Amino acid salts for CO2 capture at flue gas temperatures

作者：Wei Chiao Chien^*; Puxty Graeme; Feron Paul

来源：Chemical Engineering Science, 2014, 107: 218-226.

DOI：10.1016/j.ces.2013.11.034

• CO2 capture
• Overall mass transfer coefficient
• Amino acid salts
• Kinetics
• CO2 solubility
• High temperature absorbent

The amino acid salt potassium taurate has potential for use as a high temperature absorbent for post combustion CO2 capture, because of its low volatility and high absorption rate. In this study, the densities and viscosities of 2-6 M taurate solution were determined over the temperature range of 293-353 K. We found that the CO2 solubility of taurate solutions, measured using a stirred cell reactor, is comparable to that of alkanolamines at high temperatures. The absorption rate of CO2 into CO2-free arid CO2-loaded Laurate solutions was determined using a wetted-wall column. The K-G of 4 M Laurate at 353 K is similar in magnitude to the K-G of 7 m monoethanolamine (MEA) at 313 K. We also found that the K-G of Laurate decreased with increased CO2 loading, although the K-G values of [aurae solutions are still comparable to CO2-loaded 7 m MEA solution. The reaction rate constant of [aurae carbamate formation in this work agrees well with published values.

• 出版日期2014-4-7