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

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 ...

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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 800-1200 °C and a pressure of 1-6 MPa for 2-5 hours to obtain modified activated carbon, and place the modified activated carbon in The metal catalyst solution to be supported is impregnated for 3-6 hours, and the reforming catalyst can be obtained after roasting. There are many steps to prepare the catalyst by using this method, and the reaction temperature is relatively high, and the reaction time is long

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