Absorption of Carbon Dioxide into Aqueous Solutions of 2-Piperidineethanol: Kinetics Analysis

被引:46
作者
Paul, Subham [1 ]
Ghoshal, Aloke K. [1 ]
Mandal, Bishnupada [1 ]
机构
[1] Indian Inst Technol Guwahati, Dept Chem Engn, Gauhati 781039, Assam, India
关键词
HINDERED AMINES; CO2; 2-AMINO-2-METHYL-1-PROPANOL; ALKANOLAMINES; REMOVAL; BLENDS; MONOETHANOLAMINE; DIETHANOLAMINE; GASES;
D O I
10.1021/ie800723b
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This work presents the kinetics of the reaction of CO2 with aqueous 2-piperidineethanol (2-PE) solutions at 303, 313, and 323 K within the amine concentration range of 0.14-1.13 kmol m(-3) using a wetted-wall column absorber. The reaction was described by zwitterionic mechanism to interpret the kinetic data. A qualitative C-13 NMR analysis has been carried out for 2-PE solution in D2O after reaction with CO2, which has indicated the formation of bicarbonate ion. The reaction order was found to be in between 1.10 and 1.12 with respect to amine for the above-mentioned concentration range. The kinetic rate parameters were calculated and presented at each experimental condition. The second-order rate constants, k(2), were obtained as 696, 1147, and 2047 m(3) kmol(-1) s(-1) at 303, 313, and 323 K, respectively, with an activation energy of 45.2 kJ mol(-1).
引用
收藏
页码:1414 / 1419
页数:6
相关论文
共 31 条
[1]   REACTION-MECHANISM AND KINETICS OF AQUEOUS-SOLUTIONS OF 2-AMINO-2-METHYL-1-PROPANOL AND CARBON-DIOXIDE [J].
ALPER, E .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1990, 29 (08) :1725-1728
[2]  
Astarita G, 1983, GAS TREATING CHEM SO
[3]  
BLAUWHOFF PMM, 1984, CHEM ENG SCI, V39, P207, DOI 10.1016/0009-2509(84)80021-4
[4]   Online NMR spectroscopic study of species distribution in MEA-H2O-CO2 and DEA-H2O-CO2 [J].
Boettinger, Wolfram ;
Maiwald, Michael ;
Hasse, Hans .
FLUID PHASE EQUILIBRIA, 2008, 263 (02) :131-143
[5]   KINETICS OF CARBAMATE FORMATION AND BREAKDOWN [J].
CAPLOW, M .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1968, 90 (24) :6795-&
[6]   CO2 ABSORPTION IN AQUEOUS-SOLUTIONS OF HINDERED AMINES [J].
CHAKRABORTY, AK ;
ASTARITA, G ;
BISCHOFF, KB .
CHEMICAL ENGINEERING SCIENCE, 1986, 41 (04) :997-1003
[7]   Mutual diffusion coefficients of some aqueous alkanolamines solutions [J].
Chang, LC ;
Lin, T ;
Li, MH .
JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2005, 50 (01) :77-84
[8]   REACTION OF CO2 WITH ETHANOLAMINES [J].
DANCKWERTS, PV .
CHEMICAL ENGINEERING SCIENCE, 1979, 34 (04) :443-446
[9]  
Doraiswamy L.K., 1984, HETEROGENEOUS REACTI, V2
[10]   Kinetics of absorption of carbon dioxide into solutions of N-methyldiethanolamine plus water [J].
Ko, JJ ;
Li, MH .
CHEMICAL ENGINEERING SCIENCE, 2000, 55 (19) :4139-4147