Preparation method of catalyst for carbon dioxide reforming of methane to produce synthesis gas

A reforming catalyst, carbon dioxide technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problems of cumbersome preparation process, unobtainable carrier, and high cost , to achieve the effect of cumbersome preparation process, conducive to industrialization and high cost

Inactive Publication Date: 2014-02-12
SHANXI LUAN MINING GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the problems existing in the above-mentioned synthesis gas reforming catalysts of methane and carbon dioxide: the carrier is not easy to obtain, the cost is high, the preparation process is cumbersome, the service life is short and many other factors that are not conducive to the promotion of industrialization, and the lignite activated carbon with high specific surface area, cheap and easy to obtain is adopted As a carrier, the supported catalyst is prepared by further modification of ammonia water and high-pressure ultrasonic cavitation. While improving the catalyst activity, it overcomes the problem of deactivation caused by carbon deposition, which greatly prolongs the life of the catalyst, and the catalyst preparation process is simple. Easy to operate, conducive to industrialization

Method used

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  • Preparation method of catalyst for carbon dioxide reforming of methane to produce synthesis gas
  • Preparation method of catalyst for carbon dioxide reforming of methane to produce synthesis gas
  • Preparation method of catalyst for carbon dioxide reforming of methane to produce synthesis gas

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Effect test

Embodiment 1

[0030] Mix lignite activated carbon with a particle size of about 22 mesh and ammonia water with a mass concentration of 2% at a solid-to-liquid ratio of 1:2, and soak for 6 hours in an airtight manner, and then place it in a small airtight pressurized reactor for high temperature High-pressure hydrothermal reaction, the reaction conditions are: the reaction pressure is 2MPa, the reaction time is 6h, after the reaction is completed, it is naturally cooled, and dried at 110°C for 4h to obtain the modified lignite activated carbon.

[0031]The modified lignite activated carbon was mixed with a cobalt nitrate solution with a mass concentration of 20% at a solid-to-liquid ratio of 1:2, and was impregnated for 30 minutes under the conditions of ultrasonic frequency of 28MHz and 4MPa. Put it into a muffle furnace after drying, and roast in a nitrogen atmosphere for 5 hours at a roasting temperature of 500° C. to obtain the synthesis gas catalyst for carbon dioxide reforming of methan...

Embodiment 2

[0034] Mix lignite activated carbon with a particle size of 20-40 mesh and ammonia water with a mass concentration of 5% according to a solid-to-liquid ratio of 1:2, and airtightly soak for 6 hours, then place it in a small airtight pressurized reactor for High temperature and high pressure hydrothermal reaction, the reaction conditions are: the reaction pressure is 2MPa, the reaction time is 6h, after the reaction is completed, it is naturally cooled, and dried at 110°C for 4h to obtain the modified lignite activated carbon.

[0035] The modified lignite activated carbon was mixed with a 20% cobalt nitrate solution at a mass concentration of 1:2, and impregnated for 30 minutes at a frequency of 28 MHz ultrasonic and 4 MPa. Put it into a muffle furnace after drying, and roast in a nitrogen atmosphere for 5 hours at a roasting temperature of 500° C. to obtain the synthesis gas catalyst for methane carbon dioxide reforming of the present invention. The conversion rates of methan...

Embodiment 3

[0037] Mix lignite activated carbon with a particle size of 20-40 mesh and ammonia water with a mass concentration of 8% at a solid-to-liquid ratio of 1:2, and seal and soak for 6 hours, then place it in a closed small pressurized reactor for high temperature High-pressure hydrothermal reaction, the reaction conditions are: the reaction pressure is 2MPa, the reaction time is 6h, after the reaction is completed, it is cooled naturally, and dried at 110°C for 4h to obtain the modified lignite activated carbon.

[0038] The modified lignite activated carbon was mixed with a cobalt nitrate solution with a mass concentration of 20% at a solid-to-liquid ratio of 1:2, and impregnated for 30 minutes at a frequency of 28 MHz ultrasonic and 4 MPa. Put it into a muffle furnace after drying, and roast in a nitrogen atmosphere for 5 hours at a roasting temperature of 500° C. to obtain the synthesis gas catalyst for methane carbon dioxide reforming of the present invention. The conversion r...

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Abstract

The invention discloses a preparation method of a catalyst for carbon dioxide reforming of methane to produce synthesis gas. The preparation method comprises the following steps: mixing lignite active carbon with ammonia water according to a proportion and performing closed immersion to obtain modified lignite active carbon; placing the modified lignite active carbon in a closed pressurized temperature control reaction kettle; performing hydrothermal reaction at certain temperature and under certain voltage; naturally cooling and drying to prepare ammonia water modified lignite active carbon; finally performing ultrasonic immersion treatment on the ammonia water modified lignite active carbon and cobalt nitrate solution under certain pressure and drying and baking to prepare the catalyst. The catalyst prepared by the method has the advantages of readily available raw materials, good catalytic activity, long life and easiness in industrial production.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for reforming methane and carbon dioxide to produce synthesis gas, specifically a method for preparing a catalyst for synthesis gas reforming by using lignite activated carbon, which is subjected to high-temperature and high-pressure hydrothermal reaction with ammonia water, and then prepared by a high-pressure ultrasonic impregnation method. gas catalyst method. technical background [0002] In the existing coke production process, coke oven gas rich in methane is directly evacuated or burned, which cannot be effectively utilized and pollutes the environment. Many workers have conducted research on how to effectively utilize methane and carbon dioxide. Methane carbon dioxide reforming can theoretically generate carbon monoxide and hydrogen with a molar ratio of 1:1, which is suitable for the synthesis of liquid fuels. It not only realizes polygeneration and clean utilization of coal resource...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J37/34C01B3/40
CPCY02P20/52Y02P20/54
Inventor 高雪明张瑞生程志红王振钟雪晴湛燕王建波宋科飞李玉云刘连超杨恩波
Owner SHANXI LUAN MINING GRP
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