High temperature carbon dioxide adsorbent and preparation method

Abstract

The invention discloses a high temperature carbon dioxide adsorbent and its preparation method, which belong to the field of emission reduction technology in greenhouse effect. According to the invention, SiO2 and Li2CO3 are taken as a raw material, sodium carbonate and potash are taken as an adulterant, and a lithium silicate ceramic material codoped by Na and K elements can be obtained through batch mixing and sintering at high temperature. The high temperature carbon dioxide adsorbent and preparation method have the advantages that the prepared lithium silicate material has stable performance for absorbing carbon dioxide, the repetition rate usage is high, and the industrial production is easy.

Description

technical field [0001] The invention relates to the field of emission reduction in the greenhouse effect, in particular to a method for preparing a high-temperature carbon dioxide adsorbent, that is, a Na and K co-doped lithium silicate ceramic material. The adsorbent can be used for tail gas flues of industrial enterprises using fossil fuels, etc. CO2 is directly processed during the emission process. Background technique [0002] At present, fossil fuels such as coal and petroleum are still the main energy materials in heavy industrial enterprises. The burning of fossil fuels will inevitably release a large amount of high-temperature carbon dioxide, which will increase the carbon dioxide content in the atmosphere and intensify the greenhouse effect. There are many materials that absorb carbon dioxide at room temperature, and the absorption rate is also very high, some even reach 80% of the theoretical absorption value, but there is a premise that carbon dioxide must be at ...

AI Technical Summary

Problems solved by technology

[0003] Japan, in 1997, carried out research on the absorption of carbon dioxide by lithium silicate ceramic materials, but the absorption rate was low at that time, less than 10%, and the reaction time was long and the energy consumption was large (Nakagawa R, Ohashi T.A novel method of CO2capture from high temperature gases[J].Electrochem Soc,1998,145:1344-1346)

In China, Wang Yinjie and others have also done some research on the absorption of carbon dioxide by lithium silicate, but the absorption rate, stability and repeatability are not very high (Wang Yinjie, Qi Lu, Wang Weijun. Research on the absorption of CO2 by lithium silicate at high temperature[J] .Journal of Inorganic Chemistry, 2006,22(2):268-272)