Multi-core-shell structure nickel-based catalyst applied to carbon dioxide reforming reaction, and preparation method and use of multi-core-shell structure nickel-based catalyst

Abstract

The invention discloses a multi-core-shell structure nickel-based catalyst applied to the technical field of preparation of synthesis gas by reforming carbon dioxide, and a preparation method and a use method of the multi-core-shell structure nickel-based catalyst. According to the catalyst, bagasse subjected to hydro-thermal treatment is used as a carrier, nickel is used as an active component, magnesium is used as an auxiliary agent, the required catalyst is obtained after isopyknic impregnation, and the catalyst comprises, by the mass percentage, 15% of Ni, 5-15% of MgO and 70-80% of carbon. The prepared catalyst has high activity and stability, and can be kept active for at least 800 h in a carbon dioxide reforming stability experiment. The carrier of the catalyst uses low-cost bagasseas a raw material, hydrothermal carbon is prepared through a hydrothermal synthesis method, comprehensive utilization of the bagasse can be achieved, nickel and magnesium metals can be recycled through simple calcination of the used catalyst, cyclic utilization of the metals is achieved, and thus the purposes of reducing cost, saving resources and protecting the environment are achieved.

Description

Technical field

[0001] The invention belongs to the technical field of preparation of transition metal catalysts, and specifically relates to a core-shell structured nickel-based catalyst for carbon dioxide reforming reaction, and a preparation method and application thereof, and in particular to the application of the catalyst in carbon dioxide reforming to syngas . Background technique

[0002] With the realization of industrialization and the increasing use of petroleum and coal, the CO produced by their combustion 2 More and more. Data show that the concentration of carbon dioxide in the global atmosphere has risen from 280 ppm before the industrial revolution to 387 ppm now, and it is still increasing at a rate of 0.5% per year. According to estimated data released by the Intergovernmental Panel on Climate Change, by 2100, the concentration of carbon dioxide in the global atmosphere will reach 541-970 ppm. Excessive levels of carbon dioxide can cause serious environmental ...

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