Copper-based MOF carbonization derived catalytic material and preparation method and application thereof

Abstract

The invention belongs to the technical field of heterogeneous catalysis and particularly discloses a copper-based MOF carbonization derived catalytic material and a preparation method and applicationthereof in the field of unsaturated hydrocarbon selective hydrogenation. The copper-based MOF carbonization derived catalytic material and the preparation method have the advantages that by controlling pyrolysis conditions and using organic ligands as the self-sacrificial template to reduce copper ions in an in-situ manner, the metal active center of the prepared catalytic material is highly dispersed, the specific surface area of the catalytic material is larger than that of a traditional supported catalyst, and the catalytic material has rich mesoporous and micropore structures and can provide a sufficient place for hydrogenation reaction; nanoscale, sub-nanometer even atomic-scale metal particles in the structure of the catalytic material have extremely high surface energy, so that theactivity and selectivity of the catalytic material are much better than those of common metal catalysts and even can be on a par with those of precious-metal catalysts; the catalytic material is suitable for activity the carbon-carbon double bonds or triple bonds of unsaturated hydrocarbon and can adsorb free hydrogen to perform selective hydrogenation reaction and the like; the catalytic materialis low in synthesizing cost and can provide a brand new thought for an existing catalytic hydrogenation process.

Description

technical field [0001] The invention belongs to the technical field of heterogeneous catalysis, and in particular relates to a copper-based MOF carbonization-derived catalytic material and a preparation method and application thereof. Background technique [0002] In recent years, the problem of energy shortage has become a common concern around the world. Although energy diversification is the general trend, oil is still an important energy source in the development of the world economy. Moreover, the rational use of existing material resources is far more important than the development and creation of new energy sources. It is easy to come by, so oil will still play an irreplaceable role on the world economic stage for a long time to come. [0003] In petroleum resources, the content of unsaturated olefins and alkynes is very rich. However, the unsaturated hydrocarbons containing adjacent carbon atoms not only have a small difference in boiling point and close volatility, ...

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Problems solved by technology

[0004] Commercial catalysts for the selective hydrogenation of unsaturated hydrocarbons are mainly noble metal series such as Au, Pd, and Pt. Although noble metals have a high dissociation and activation ability for hydrogen, they also show very good performance when applied to the selective hydrogenation of unsaturated hydrocarbons. High activity, but precious metal resources in nature are limited and expensive, thus limiting its long-term development in the field of catalysis

Studies have found that non-noble metal Cu also has better catalytic activity and higher selectivity for this type of reaction. However, during the preparation and practical application of non-noble metal catalysts, metal particles are prone to agglomeration, which leads to the separation of reactants and metal active centers. The contact area is reduced, which reduces the utilization rate of the catalyst

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