Carbon dioxide reduction method

Abstract

The invention discloses a carbon dioxide reduction method which comprises the following steps: by using carbon dioxide as a raw material and a NaOH, Na2CO3 or Na2SO3 water solution with a certain concentration as a reaction solution and adding 0.2-5.0 g / L composite photocatalyst of oxide of Ti, Bi, W, V, Mo or Y, putting in an internal irradiation, external irradiation, suspension or liquid-film photocatalytic reactor, and introducing carbon dioxide at 10-60 mL / minute to carry out photocatalytic carbon dioxide reduction reaction at normal temperature for 0.5-5 hours by using a mercury lamp, xenon lamp or sunlight as a light source, thereby obtaining formic acid, methanol, methane and other carbon dioxide reduction products. The method has the advantages of simple technique and green reaction process, can catalytically convert the carbon dioxide into useful chemical products, and thus, has favorable economic benefit and environmental benefit.

Description

technical field

[0001] The invention belongs to the technical field of carbon dioxide comprehensive utilization. Specifically, a carbon dioxide reduction method. Background technique

[0002] Today, when the world's energy is increasingly scarce and the environmental protection situation is becoming increasingly severe, solar energy has attracted more and more attention from the world because of its abundant energy, pollution-free and safe use. Therefore, the development and utilization of solar energy has always attracted people's great interest.

[0003] Carbon dioxide is an indispensable basic carbon resource in all life activities including human beings. In nature, the photosynthesis of green plants is the starting point for the fixation of carbon dioxide and the synthesis of organic substances, and is a necessary condition for the survival of all organisms on the earth. Coal and oil are the accumulated products of photosynthesis. In recent years, the consumption of pe...