Comparison of different extractive distillation processes for 2-methoxyethanol/toluene separation: Design and control
| Autor: | Yangqin Tu, Lianjie Guo, Qingsong Li, Yuanyu Tian, Lanyi Sun, Na Yu, Lumin Li |
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| Rok vydání: | 2017 |
| Předmět: |
2-Methoxyethanol
Work (thermodynamics) Waste management Chemistry business.industry General Chemical Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Toluene Computer Science Applications Volumetric flow rate Controllability chemistry.chemical_compound 020401 chemical engineering Azeotropic distillation Scientific method Extractive distillation 0204 chemical engineering 0210 nano-technology Process engineering business |
| Zdroj: | Computers & Chemical Engineering. 99:117-134 |
| ISSN: | 0098-1354 |
| DOI: | 10.1016/j.compchemeng.2017.01.025 |
| Popis: | In this work, the extractive distillation process is proposed for the first time to separate the 2-methoxyethanol/toluene mixture. Three configurations, including the conventional extractive distillation (CED), extractive distillation under reduced pressure (EDRP) and extractive dividing-wall column (EDWC) processes are investigated in order to obtain the optimal separation configurations. Their economic feasibilities are estimated by calculating the total annual cost (TAC). The results show that the EDRP process operating at a relatively low pressure is more economic than that operating at the lowest pressure. The TAC of the EDRP and EDWC processes can be saved by 4.88% and 11.04% respectively compared to the CED process, thus the EDWC sequence is superior to the other two processes in economic benefits. Three control strategies are proposed to investigate the controllability of the EDWC process. The results show that the improved dynamic structure can overcome large feed disturbances in flowrate and composition effectively. |
| Databáze: | OpenAIRE |
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