Amino acid salts for CO₂ capture at flue gas temperatures

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• 作者：Steven Chiao-Chien Wei ; Graeme Puxty ; Paul Feron
• 关键词：Absorbent ; Taurine ; Wetted-Wall Column ; VLE ; CO2 solubiity ; Overall mass transfer coefficient
• 刊名：Energy Procedia
• 出版年：2013
• 出版时间：2013
• 年：2013
• 卷：37
• 期：Complete
• 页码：485-493
• 全文大小：222 K

文摘

An amino acid salt, potassium taurate has been chosen as a high temperature absorbent in this study due to its low volatility and high absorption rate. The densities and viscosities of 2M-6 M taurate solution have been determined over the temperature range from 293K to 353K. The CO₂ solubility of taurate solutions has been measured using a stirred-cell reactor. It has been found that the CO₂ solubility of taurate solutions is comparable to that of alkanolamines at high temperature. The absorption rate of CO₂ into CO₂ free and CO₂ loaded taurate solutions were obtained using a wetted-wall column. The KG of 4 M taurate at 353K is similar in magnitude to the KG of 5 M MEA at 313K. It has also been found that the KG of taurate decreased with increased CO₂ loading, but the values for KG of taurate solutions are still comparable to CO₂ loaded 5 M MEA solution.