Document Type : Regular Article
Authors
1 Department of Chemical Engineering, University of Sistan and Baluchestan, Zahedan, Iran
2 Center for process Integration and Control, Chemical Engineering department, University of Sistan and Baluchestan, Zahedan, Iran
Abstract
During the regeneration-coupling process, a novel, plantwide control framework for the diethyl oxalate production unit is provided in this article. This study's benefit is that it uses process improvements that do not possess the intricacy and expense of the two prior structures described by Zhu and Luyben. The development of a plantwide control structure for this process was completed in two stages. The efficiency of the process was initially evaluated using a straightforward structure, with the primary goal being to prevent the usage of concentration controllers and complex cascading mechanisms to the greatest extent feasible. Due to the presence of persistent variations in the process effluents in the original structure, it was determined that there were numerous disruptions present that influenced the response during both recycle streams in the process and created variations. During the second phase, using trial and error to implement a functional adjustment in the process, the minimum amount of recycle stream during which the variations were fully removed was separated from the process, and a novel feeding stream was inserted. Following implementing these modifications, it was discovered that the effluent variations of the process are fully removed with just two concentration controllers, and this structure demonstrates instantaneous plantwide control over receiving disturbances.
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Main Subjects
- Song, H. Y., Jin, R. H., Kang, M. R. and Chen, J., “Progress in synthesis of ethylene glycol through C1 chemical industry routes”, Chinese J. Catal., 34, 1035 (2013).
- Wang, B., Ma, X., Yu, G. and Mao, L., “Optimization of cyclical process for CO coupling regeneration reactions”, Computers & Chemical Engineering, 24 (2), 1337 (2000).
- Fang, J., Wang, B., Li, Z. and Xu, G., “Study on the reaction of CO coupling to oxalate”, Reaction Kinetics and Catalysis Letters, 80, 293 (2003). (https://doi.org/10.1023/B:REAC.0000006138.57139.16).
- Zhu, J., Hao, L., Bai, W., Zhang, B., Pan, B. and Wei, H., “Design of plantwide control and safety analysis for diethyl oxalate production via regeneration-coupling circulation by dynamic simulation”, Computers & Chemical Engineering, 121, 111 (2019).
- Zhu, J., Hao, L., Sun, Y., Zhang, B., Bai, W. and Wei, H., “A sustainable process design to produce diethyl oxalate considering NOx elimination”, Computers & Chemical Engineering, 115, 198 (2018).
- Xu, Y., Ma, X. B. and Li, Z. H., “Simulation analysis on tube-shell type fixed bed reactor for synthesis of diethyl oxalate in gaseous phase”, React. Eng.Technol., 16, 45 (2008).
- Zhu, J., Hao, L., Sun, Y., Zhang, B., Bai, W. and Wei, H., “A sustainable process design to produce diethyl oxalate considering NOx elimination”, Computers & Chemical Engineering, 115, 198 (2012).
- Zhu, J., Hao, L., Bai, W., Zhang, B., Pan, B. and Wei, H., “Design of plantwide control and safety analysis for diethyl oxalate production via regeneration-coupling circulation by dynamic simulation”, Computers & Chemical Engineering, 121, 111 (2019).
- Luyben, W. L., “Simplified plantwide control structure for the diethyl oxalate process”, Computers & Chemical Engineering, 126, 451 (2019).
- Zhang, L. Q., Wang, J. Z. and Zhu, X. L., “Prediction of atmospheric VLE for the binary system diethyl oxalate-ethanol by using visual basic”, Wuhan, Univ. Technol. Mater. Sci., 16, 66 (2001).
- Hu, Y. R., Li, Y., Fan, X., Xia, W., Yuan, X. J., Xü, H. Y. and Chen, X. H., “Study on vapor-liquid equilibrium of ethyl nitrite-ethanol binary system at normal pressure”, Journal of Natural Gas Chemical Industry, 40, 35 (2015).
- Zhu, Y. -P. and Luo, Z. -H., “Reaction mechanism and kinetics for the catalytic coupling reaction from carbon monoxide to diethyl oxalate”, Asia-Pacific Journal of Chemical Engineering, 7 (6), 901 (2012).
- Ma, X. B., Xu, G. H., Chen, J. W. and Chen, H. F., “Kinetics of carbon monoxide catalytic coupling to diethyl oxalate in gaseous phase”, Journal of Chemical Industry Engineering, 46, 50 (1995).
- Meng, F., Xu, G. and Guo, Q., “Kinetics of the catalytic coupling reaction of carbon monoxide to diethyl oxalate over Pd-Fe/α-Al2O3 catalyst”, Journal of Molecular Catalysis, A: Chemical, 201 (1), 283 (2003).
- Chen, J. W., Xu, G. H., Li, Z. H. and Chen, H. F., “Kinetics of regeneration reaction for CO coupling”, Journal of Chemical Industry and Engineering, 44, 66 (1993). (in Chinese).
- Meng, F., Xu, G., Guo, R., Yan, H. and Chen, M., “Kinetic study of carbon monoxide coupling reaction over supported palladium catalyst”, Chemical Engineering and Processing: Process Intensification, 43 (6), 785 (2004).
- Luyben, W. L., Distillation design and control using AspenTM simulation, John Wiley and Sons, (2013).
- Uchiumi, S. -I., Ataka, K. and Matsuzaki, T., “Oxidative reactions by a palladium–alkyl nitrite system”, Journal of Organometallic Chemistry, 576 (1), 279 (1999).
- Zhang, T., “Study on the risk in decomposition of ethyl nitrite”, Journal of Safety Science and Technology, 11, 135 (2015).
- Luyben, W. L., Tyréus, B. D. and Luyben, M. L., Plantwide process control, McGraw-Hill, (1999).
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