Preparation of monolithic catalyst and application method thereof

Abstract

The invention relates to preparation of monolithic catalyst for a magneto-optical-thermal coupled enhanced reactor and an application method thereof. A preparation method of the catalyst comprises thefollowing steps: with metal foam materials such as foamed iron, foamed aluminum and foamed copper as carriers loading photocatalytic materials such as CeO2, BiVO4 and WO3 on the surfaces of the metalfoams by a sol-gel method, and then loading cocatalysts such as Fe-FeOx, Cu-CuOx, Ni-NiOx and Co-CoOx on the surfaces of the catalytic materials by a deposition-precipitation method to prepare the monolithic catalyst. The catalyst can be applied to a photocatalytic CO2 reduction reaction in the magnetic-optical-thermal coupled enhanced reactor. The monolithic catalyst structure prepared by the preparation method provided by the invention facilitates engineering application of the three-field coupled catalytic process; in addition, the foamed metals in the monolithic catalyst not only serve asthe carriers, but also achieve the magnetocaloric effect and the photothermal effect; the purpose of driving high-efficiency conversion of CO2 by solar energy can be achieved; a novel ideal way is provided for producing an oxygen-containing derivative of hydrocarbon through photocatalytic CO2 reduction.

Description

technical field [0001] The invention relates to the preparation and application of a monolithic catalyst oriented to a "magnetic-optical-thermal" coupling enhanced reactor, especially the designed monolithic catalyst structure is more conducive to the engineering application of the three-field coupling catalytic process. Background technique [0002] With the rapid development of economy and society, human activities consume a lot of fossil energy, resulting in the CO in the atmosphere 2 concentration continued to increase rapidly. As a major greenhouse gas, CO 2 Concentration increase is the main cause of global warming, which seriously threatens the survival and sustainable development of human beings. On the other hand, CO 2 It is also a valuable carbon resource. Effective capture and utilization of it can not only alleviate various environmental problems caused by the greenhouse effect, but also solve social problems caused by energy shortages. So, research on solar-...

AI Technical Summary

Problems solved by technology

Photocatalytic reduction of CO 2 Technology has been developing and breaking through in recent years, and various photocatalytic materials emerge in an endless stream, but the single use of photocatalytic reduction of CO 2 Still facing many problems: (1) CO 2 Low conversion rate and poor product selectivity; (2) semiconductor energy potential (photogenerated electron and hole potential) and CO 2 The reduction potential does not match; (3) photocatalytic CO 2 The reduction is a multi-electron multi-step reaction, and the reaction kinetics restrict the photocatalytic efficiency

[0003] For traditional photocatalysis, thermal catalysis, and photothermal synergistic catalysis of CO 2 The problem of energy conversion in the reduction conversion process, the "magnetic-optical-thermal" coupling enhanced reactor is based on the method of sunlight frequency division utilization and "magnetic-optical-thermal" three-field coupling, which can realize solar energy-driven CO 2 The purpose of efficient conversion, to solve the problem of low utilization rate of solar energy

Images