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Zheng YZ, Zhao R, Zhang YC, Zhou Y. A FTIR and DFT Combination Study to Reveal the Mechanism of Eliminating the Azeotropy in Ethyl Propionate-n-Propanol System with Ionic Liquid Entrainer. Int J Mol Sci 2023; 24:10597. [PMID: 37445775 DOI: 10.3390/ijms241310597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 06/12/2023] [Accepted: 06/20/2023] [Indexed: 07/15/2023] Open
Abstract
Ionic liquids (ILs) have presented excellent behaviors in the separation of azeotropes in extractive distillation. However, the intrinsic molecular nature of ILs in the separation of azeotropic systems is not clear. In this paper, Fourier-transform infrared spectroscopy (FTIR) and theoretical calculations were applied to screen the microstructures of ethyl propionate-n-propanol-1-ethyl-3-methylimidzolium acetate ([EMIM][OAC]) systems before and after azeotropy breaking. A detailed vibrational analysis was carried out on the v(C=O) region of ethyl propionate and v(O-D) region of n-propanol-d1. Different species, including multiple sizes of propanol and ethyl propionate self-aggregators, ethyl propionate-n-propanol interaction complexes, and different IL-n-propanol interaction complexes, were identified using excess spectroscopy and confirmed with theoretical calculations. Their changes in relative amounts were also observed. The hydrogen bond between n-propanol and ethyl propionate/[EMIM][OAC] was detected, and the interaction properties were also revealed. Overall, the intrinsic molecular nature of the azeotropy breaking was clear. First, the interactions between [EMIM][OAC] and n-propanol were stronger than those between [EMIM][OAC] and ethyl propionate, which influenced the relative volatilities of the two components in the system. Second, the interactions between n-propanol and [EMIM][OAC] were stronger than those between n-propanol and ethyl propionate. Hence, adding [EMIM][OAC] could break apart the ethyl propionate-n-propanol complex (causing the azeotropy in the studied system). When x([EMIM][OAC]) was lower than 0.04, the azeotropy still existed mainly because the low IL could not destroy the whole ethyl propionate-n-propanol interaction complex. At x(IL) > 0.04, the whole ethyl propionate-n-propanol complex was destroyed, and the azeotropy disappeared.
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Affiliation(s)
- Yan-Zhen Zheng
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Rui Zhao
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Yu-Cang Zhang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Yu Zhou
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
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Lee HY, Yeh MH, Chen YY, Chen CL. Design and control of a comprehensive Ethylenediamine (EDA) process with external/internal heat integration. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yin M, Hua C, Lu P, Zhang H, Bai F. Design and Control of Pressure-Swing Heat Integration Distillation for the Trichlorosilane Purification Process. ACS OMEGA 2022; 7:9254-9266. [PMID: 35350368 PMCID: PMC8945141 DOI: 10.1021/acsomega.1c05943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 01/21/2022] [Indexed: 06/14/2023]
Abstract
Trichlorosilane (TCS) is a crucial intermediate product in the polysilicon manufacturing process, and its purification consumes a significant amount of energy. The design and control of the TCS heat integration pressure-swing distillation (HIPSD) process was investigated using Aspen Plus V8.4 and Aspen dynamics in this study. Three partial processes and one full HIPSD process were investigated by adjusting the operating conditions and rationally configuring the material flow. Compared with the conventional distillation process, the partial and full HIPSD can reduce total annual cost by 15.75 and 27.39%, respectively. The aforementioned process was controlled robustly by adding the ratio of reboiler heat duty to feed (Q R/F) feedforward control structure and the ratio of recycle to feed (F REC/F) control structure. In addition, the performance of the control structure was evaluated by introducing ±10% disturbances of the feed flowrate and composition. To compare the performance of the control structure, the integral squared error value is combined with the dynamic response curve. The full HIPSD scheme can resist ±10% disturbances of flow and composition with the best economic performance. This study has certain reference significance for the distillation process and control strategy design of TCS in the polysilicon manufacturing process.
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Affiliation(s)
- Min Yin
- Innovation
Academy for Green Manufacture, Chinese Academy
of Sciences, Beijing 100190, PR China
- School
of Chemical and Engineering, University
of Chinese Academy of Sciences, Beijing 100190, PR China
- Key
Laboratory of Green Process and Engineering, Institute of Process
Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Chao Hua
- Innovation
Academy for Green Manufacture, Chinese Academy
of Sciences, Beijing 100190, PR China
- Key
Laboratory of Green Process and Engineering, Institute of Process
Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Ping Lu
- Innovation
Academy for Green Manufacture, Chinese Academy
of Sciences, Beijing 100190, PR China
- Key
Laboratory of Green Process and Engineering, Institute of Process
Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Haohao Zhang
- Innovation
Academy for Green Manufacture, Chinese Academy
of Sciences, Beijing 100190, PR China
- School
of Chemical and Engineering, University
of Chinese Academy of Sciences, Beijing 100190, PR China
- Key
Laboratory of Green Process and Engineering, Institute of Process
Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Fang Bai
- Innovation
Academy for Green Manufacture, Chinese Academy
of Sciences, Beijing 100190, PR China
- School
of Chemical and Engineering, University
of Chinese Academy of Sciences, Beijing 100190, PR China
- Key
Laboratory of Green Process and Engineering, Institute of Process
Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
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Guo J, Hu B, Li Z, Zheng Y, Zhou C, Li Q. Vapor-liquid equilibrium experiment and extractive distillation process design for the azeotrope ethyl propionate n-propanol using ionic liquid. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118492] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Seo C, Lee H, Lee M, Lee JW. Energy Efficient Design through Structural Variations of Complex Heat-integrated Azeotropic Distillation of Acetone-Chloroform-Water System. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Cui C, Zhang Q, Zhang X, Sun J, Chien IL. Dynamics and control of thermal- versus electrical-driven pressure-swing distillation to separate a minimum-boiling azeotrope. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.119839] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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