Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Reactive distillation for synthesis of glycerol carbonate via glycerolysis of urea
AU - Lertlukkanasuk, Noppon
AU - Kiatkittipong , Worapon
AU - Arpornwichanop, Amornchai
AU - Aiouache, Farid
AU - Assabumrungrat, Suttichai
PY - 2013/8
Y1 - 2013/8
N2 - This study developed a new process for synthesis of glycerol carbonate via glycerolysis of urea by reactive distillation. Missing thermodynamic parameters were estimated by various group contribution methods. The results of Gibbs free energy showed that Gani's method provided the lowest deviation. Equilibrium and kinetic model parameters of the glycerolysis obtained from batch experiments were employed for the simulation of the reactive distillation using Aspen Plus® software. High conversion of glycerol was achieved by reducing reactant loss in distillate through an increase in the number of stripping and reaction stages and a decrease in the number of rectifying stages. Moreover, glycerol and urea in distillate were recycled to the reactive section by increasing reflux ratio to a reasonable value. The suitable design and operating parameters were achieved at 3 stripping stages, 3 reactive stages, no rectifying stage, reboiler heat duty of 15 kW and reflux ratio of 2. This offered 93.6% conversion of glycerol, and 90.0% yield of glycerol carbonate with 100% purity in the final product. Compared with conventional in vacuo process, reactive distillation promoted glycerol conversion by 29.1% and saved in energy consumption by 37.1%.
AB - This study developed a new process for synthesis of glycerol carbonate via glycerolysis of urea by reactive distillation. Missing thermodynamic parameters were estimated by various group contribution methods. The results of Gibbs free energy showed that Gani's method provided the lowest deviation. Equilibrium and kinetic model parameters of the glycerolysis obtained from batch experiments were employed for the simulation of the reactive distillation using Aspen Plus® software. High conversion of glycerol was achieved by reducing reactant loss in distillate through an increase in the number of stripping and reaction stages and a decrease in the number of rectifying stages. Moreover, glycerol and urea in distillate were recycled to the reactive section by increasing reflux ratio to a reasonable value. The suitable design and operating parameters were achieved at 3 stripping stages, 3 reactive stages, no rectifying stage, reboiler heat duty of 15 kW and reflux ratio of 2. This offered 93.6% conversion of glycerol, and 90.0% yield of glycerol carbonate with 100% purity in the final product. Compared with conventional in vacuo process, reactive distillation promoted glycerol conversion by 29.1% and saved in energy consumption by 37.1%.
KW - Glycerol
KW - Glycero carbonate
KW - Glycesolysis of urea
KW - Reactive distilltion
U2 - 10.1016/j.cep.2013.05.001
DO - 10.1016/j.cep.2013.05.001
M3 - Journal article
VL - 70
SP - 103
EP - 109
JO - Chemical Engineering and Processing: Process Intensification
JF - Chemical Engineering and Processing: Process Intensification
SN - 0255-2701
ER -