Absorption rate into a MDEA aqueous solution blended with piperazine under a high CO2 partial pressure

作者：Zhang, X; Wang, J; Zhang, CF^*; Yang, YH; Xu, JJ

来源：Industrial & Engineering Chemistry Research, 2003, 42(1): 118-122.

DOI：10.1021/ie020223t

• Marangoni effect

The absorption rate of carbon dioxide into a methyldiethanolamine (MDEA) aqueous solution blended with piperazine (PZ) under a high carbon dioxide partial pressure was studied by an experimental packed column. Also, the results indicated that the absorption rate of carbon dioxide at a high carbon dioxide partial pressure was larger than that of the calculation value from the kinetics model of atmospheric pressure because the Marangoni effect was strengthened by the elevated carbon dioxide partial pressure. The kinetics model modified by a carbon dioxide partial pressure was obtained as follows: N-CO2 = fH(CO2)[D-CO2(k(MDEA)C(MDEA) k(PZ)C(PZ))](1/2)(P - P*), where f = 0.83 [ln(P/100)](0.8) 1.0 and 100 kP(a) less than or equal to P less than or equal to 625 kP(a). The simulation of a commercial absorption column has verified this modified model successfully.

• 出版日期2003-1-8
• 单位东华大学; 华东理工大学; 上海交通大学