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Synthesis gas methanation catalyst and its preparation method

A catalyst, gas methane technology, applied in the field of synthesis gas methanation catalyst and its preparation, can solve the problems of deactivation, increase of process cost, etc., and achieve the effects of long life, good dispersion of active metals, and increase of reactant concentration

Active Publication Date: 2022-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the reaction of syngas methanation to natural gas, the commonly used industrial methanation catalysts are supported nickel-based catalysts. However, nickel-based catalysts are very sensitive to sulfur and are easily deactivated by sulfur poisoning.
When using nickel-based catalysts, it is required to strictly control the sulfur content in the syngas feedstock, which greatly increases the process cost

Method used

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  • Synthesis gas methanation catalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]Grind 100g of petroleum coke (sulfur content 7.84%) to powder, then mix it with 17.62g of potassium molybdate and 300g of potassium hydroxide, place it in a microwave heating furnace with a microwave frequency of 2450MHz, and vacuumize it at a microwave power of 0.3 Under the condition of kw, the temperature was raised to 500°C and kept constant for 40 minutes, then nitrogen gas was introduced to normal pressure, and the temperature was raised to 800°C for 20 minutes under the condition of microwave power of 0.3kw for activation.

[0036] Grind the above-mentioned activated sample into powder, weigh it, add it to the acetic acid solution with a concentration of 30wt% according to the mass ratio of 1:15, stir well, and then carry out solid-liquid separation, and then wash the obtained solid with deionized water , until the pH value of the filtrate was neutral, the obtained fixed sample was placed in a vacuum drying oven, and dried at 150° C. for 6 h under vacuum conditions...

Embodiment 2

[0039] Grind 100g of petroleum coke (sulfur content 7.84%) to powder, then mix it with 13.54g of potassium molybdate and 300g of potassium hydroxide, put it in a microwave heating furnace with a microwave frequency of 2450MHz, and vacuum it. Under the condition of kw, the temperature was raised to 400°C and kept constant for 60 minutes, then nitrogen gas was introduced to normal pressure, and the temperature was raised to 700°C for 30 minutes under the condition of microwave power of 0.2kw for activation.

[0040] Grind the above-mentioned activated sample into powder, weigh it, add it to the acetic acid solution with a concentration of 40wt% according to the mass ratio of 1:10, stir well, and then carry out solid-liquid separation, and then wash the obtained solid with deionized water , until the pH value of the filtrate was neutral, the obtained fixed sample was placed in a vacuum drying oven, and dried at 120° C. for 8 h under vacuum conditions.

[0041] Weigh 20g of the dr...

Embodiment 3

[0043] Grind 100g of petroleum coke (sulfur content 7.84%) to powder, then mix it with 22.04g of potassium molybdate and 300g of potassium hydroxide, put it in a microwave heating furnace with a microwave frequency of 2450MHz, and vacuum it. Under the condition of kw, the temperature was raised to 600°C and kept constant for 20 minutes, then nitrogen gas was introduced to normal pressure, and the temperature was raised to 900°C for 10 minutes under the condition of microwave power of 0.4kw to activate for 10 minutes.

[0044] Grind the above-mentioned activated sample into powder, weigh it, add it to the acetic acid solution with a concentration of 20wt% according to the mass ratio of 1:20, stir well, and then carry out solid-liquid separation, and then wash the obtained solid with deionized water , until the pH value of the filtrate was neutral, the obtained fixed sample was placed in a vacuum drying oven, and dried at 180° C. for 4 h under vacuum conditions.

[0045] Weigh 2...

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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, and the active component is Mo; the auxiliary agent is selected from Ni, Co, Fe, Cu, Zr, Ce, One or more of La, Mn, Al, the carrier is activated carbon prepared from sulfur-containing petroleum coke. In the preparation method, petroleum coke, Mo-containing compound and activator are uniformly mixed and then activated, and then the first auxiliary agent is introduced after washing and drying, and then the synthesis gas methanation catalyst is obtained after drying and roasting. The synthesis gas methanation catalyst provided by the invention has the advantages of large specific surface area, good dispersion of active metals, high reactivity, long service life, sulfur resistance and the like, and the preparation method is simple.

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 reac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/04C07C9/04B01J23/881B01J23/28B01J23/883B01J35/10
Inventor 孙晓丹张舒冬张庆军宋永一刘继华
Owner CHINA PETROLEUM & CHEM CORP
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