A kind of core-shell catalyst based on microwave activation for CO2 reforming of methane to synthesis gas and its preparation method

Abstract

The invention discloses a microwave-activation-based core-shell catalyst for preparing synthesis gas through methane CO2 reforming, and a preparation method thereof. According to the present invention, the core of the core-shell catalyst comprises a matrix and a metal Ni active component supported on the matrix, the shell sequentially comprises a carbon layer and a porous microwave absorbing layerfrom inside to outside, the matrix is a mesoporous Al2O3-based composite metal oxide, and the porous microwave absorbing layer is a compounded transition metal oxide layer; the method comprises: 1) loading the metal Ni active component on the mesoporous Al2O3-based composite metal oxide matrix to obtain the core, and 2) sequentially coating the surface of the core with the carbon layer and the porous microwave absorbing layer by using a molecular laminating method to obtain the core-shell catalyst for preparing synthesis gas through methane CO2 reforming; the method can substantially simplifythe production system and the process route and significantly reduce the production cost; and the prepared catalyst integrates high catalytic activity, excellent anti-coking performance and excellentanti-sintering performance.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation and relates to a methane CO 2 Catalyst for reforming synthesis gas and preparation method thereof, especially a kind of methane CO based on microwave activation 2 A core-shell catalyst for reforming synthesis gas and a preparation method thereof. Background technique [0002] The rapid development of modern industry and social economy needs to use coal, oil, natural gas, etc. as energy and raw materials. Due to the long-term consumption of large quantities, their storage capacity has declined rapidly, and it has also brought about increasingly serious environmental problems (CO 2 greenhouse gas and PM2.5 emissions). my country has less oil reserves but more natural gas and shale gas reserves, especially the discovery and exploitation of a huge amount of "combustible ice" (a kind of methane hydrate whose reserves are twice the total of coal, oil, and natural gas resources) ( Recently...

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Problems solved by technology

The dispersion of Ru in this catalyst is good, and the catalyst has better catalytic activity and stability, but, the mass content of Ru in this catalyst is 0.5wt%~4wt%, and it is still a kind of noble metal-based catalyst, and its preparation cost is higher , and its preparation method is complicated, and the above-mentioned shortcomings all affect the further popularization and application of the catalyst

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