Lithium orthosilicate for CO2 capture with high regeneration capacity: Kinetic study and modeling of carbonation and decarbonation reactions

Thermokinetic and conductivity analyzes of the high CO2 chemisorption on Li5AlO4 and alkaline carbonate impregnated Li5AlO4 samples: Effects produced by the use of CO2 partial pressures and oxygen addition

“…Among the various high-temperature solid sorbents that have been studied, different lithium-containing ceramics have been proposed as possible CO 2 captors. Li 4 SiO 4 [8][9][10][11][12] , Li 2 CuO 2 [1,13,14] , Li 2 ZrO 3 [15][16][17][18] , Li 5 AlO 4 [19,20] and Li 8 SiO 6 [12,[21][22][23] , among others, are all examples of ceramic sorbents with interesting capture properties from the point of view of high CO 2 capture capacities, high carbonation reaction rates at elevated temperatures and in some cases, good stabilities and cyclic properties.…”

Kinetics of the Carbonation Reaction of Lithium Orthosilicate Using a Typical CO2 Concentration of Combustion Gases

“…Advantages of using lithium orthosilicate in high temperature processes include the high sorption rate and capacity, excellent cyclability properties and raw materials of low cost 13,14,[20][21][22][23][24] . It also requires a much lower temperature to be recovered when compared to the CaO.…”

“…It also requires a much lower temperature to be recovered when compared to the CaO. According to Amorim et al (2016) 24 , the advantages of Li 4 SiO 4 also include the fast carbonation and decarbonation kinetics, the use in 48-repeated reaction cycles, as well as the good mechanical properties. In general, a higher concentration of CO 2 is beneficial for the CO 2 sorption of Li 4 SiO 4 sorbents 17,25,26 .…”

“…Accordingly, in this work, carbonation tests with CO 2 were carried out in a thermogravimetric analyzer model DTG-60 (Shimadzu, Japan). Reactions were conducted in two sequential steps 24,31 : (1) pre-treatment and (2) thermal analysis ((i) non-isothermal and (ii) isothermal conditions):…”

“…1. The solid is basically composed of agglomerates of granular particles, mostly in polyhedral shape 23,24 . In addition, the solid surface possess a smooth feature, confirming the low surface area found by the porous structure analysis.…”