文献类型：期刊文献

英文题名：A kinetics study on the absorption of carbon dioxide into a mixed aqueous solution of methyldiethanolamine and piperazine

作者：Zhang, X.[1]; Zhang, C.-F.[1]; Qin, S.-J.[1]; Zheng, Z.-S.[1]

机构：[1]E China Univ Sci & Technol, Res Inst Chem Technol, Shanghai 200237, Peoples R China

年份：2001

卷号：40

期号：17

起止页码：3785

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：2001496751966);WOS:【SCI-EXPANDED(收录号:WOS:000170573600009)】；

语种：英文

外文关键词：Absorption - Amines - Solutions

摘要：A kinetics study of the absorption of CO2 into a mixed aqueous solution of methyldiethanolamine (MDEA) and piperazine (PZ) was investigated by a laboratory disk column within 303-343 K and a weight ratio of MDEA to PZ 50/3-50/10 with a total amine concentration of 3.0 M. A renewal mechanism was proposed, and a kinetic model was established on the basis of the existence of piperazine carbamate. The second-order rate constant of CO2 with PZ was expressed as k(p) = 4 x 10(10) exp(-4059.4/T), which was in good agreement with that of Bishnoi and Rochelle (Chem. Eng. Sci. 2000, 55, 5531). The concentrations of various species in solution were also calculated, and the results indicated that the concentration of free PZ was very low for its special reactivity to form the protonated PZ and carbamate in the MDEA solution when encountering CO2.