Abstract
Herein, we report the effects of doped K and Al on the carbon dioxide (CO2) adsorption performance of the Li4SiO4-based adsorbents. The CO2 adsorption capacity of 0.8wt% K and 1.5wt% Al doped Li4SiO4 is ∼2.2 times and ∼1.3 times higher than that of the pristine Li4SiO4 at 500 and 600°C, respectively. The kinetic study further indicated that the reaction rates of the lithium diffusion process is greatly improved by K and Al doping, and the lithium diffusion rate of 0.8wt%K and 1.5wt% Al doped Li4SiO4 is ∼2 times higher than that of the pristine Li4SiO4 at 575–650°C. K and Al doping increases the adsorption capacity of Li4SiO4-based adsorbents, and widens its effective adsorption temperature range
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