Preparation method and application of calcium oxide based absorbing material using diatomite as carrier

Abstract

The invention discloses a preparation method of calcium oxide based absorbing materials using diatomite as carriers. The preparation method uses natural minerals diatomite as the carriers and supported calcium oxide based materials are synthesized through impregnation and precipitation methods. Under high-temperature conditions, the calcium oxide based materials prepared by adopting the method can absorb CO2 in mixed gas of CO2 and N2. Compared with the prior art, the carrier material, i.e. the diatomite used in the method is cheap and is easy to obtain, the prepared adsorbents have the advantages of high CO2 absorbing capacity and high adsorbing stability in the multi-time circulation process, the greenhouse effect is relieved, the CO2 emission is reduced and the environmental improvement cost is reduced.

Description

technical field

[0001] The invention relates to a preparation method and application of a calcium oxide-based absorbent material with diatomite as a carrier, which belongs to the absorption and separation of high-temperature CO emitted from power plants and flue gases. 2 field. Background technique

[0002] In recent years, with the rapid economic development of various countries, CO 2 Emissions are increasing by CO 2 The resulting greenhouse gas effect has attracted worldwide attention. CO emissions from fossil fuel thermal power plants 2 The amount of CO caused by various human activities accounts for about 2 More than 30% of the total emissions are CO 2 The largest stationary source of emissions, so control and recovery of CO emitted by thermal power plants 2 It is of great significance to solve the problem of greenhouse effect. Due to the high temperature of the gas discharged from high-temperature furnaces such as thermal power plants, the CO in the flue gas 2 T...