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조민선,이수출,권용목,황병욱,임은지,박명곤,정석용,이중범,김재창 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Gamma-alumina (γ-Al<sub>2</sub>O<sub>3</sub>) is used as a support or an additive material to design a potassium-based solid sorbent for CO<sub>2</sub> capture from flue gas. However, the potassium-based γ-Al<sub>2</sub>O<sub>3</sub> sorbent was deactivated due to the by-product like KAl(CO<sub>3</sub>)(OH)2 which was formed by reaction of K<sub>2</sub>CO<sub>3</sub> with γ-Al<sub>2</sub>O<sub>3</sub> during CO<sub>2</sub> sorption. To overcome this problem, novel potassium-based solid sorbents were prepared by impregnation of various support materials with 30 wt.% K<sub>2</sub>CO<sub>3</sub>. In this study, CO<sub>2</sub> sorption and regeneration properties of the potassium-based sorbents were investigated in a fixed bed reactor at low temperature range between 60℃ and 200℃. And the structure changes of the potassiumbased sorbents were investigated by power X-ray diffraction. In particular, the CO<sub>2</sub> capture capacity of a KSnI30 sorbent, which was prepared by impregnation of SnO<sub>2</sub> with K<sub>2</sub>CO<sub>3</sub>, was 83.2 mg CO<sub>2</sub>/g sorbent and was maintained without deactivation during multiple cycles. These results were due to the formation of KHCO<sub>3</sub>, which could be easily converted to K<sub>2</sub>CO<sub>3</sub> even at 200℃, without by-products, which is formed by reaction of active material, K<sub>2</sub>CO<sub>3</sub>, with a support or an additive material during CO<sub>2</sub> sorption. From these results, we conclude that SnO<sub>2</sub> can be used as a support or an additive material instead of γ-Al<sub>2</sub>O<sub>3</sub> to design the regenerable potassium-based sorbent for CO<sub>2</sub> capture at low temperatures.
Potassium-based dry sorbents for removal of sulfur dioxide at low temperatures
채호진,김재창,이수출,이수재,조민선,정석용,류춘용,권용목,황병욱,이중범 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.36 No.-
The SO2 sorption properties of dry potassium-based sorbents, prepared by impregnation of varioussupports with potassium carbonate, were investigated at the various water vapor concentrations at alevel of 5000 ppm of SO2. It was found that alkali metal-based sorbents promoted with potassiumcarbonate could be used as a sorbent for SO2 sorption at low temperatures (between 30 8C and 60 8C). Inparticular, the potassium-based sorbents showed an excellent SO2 sorption capacity of about 310 mgSO2/g sorbent in the presence of water vapor, while in the absence of water vapor, their SO2 sorptioncapacities decreased.