Title of article :
Optimal design of mixed acid esterification and isopropanol dehydration systems via incorporation of dividing-wall columns
Author/Authors :
Wang، نويسنده , , San-Jang and Chen، نويسنده , , Wun-Yu and Chang، نويسنده , , Wen-Teng and Hu، نويسنده , , Chi-Chih and Cheng، نويسنده , , Shueh-Hen، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
17
From page :
108
To page :
124
Abstract :
This study explores the design of a reactive distillation system and that of a heterogeneous azeotropic system by incorporating dividing-wall column (DWC). The first system involves the esterification of mixed acid (acetic acid and propionic acid) with methanol. Simulation studies are carried out for conventional reactive distillation sequence as well as for reactive dividing-wall distillation system. Both systems are optimized by an iterative optimization procedure. Optimal design results show that the reactive dividing-wall system saves steam consumption by 45.2% and reduces total annual costs (TAC) by 34.5%. The second case investigated is a heterogeneous azeotropic distillation system involving dehydration of crude isopropyl alcohol with cyclohexane as entrainer. Two optimal separation systems are generated, including one with a single-dividing wall column and one with a double-dividing wall column. In comparison with an energy-efficient azeotropic distillation sequence containing two stripping columns by Chang et al. (2012) [1], simulation results show that the former two systems can cut steam usage further by 6.0%. The two systems save about 5.4–6.1% in terms of TAC. DWCs prove to be superior to the convention distillation systems with respect to both cost and energy efficiency.
Keywords :
Dividing-wall column , Reactive distillation , Heterogeneous azeotropic distillation , Optimal design
Journal title :
Chemical Engineering and Processing: Process Intensification
Serial Year :
2014
Journal title :
Chemical Engineering and Processing: Process Intensification
Record number :
1611717
Link To Document :
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