(A) study on the absorption process for $CO_2$ removal from flue gas using AMP (2-Amino-2-methyl-1-propanol) and aqueous ammonia solutionAMP (2-Amino-2-methyl-1-propanol) 수용액과 암모니아 수용액을 이용한 배가스 이산화탄소 처리용 흡수 공정에 대한 연구

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Chemical absorption process for the reduction of $CO_2$ emission was investigated. Sterically hindered amine and ammonia aqueous solution have been suggested as alternative absorbents due to their promising advantages over conventional amine absorbent. Sterically hindered amine of 2-Amino-2-methyl-1-propanol (AMP) and ammonia aqueous solution were used as absorbents for $CO_2$ removal in this study. The fundamental design data for aqueous ammonia absorbent were investigated. Correlation and prediction of the solubility of $CO_2$ in aqueous ammonia solution at the arbitrary temperature and concentration were established using the Pitzer’s excess Gibbs energy. Reaction between $CO_2$ and aqueous ammonia solution were studied through the analysis of $CO_2$ contained ammonia absorbent by the solid-NMR, FT-IR and $^{13}C$ NMR measurement. FT-IR and $^{13}C$ NMR measurement revealed that $CO_2$ absorption reactions were influenced by the pH of solution. In the beginning stage of $CO_2$ absorption, $CO_2$ is absorbed through a very fast reaction of carbamate formation. Below the solution pH of 9.5, $CO_2$ is absorbed through a relatively slow reaction of bicarbonate formation. The maximum amount of carbamate occurred at about the $CO_2$ loading of 0.3 (or pH 9.5) for 5 - 25 wt% ammonia absorbent. Speciation through $^{13}C$ solid NMR revealed that the precipitates in aqueous ammonia solution of 5 - 25 wt% is ammonium bicarbonate and other solid product are not found in the experiment range. It is favorable to use the carbamate formation reaction in a chemical absorption process, and consequently, the optimum operating condition for $CO_2$ absorption process using aqueous ammonia absorbent is the rich- $CO_2$ loading of 0.3. The rate constant of $CO_2$ absorption reaction in aqueous ammonia solution was obtained using a stirred cell in the temperature range from 293 to 337 K. The rate constants were correlated in the form of Arrhenius equation, and the ac...
Advisors
Hong, Won-Hiresearcher홍원희researcher
Description
한국과학기술원 : 생명화학공학과,
Publisher
한국과학기술원
Issue Date
2008
Identifier
303588/325007  / 000995243
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2008. 8., [ xiii, 134 p. ]

Keywords

carbon dioxide; absorption; AMP; ammonia; 이산화탄소; 흡수; AMP; 암모니아; carbon dioxide; absorption; AMP; ammonia; 이산화탄소; 흡수; AMP; 암모니아

URI
http://hdl.handle.net/10203/29042
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=303588&flag=dissertation
Appears in Collection
CBE-Theses_Ph.D.(박사논문)
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