121st General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Event Hall
Time 4월 19일 (목요일) 11:00~12:30
Code INOR.P-104
Subject Characteristics of alkaline metal salts promoted MgO on CO2 absorption and desorption in mid-temperature
Authors Jeong-Min Lee, Jin-Su Kwak, Kang Yeong Kim, Kyung-Ryul Oh, Young-Uk Kwon*
Department of Chemistry, Sungkyunkwan University, Korea
Abstract It has been reported that MgO based materials show different CO2 absorption and desorption behavior depending on its morphology. The synthesis of MgO/C with flowerlike morphology reported by Li et al. was adopted to make the most of surface area effect for CO2 capture. We expected flowerlike MgO/C and alkaline metal salts to be mixed well attributed to high surface area of MgO/C. After mixing, amorphous carbon was removed by thermal treatment. It is known that alkaline metal salts promote CO2 absorption process of MgO at intermediate temperature ranged from 200 to 500 ℃. We select K2CO3 and KNO3 as promoters among various alkaline metal salts and characterize their promoting effects in terms of ratio and preparation condition of sample. K2CO3-promoted MgO has different CO2 absorption tendencies according to K/Mg ratio. It seems that there is optimized ratio of potassium to magnesium for effective CO2 capture. We observe that conversion rate of MgO for CO2 capture increases with the increase of K/Mg ratio in case of K2CO3-promoted MgO. Meanwhile, in regard to KNO3-promoted MgO with LiNO3 additive, we focus on its activation phenomenon during a cycle rather than a tendency related to quantitative effect of promoter. The details will be presented in the poster.
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