Carbon dioxide absorption in packed bed of lithium orthosilicate pebbles

Room-Temperature Absorption of Carbon Dioxide on an Improved Soda Lime-Based Absorber

“…There are different processes for CO 2 capturing in literature. These include cryogenic separation, membrane-based separation, absorption in amine-based solutions, adsorption on metal organic frame work (MOF) materials, and absorption on lithium-based ceramic materials. − The cryogenic process involves high cooling costs as compared to the other process. The cryogenic process may be adopted in pre-combustion and oxy-combustion processes where the outlet CO 2 concentration in the flue gas is comparatively higher (say, higher by 30–50%).…”

“…The CO 2 adsorption capacity of MOFs and absorption in amine-based solutions is lower than that in the soda lime- and lithium-based ceramic materials. Among these different CO 2 absorbents, lithium-based ceramic materials are suitable for higher-temperature applications, whereas soda lime-based ceramic beads can be used for room-temperature applications. − …”

“…Carbon dioxide (CO 2 ) concentration in air is increasing day by day due to the advancement of civilization, industrialization, and rapid deforestation. 1 Working in confined or enclosed spaces, viz., coal mines, closed biolabs, clean rooms, space shuttles, space stations, airplanes, etc., needs continuous removal of CO 2 at room temperature to maintain its concentration well below the permissible limit. But the maintenance of CO 2 concentration in an enclosed or confined working atmosphere at room temperature is a challenging task, and it is necessary to maintain a safe and healthy working environment for the employees working in such unfavorable environments.…”

“…The reported absorption capacity of CO 2 on soda lime is about 33%, 2 which is almost similar to that of lithium orthosilicate. 1 Lithium orthosilicate is suitable for CO 2 capturing, but at higher temperatures, e.g., flue gases which generally release at above 150 °C temperature, 1 whereas soda lime is suitable for CO 2 capturing at room temperature. 2 The absorption capacity of soda lime increases with increase in moisture content in soda lime beads.…”

“…Carbon dioxide (CO 2 ) concentration in air is increasing day by day due to the advancement of civilization, industrialization, and rapid deforestation . Working in confined or enclosed spaces, viz., coal mines, closed biolabs, clean rooms, space shuttles, space stations, airplanes, etc., needs continuous removal of CO 2 at room temperature to maintain its concentration well below the permissible limit.…”