational use of superior resources and vigorously develop synthetic natural gas technology, on the one hand, we can effectively improve the energy utilization rate, meet the market consumption demand of natural gas, alleviate the imbalance between supply and demand of natural gas resources, and slow down the price rise caused by natural gas ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J23/889C07C1/04C07C1/12C07C9/04
CPCB01J23/8892B01J27/24B01J23/10C07C1/0435C07C1/0445C07C1/12C07C2523/889C07C9/04
Inventor 连奕新吴洪键霍秀春赖伟坤王伦韬余姮
Owner XIAMEN UNIV
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