Methane carbon dioxide reforming catalyst and preparation method and using method thereof

A technology for reforming catalysts and carbon dioxide, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve the problem of long reaction time, high reaction temperature, and multiple catalyst steps And other issues

Active Publication Date: 2017-02-15
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] CN 103566936 A discloses "a method for preparing a catalyst for reforming methane and carbon dioxide to produce synthesis gas". The method is to mix 20-40 mesh lignite activated carbon with ammonia water with a mass concentration of 1%-10% in a ratio of 1:2, Soak for 6 hours, get lignite activated carbon, and then react the obtained activated carbon in a high-pressure reactor with a temperature of 8

Method used

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  • Methane carbon dioxide reforming catalyst and preparation method and using method thereof
  • Methane carbon dioxide reforming catalyst and preparation method and using method thereof
  • Methane carbon dioxide reforming catalyst and preparation method and using method thereof

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Effect test

Embodiment 1

[0044] 1) Take 30g of lignite below 100 mesh, add H with the same quality as lignite 2 O, 5g of cobalt-based-metal mixture, fully stir the three evenly. The cobalt-based metal mixture is Co-FeS with a Co content of 5%wt.

[0045] 2) Put the mixture prepared in step 1) into the high-pressure reactor, feed the CO pressure to 4MPa, set the heating rate in the reactor to 5°C / min, raise the temperature to 350°C, and set the stirring speed at the same time It is 250r / min.

[0046] 3) Let the reaction system of step 2) continue for 30 minutes, stop heating, cool the system to room temperature, take out the modified lignite, filter, dry and carbonize;

[0047] 4) Activate at low temperature after carbonization. Set the reaction temperature at 600°C and the reaction pressure at 7 MPa. Activate by passing in water vapor activated by an anion device. The reaction time is 4 hours. After natural cooling, the methane carbon dioxide reforming catalyst C is prepared.

Embodiment 2

[0049] 1) Take 30g of lignite below 100 mesh, add H with the same quality as lignite 2 O, 5g of cobalt-based-metal mixture, fully stir the three evenly. The cobalt-based metal mixture is Co-FeS with a Co content of 5%wt.

[0050] 2) Put the mixture prepared in step 1 into the autoclave, and then feed CO and H into the autoclave 2 The mixture to 4MPa, set the stirring speed of the autoclave to 250r / min, and the heating rate of the reaction system to 5°C / min, raise the temperature of the system to 350°C, and at the same time turn on the ultrasonic vibrator installed outside the autoclave, Allow the lignite in the system to fully react.

[0051] 3) According to steps 3 and 4) in Example 1, the catalyst D containing Co metal was prepared.

Embodiment 3

[0053] 1) Take 30g of lignite below 100 mesh, add H with the same quality as lignite 2 O, 5g of cobalt-based-metal mixture, fully stir the three evenly. Cobalt-based metal mixtures are Co-Fe 2 o 3 、Co-Fe 3 o 4 , Co-FeO, wherein the content of Co is 5%wt.

[0054] 2) Catalysts D1, D2, and D3 prepared according to steps 2) and 3) in Example 2.

[0055] 3) Using Co-based metal catalysts containing different iron oxides for reforming reaction, the corresponding methane and carbon dioxide conversion rates are shown in Tables 3 and 4 below.

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Abstract

The invention discloses a methane carbon dioxide reforming catalyst and a preparation method and a using method thereof. The methane carbon dioxide reforming catalyst is prepared by loading active metals onto a carbon material as a carrier, wherein in terms of percent by weight, the carbon material accounts for 80-98wt%, a cobalt active component accounts for 1-12wt%, and an iron active component accounts for 1-8wt%; the carbon material is generated after a resultant H2 of a subcritical H2O-CO reaction modifies lignite. The preparation method comprises the following steps: crushing the lignite into granules below 100-mesh first and then uniformly mixing the coal granules with a cobalt-based metal mixture and H2O; then, inflating CO to adjust the reaction temperature and the like to form a subcritical reaction system, and modifying the lignite through subcritical H2O-CO to prepare a methane carbon dioxide reforming catalyst carrier. Through the preparation method, the reaction can be performed at relatively low temperature, so that the temperature of the reaction system is reduced, and thus compared with other methods, the preparation method has the advantage of energy conservation.

Description

technical field [0001] The invention relates to a methane carbon dioxide reforming catalyst, a preparation method and a use method thereof, and belongs to the technical field of catalyst preparation. Background technique [0002] The carbon dioxide reforming reaction of methane can convert greenhouse gases (CH 4 +CO 2 ) into synthesis gas (CO+H 2 ), due to the structural characteristics of high stability of methane molecules; the electron transfer of carbon dioxide requires up to 20.4eV of energy. To achieve efficient conversion of methane and carbon dioxide through reforming reactions, it is necessary to solve the problem that the high-temperature reactivity and selectivity of reforming reactions are limited by thermodynamics. It is well known that the catalyst can reduce the activation energy of the reforming reaction and improve the conversion efficiency of the feed gas. Therefore, the preparation of cheap, highly active and stable reforming catalysts has always been ...

Claims

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Application Information

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IPC IPC(8): B01J23/75C01B3/40C10J1/20
CPCY02P20/52B01J23/75C01B3/40C01B2203/0238C01B2203/1052C10J1/20
Inventor 张国杰徐英刘继伟孙映晖侯鹏张永发
Owner TAIYUAN UNIV OF TECH
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