https://scholars.lib.ntu.edu.tw/handle/123456789/598208
標題: | Process synthesis and plantwide control of intensified extractive distillation with preconcentration for separating the minimum-boiling azeotropes: A case study of acetonitrile dehydration | 作者: | Cui C Zhang Q Zhang X Sun J Chien I.-L. I-LUNG CHIEN |
關鍵字: | Acetonitrile dehydration;Dynamic controllability;Extractive distillation;Process intensification;Process synthesis;Acetonitrile;Distillation;Distillation columns;Energy conservation;Ethylene;Ethylene glycol;Process control;Two term control systems;Energy savings;Energy-savings;Plantwide control;Pre-concentration;Synthesis control;Dehydration | 公開日期: | 2022 | 卷: | 285 | 來源出版物: | Separation and Purification Technology | 摘要: | An investigation of the process synthesis and plantwide control of energy saving extractive distillation with preconcentration to produce anhydrous acetonitrile with ethylene glycol as a heavy entrainer is reported. In the process synthesis, process intensification introduces stripping column modification, heat integration, thermal coupling, vapor recompression, liquid side stream, and dividing wall column. These measures achieve significant reductions in energy costs of more than 30 % and the total annual cost of approximately 20 % as compared to the base case. The subsequent proposal of robust plantwide control structures brings about stable regulatory control when large ± 20% disturbances of throughput and composition are introduced. These control structures feature several decentralized proportional-integral temperature controller loops without composition measurements. The dynamic responses indicate that the control properties of complex arrangements can be comparable to those of a regular sequence, however, the intensified arrangements have the potential to offer significant energy savings. ? 2021 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121986210&doi=10.1016%2fj.seppur.2021.120397&partnerID=40&md5=b113ab21a0cdce7c6f159634f98509b9 https://scholars.lib.ntu.edu.tw/handle/123456789/598208 |
ISSN: | 13835866 | DOI: | 10.1016/j.seppur.2021.120397 |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。