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Synthesis gas methanation catalyst and preparation method thereof

A catalyst and gas methane technology, which is applied in the field of synthesis gas methanation catalyst and its preparation to achieve the effects of increasing the concentration of reactants, good dispersion and good carbon-accommodating capacity

Active Publication Date: 2021-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a synthetic gas methanation catalyst and a preparation method thereof. The catalyst uses petroleum coke-based activated carbon as a carrier, which overcomes the problem of high-temperature aggregation of active metals in the activated carbon carrier catalyst, and has active components Good dispersion, high activity, not easy to deposit carbon, etc., especially suitable for methanation of syngas with low hydrogen-to-carbon ratio, without the need for water vapor change process

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  • Synthesis gas methanation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Weigh 24.78g of nickel nitrate hexahydrate, 4.68g of lanthanum nitrate hexahydrate and 6.89g of potassium nitrate in 94mL of deionized water to obtain solution A; weigh 32.74g of citric acid and dissolve in 81mL of deionized water; place solution A in In a water bath at 80°C, under stirring conditions, add the citric acid solution dropwise to solution A. After the dropwise addition, continue to stir until the solution is viscous, and then put it in an oven and dry it at 150°C for 6 hours. The obtained sample Then calcined at 700°C for 6h to obtain a composite oxide.

[0047] Grind 100g of petroleum coke to powder, then mix it evenly with the above-mentioned composite oxide and 200g of potassium hydroxide, place it in a microwave heating furnace with a microwave frequency of 2450MHz, vacuumize it, and raise the temperature to 400°C, keep it constant for 60min, then pass nitrogen gas to normal pressure, continue to raise the temperature to 800°C for 20min under the condit...

Embodiment 2

[0050] Weigh 37.16g of nickel nitrate hexahydrate, 6.23g of lanthanum nitrate hexahydrate and 12.92g of potassium nitrate in 153mL of deionized water to obtain solution A; weigh 73.66g of citric acid and dissolve in 146mL of deionized water; place solution A in In a water bath at 80°C, under stirring conditions, add the citric acid solution dropwise to solution A. After the dropwise addition, continue to stir until the solution is viscous, and then put it in an oven and dry it at 150°C for 6 hours. The obtained sample Then calcined at 700°C for 6h to obtain a composite oxide.

[0051] Grind 100g of petroleum coke to powder, then mix it evenly with the above-mentioned composite oxide and 300g of potassium hydroxide, place it in a microwave heating furnace with a microwave frequency of 2450MHz, vacuumize it, and raise the temperature to 500°C, keep it constant for 40min, then pass nitrogen gas to normal pressure, and continue to heat up to 800°C for 20min under the condition of ...

Embodiment 3

[0054] Weigh 49.55g nickel nitrate hexahydrate, 7.79g lanthanum nitrate hexahydrate and 20.67g potassium nitrate and dissolve in 222mL deionized water to obtain solution A; weigh 130.95g citric acid and dissolve it in 216mL deionized water; place solution A in In a water bath at 80°C, under stirring conditions, add the citric acid solution dropwise to solution A. After the dropwise addition, continue to stir until the solution is viscous, and then put it in an oven and dry it at 150°C for 6 hours. The obtained sample Then calcined at 700°C for 6h to obtain a composite oxide.

[0055] Grind 100g of petroleum coke into powder, then mix it evenly with the above-mentioned composite oxide and 400g of potassium hydroxide, place it in a microwave heating furnace with a microwave frequency of 2450MHz, vacuumize it, and raise the temperature to 400°C, keep it constant for 60min, then pass nitrogen gas to normal pressure, continue to raise the temperature to 900°C for 10min under the co...

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Abstract

The invention provides a synthesis gas methanation catalyst and a preparation method thereof. The catalyst includes an active component, an auxiliary agent and a carrier, the active component is selected from Ni or Co, and the auxiliary agent is selected from one or more rare earth elements. The carrier is petroleum coke-based activated carbon. The preparation method is to firstly prepare the composite oxide, then mix and activate it with petroleum coke and an activator, and then obtain a synthesis gas methanation catalyst after washing and drying. The catalyst has the advantages of good dispersion of active components, high activity, and low carbon deposition, and also solves the problem of high-temperature aggregation of active metals in the active carbon carrier catalyst.

Description

technical field [0001] The invention relates to a synthesis gas methanation catalyst and a preparation method thereof, in particular to a synthesis gas methanation catalyst with carbon as a carrier and a preparation method thereof. Background technique [0002] Methanation refers to CO / CO 2 with H 2 Under certain temperature, pressure and catalyst action, generate CH 4 At present, this reaction is widely used in the removal of trace carbon in the process of ammonia synthesis or hydrogen production, coke oven gas methanation, coal to natural gas and other processes. Methanation is an important catalytic technology, especially in fuel applications, where it can be used to increase the calorific value of gas, allowing the conversion of coke oven gas, coal or biomass to natural gas. In recent years, with the rapid development of my country's coal-based natural gas industry, methanation, one of the core technologies, has received more and more attention. [0003] For the synt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/10C10L3/08C07C1/04C07C9/04
Inventor 张舒冬孙晓丹张庆军宋永一刘继华
Owner CHINA PETROLEUM & CHEM CORP
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