TY - JOUR
T1 - Azeotropic distillation with reaction on tert-butyl alcohol dehydration to isobutylene
AU - Sun, Bin
AU - Chen, Xing Fu
AU - Song, Jian Guo
AU - Tang, Ji Hai
AU - Fei, Zhao Yang
AU - Chen, Xian
AU - Cui, Mi Fen
AU - Qiao, Xu
N1 - Publisher Copyright:
© 2015, Editorial Office of Chemical Engineering (China). All right reserved.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - Tert-butyl alcohol dehydration by azeotropic reactive distillation was studied through experiment and simulation, with cyclohexane and sulfonic acid resin as azeotropic agent and catalyst, respectively. The technical feasibility of isobutylene production from dehydration process was confirmed by the experiment. The kinetic subroutine was programmed and powered by Fortran, the azeotropic reactive distillation was simulated by Aspen Plus, and NRTL was used as thermodynamic model. The results were consistent well with the experimental data, indicating the practicability of the simulation method. Process parameters including cooler temperature, phase separation temperature, distillation stage number, boil-up flow rate, feed stage, and mass fraction of tert-butyl alcohol in feed stream were investigated. The optimized cooler and phase separation temperature was 2 ℃ and 50 ℃ respectively with tert-butyl alcohol flow rate 0.25 g/min, and 10 g catalyst, when the feed inlet was any one of 2-5 stage, the number of distillation stage was 6 and the boil-up flow rate was 3.0 g/min. Tert-butyl alcohol conversion reached over 96.00%, with the feed mass fraction of tert-butyl alcohol above 75% under the optimal conditions.
AB - Tert-butyl alcohol dehydration by azeotropic reactive distillation was studied through experiment and simulation, with cyclohexane and sulfonic acid resin as azeotropic agent and catalyst, respectively. The technical feasibility of isobutylene production from dehydration process was confirmed by the experiment. The kinetic subroutine was programmed and powered by Fortran, the azeotropic reactive distillation was simulated by Aspen Plus, and NRTL was used as thermodynamic model. The results were consistent well with the experimental data, indicating the practicability of the simulation method. Process parameters including cooler temperature, phase separation temperature, distillation stage number, boil-up flow rate, feed stage, and mass fraction of tert-butyl alcohol in feed stream were investigated. The optimized cooler and phase separation temperature was 2 ℃ and 50 ℃ respectively with tert-butyl alcohol flow rate 0.25 g/min, and 10 g catalyst, when the feed inlet was any one of 2-5 stage, the number of distillation stage was 6 and the boil-up flow rate was 3.0 g/min. Tert-butyl alcohol conversion reached over 96.00%, with the feed mass fraction of tert-butyl alcohol above 75% under the optimal conditions.
KW - Azeotropy
KW - Dehydration
KW - Reactive distillation
KW - Tert-butyl alcohol
UR - http://www.scopus.com/inward/record.url?scp=84948469515&partnerID=8YFLogxK
U2 - 10.3969/j.issn.1005-9954.2015.10.005
DO - 10.3969/j.issn.1005-9954.2015.10.005
M3 - 文章
AN - SCOPUS:84948469515
SN - 1005-9954
VL - 43
SP - 21
EP - 25
JO - Huaxue Gongcheng/Chemical Engineering (China)
JF - Huaxue Gongcheng/Chemical Engineering (China)
IS - 10
ER -