Method for preparing lithium silicate serving as high-temperature CO2 absorbing material

Abstract

The invention discloses a method for preparing lithium silicate material absorbing high-temperature CO2 by taking artificial zeolite as raw material, and provides a process for preparing lithium silicate material serving as high-temperature CO2 absorbent by use of artificial zeolite. Lithium silicate precursors are prepared from LiNO3 and artificial zeolite in different proportions by ion exchange and sol-gel methods, and the lithium silicate material is synthesized by roasting the lithium silicate precursors at a temperature between 600 and 900 DEG C for 2 to 8 hours. The lithium silicate material prepared absorbs CO2 in a thermogravimetric analyzer at a temperature between 400 and 700 DEG C in CO2 and N2 atmosphere in different proportions. Aiming at the problem of a great amount of high-temperature CO2 emitted from power plants and flue gas, the method recycles carbon resources and reduces CO2 emission. The method synthesizes the lithium silicate material by taking cheap artificial zeolite and LiNO3 as raw material and adopting the ion exchange and sol-gel methods. Compared with the prior art, the method has the advantages of cheap and readily available artificial zeolite used as the raw material, reduction in preparation cost of the lithium silicate material and easiness of realizing industrial production.

Description

technical field [0001] The invention relates to a kind of high temperature CO with artificial zeolite as raw material 2 The preparation method of the absorption material lithium silicate belongs to the absorption and separation of the high-temperature CO discharged from the power plant and the flue gas 2 field. Background technique [0002] Synthetic zeolite is called zeolite molecular sieve, which is a kind of porous mineral crystal material with water-containing framework silica (aluminum) salt with wonderful pore structure and unique crystal chemical properties. Because of its unique crystal structure and crystal chemical properties, zeolite molecular sieves not only have predictable and efficient molecular sieving functions, but also have many excellent functions such as ion exchange, absorption and catalytic properties, so they are widely used in agriculture, building materials, chemical industry, environmental protection, Many fields such as energy, medicine, nationa...

AI Technical Summary

Problems solved by technology

[0007] So far, it has not been seen to use cheap artificial zeolites as raw materials to prepare high-temperature CO 2 Reports on invention patents and research literature of the absorbent lithium silicate