Catalyst for preparing low-carbon olefin through carbon dioxide hydrogenation

Abstract

The invention relates to a catalyst for preparing low-carbon olefin through carbon dioxide hydrogenation, belongs to the technical field of composite materials, and particularly relates to preparation and application of a perovskite-graphite phase carbon nitride composite material. After the composite material is subjected to surface processing, a large number of hydroxyl groups and amino groups exist on the periphery of the structure, and strong interaction can be generated between the composite material and perovskite metal. The catalyst has a unique electronic structure and good chemical stability, the olefin selectivity is improved through interaction between the surface-modified carbon nitride and perovskite iron oxide, and the surface-modified carbon nitride provides a reliable scheme for preparing olefin through hydrogenation reaction.

Description

technical field

[0001] The invention relates to a catalyst for hydrogenation of low-carbon olefins and its preparation method and application, in particular to the preparation of perovskite and graphite phase carbon nitride and multifunctional functional group composite materials and its CO or CO 2 Application of hydrogenation to olefins. Background technique

[0002] In the tense situation of world petroleum energy, it is of great strategic significance to vigorously develop the production of olefins from synthesis gas. CO or CO 2 Hydrogenation to prepare low-carbon olefins has the advantages of short process and low energy consumption. However, the F-T product is limited by the Anderson-Schulz-Flory (A-S-F) distribution, which has the problems of wide product distribution and low yield of total olefins. Therefore, it is of great significance to study and develop catalysts for directional conversion of target products.

[0003] Graphite phase carbon nitride has a large ...