期刊
CHEMICAL ENGINEERING SCIENCE
卷 263, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2022.118088
关键词
Extractive distillation; Conceptual design; Integration of preconcentration and; extractive distillation; Energy saving; Ternary multi-azeotropic mixture
资金
- National Natural Science Foundation of China [22178045, 22008023]
- Natural Science Foundation of Liaoning Province [2021BS062]
- Fundamental Research Funds for the Central Universities [DUT21RC (3) 109]
- LiaoNing Revitalization Talents Program [XLYC1906016]
In this study, an efficient three-column extractive distillation process (TCED-IDC) was designed for separating ternary multi-azeotropic mixtures with a large content of one component. The energy and economic advantages of the TCED-IDC processes were demonstrated through two case studies.
Azeotropic mixtures with a large content of one component are often encountered. Several energy -efficient three-column extractive distillation processes with integrated distillation column (TCED-IDC) are conceptually designed for separating ternary multi-azeotropic mixtures with a large content of one component on the basis of the corresponding four-column extractive distillation (FCED) processes. The energy consumption and economic advantages of the TCED-IDC processes which realize the integration of extractive distillation function and preconcentration function are demonstrated by two cases, metha-nol/acetonitrile/benzene ternary azeotrope with chlorobenzene as solvent (Case1) and methyl acetate/ ethyl acetate/methanol ternary azeotrope with dimethyl sulfoxide as solvent (Case2). The economic sav-ings resulting from the integration of preconcentration function and extractive distillation function depend heavily on feed compositions and azeotropic compositions. In terms of assumed feed composi-tions, the TCED-IDC process can achieve 27.61%/21.64% economic costs reduction in Case1 and 49.66%/1.73% economic costs reduction in Case2 compared to the TCED process and the FCED process. (c) 2022 Elsevier Ltd. All rights reserved.
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