Enhanced CO2 capture using organic acid structure modified waste eggshell derived CaO sorbent

CO2 Capture at Medium to High Temperature Using Solid Oxide-Based Sorbents: Fundamental Aspects, Mechanistic Insights, and Recent Advances

“…The combination of different precursors and pretreatment conditions (i.e., temperature, heating rate, p CO 2 , and p H 2 O ) provide rich opportunities to tune the physical properties of the CaO. Another popular approach to enhance the cyclic CO 2 uptake of CaO-based sorbents was to treat them with organic acids, e.g., citric acid or formid acid, which resulted in increased surface areas and pore volumes. − However, no significant long-term stabilization of the morphology was achieved in most of these studies, and owing to the high cost of the acids, this approach has not been pursued recently …”

Biomass/Biochar carbon materials for CO2 capture and sequestration by cyclic adsorption processes: A review and prospects for future directions

“…For purification processes or in the cases with high curved convex isotherms, the TSA process is preferable compared to other adsorption processes [203]. After the adsorption step in the TSA sequences, the bed temperature rises to accomplish the regeneration process using a hot non-condensable gas purge or steam [102,103]. For instance, a four-step TSA process for CO 2 adsorption is illustrated in Fig.…”

“…Egg and chicken meat are two of key ingredients in the food and pastry industries. According to the reports, up to 5150 million eggs are produced per year to supply the world requirement [102,103], that results in many tons of eggshells as wastes in the hatchery process [103]. Generally, three costly techniques including landfilling [279], composting [280] and incineration [281] are employed to manage the eggshell wastes.…”

CO2 Adsorption Performance and Kinetics of Ionic Liquid-Modified Calcined Magnesite

“…However, high investment, corrosion of the equipment and high regeneration energy consumption are problems for liquid adsorbents applied in industry. Researchers across the globe have conducted studies on solid adsorbents, including layered double hydroxide-derived [3,4], CaO-based [5,6], MgO-based [7,8] and alkaline ceramic-based adsorbents [9,10] for pre-combustion CO 2 capture, and carbon-based [11,12], zeolite-silica-based [13,14], metal-organic frameworkbased [15,16] and alkali metal carbonate-based adsorbents [17][18][19] for post-combustion CO 2 capture. Furthermore, the adsorption process, such as two stage vacuum swing adsorption (VPSA), temperature swing adorption (TSA), temperature/vacuum swing adsorption (TVSA) [20] and sound-assisted fluidized bed reactor [21], has also been investigated for implementation in industrial applications.…”