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Description: A series of high capacity CO2 adsorbents was developed using silica supports impregnated with tetraethylenepentamine and diethanolamine. For confirming the amine loadings and examining the residual porosity of materials, the sorbents were characterized by nitrogen adsorption porosimetry, thermogravimetric analysis. The effects of concentration and composition of amine blends, silica supports, adsorption temperature on CO2 adsorption were investigated. The experimental results showed that the silica material with the largest pores, MSU-F, had the highest CO2 capacity after impregnation with a mixture of 40wt% tetraethylenepentamine and 30wt% diethanolamine. The mechanism study confirmed that CO2 was adsorbed onto the sorbent through the formation of carbamate species.

- In this investigation, we used an impregnation method using methanol solvent and ultrasould for synthesis a series of excellent CO2 adsorbents. The preparation method is more simple than other techniques. - The developed materials were characterized by several techniques including TGA, BET, FT-IR. - The developed adsorbents showed excellent CO2 adsorption capacities. For 100 kPa CO2, the adsorption capacity at 50°C was 5.91 mmol/g. The adsorbent showed an excellent CO2 selectivity and good stability, confirming that the developed material is a potential candidate for practical application. - The investigation also confirmed that CO2 was adsorbed onto the sorbents through the formation of carbamate species.

Organisation: Research Institute of Creative Education (RICE)

Innovator(s): Nguyen Hoang Dam Thuyen, Nguyen Hoang An, Nguyen Thuy Duong, Do Phuong Linh, Nguyen Minh Hang

Category: Environment

Country: Vietnam

Gold Award