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Perovskite supported nickel base methanation catalyst and preparation method thereof

A methanation catalyst and perovskite technology are applied in the field of perovskite-supported nickel-based synthesis gas complete methanation catalysts and their preparation fields, which can solve the problem of narrow catalyst activity temperature range, catalyst deactivation by carbon deposition, and decreased catalytic efficiency, etc. problem, to achieve the effect of maintaining high activity, good stability, and avoiding the formation of carbonyl groups

Active Publication Date: 2012-06-27
JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The methanation catalyst introduced in the above-mentioned patent documents has the following disadvantages: on the one hand, the carbon deposition and deactivation phenomenon of the catalyst is serious, and the service life is short; in addition, the active temperature range of the catalyst is relatively narrow. Catalyst sintering, catalytic efficiency decreased
Due to the advantages of good thermal stability, high catalytic activity and low cost, perovskite will have a good application prospect in the methanation reaction of coal pyrolysis gas, but there have been no relevant reports so far.

Method used

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  • Perovskite supported nickel base methanation catalyst and preparation method thereof
  • Perovskite supported nickel base methanation catalyst and preparation method thereof
  • Perovskite supported nickel base methanation catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0054] Commercial CaTiO 3 (specific surface2 / g) placed in a box furnace at 400 ° C for 4 hours, cooled for later use. Weigh 1.8g Ni(AC) 2 4H 2 O, 0.27g La(AC) 3 ·5H 2 O is dissolved in 30g deionized water to form a metal salt solution, and Ni in the solution 2+ The concentration is 0.24mol / L, La 3+ The concentration is 0.022mol / L. Then weigh 10g of calcined CaTiO 3 Add it to the above metal salt solution, stir at 20°C, raise the temperature to 80°C after 2 hours, evaporate to dryness with stirring, put it in an oven and dry it at 120°C for 6 hours, then put it in a box furnace and roast at 400°C 2h, after cooling for later use.

Embodiment 2

[0056] Commercial CaTiO 3 (specific surface2 / g) placed in a box furnace at 400 ° C for 4 hours, cooled for later use. Weigh 4.4g Ni(NO 3 ) 2 ·6H 2 O, 0.61g La(NO 3 ) 3 ·6H 2 O was dissolved in 60g deionized water to form a metal salt solution, in which Ni 2+ The concentration is 0.26mol / L, La 3+ The concentration is 0.024mol / L. Then weigh 10g of calcined CaTiO 3 Add it to the above metal salt solution, stir at 30°C, raise the temperature to 80°C after 8 hours, evaporate to dryness with stirring, put it in an oven and dry it at 100°C for 12 hours, then put it in a box furnace and roast at 400°C for 4 hours , and set aside after cooling.

Embodiment 3

[0058] Commercial CaTiO 3 (specific surface2 / g) placed in a box furnace at 400 ° C for 4 hours, cooled for later use. Weigh 4.4g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 60g deionized water to form a metal salt solution, in which Ni 2+ The concentration is 0.26mol / L. Then weigh 10g of calcined CaTiO 3 Add it to the above metal salt solution, stir at 30°C, raise the temperature to 80°C after 8 hours, evaporate the water with stirring, put it in an oven and dry it at 100°C for 12 hours, then put it in a box furnace and roast at 400°C 4 hours, after cooling for later use.

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Abstract

The invention relates to the field of methanation catalysis, particularly a syngas complete methanation catalyst and a preparation method thereof. The catalyst is prepared by using perovskite-type substances as a carrier, NiO as an active component, and rare-earth oxides as an auxiliary agent, and loading the active component and the auxiliary agent on the carrier by using an immersion method. The catalyst comprises 1-70 wt% of NiO, 0-15 wt% of rare-earth oxide, and the balance of perovskite. The catalyst disclosed herein has the advantages of high catalytic activity, strong anti-carbon formation and anti-sintering property, low nickel content, and low cost, and is especially suitable for high-concentration CO methanation reaction systems at high pressures.

Description

technical field [0001] The invention relates to the field of methanation catalysis, in particular, the invention relates to a perovskite-supported nickel-based catalyst for complete methanation of synthesis gas and a preparation method thereof. Background technique [0002] my country is a country rich in coal, poor in oil, and low in gas. For a long time, coal has occupied a major position in my country's primary energy consumption structure. However, about 80% of the coal consumption is converted directly through combustion, which results in a low utilization rate of heat energy and discharges a large amount of pollutants at the same time. Therefore, it is of great significance to develop high-efficiency, low-carbon and clean coal resource utilization technologies. The effective utilization rate of coal-to-methane thermal energy is high, which is not only conducive to the efficient and clean comprehensive utilization of coal, but also provides a practical way to supplemen...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/755B01J23/835B01J23/889C07C9/04C07C1/04
Inventor 苏发兵古芳娜贾春苗高加俭王莹利许光文翟世辉
Owner JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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