Design and multi-objective optimization of reactive pressure-swing distillation process for separating tetrahydrofuran-methanol-water

[Display omitted] •A novel and energy-saving reactive pressure-swing distillation process was designed for separating the THF-methanol-water mixture.•Energy consumption was greatly reduced by multi-objective genetic algorithm and heat-integrated optimization.•The total annual cost of the designed tw...

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Vydáno v:	Separation and purification technology Ročník 329; s. 125160
Hlavní autoři:	Liu, Xiaojing, Xu, Qilei, Ma, Cuncheng, Zhang, Fangkun, Cui, Peizhe, Wang, Yinglong, Shan, Baoming
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Elsevier B.V 15.01.2024
Témata:	Energy savings Multi-objective genetic algorithm Reactive pressure-swing distillation THF-methanol–water Reactive pressure-swing distillation Multi-objective genetic algorithm Energy savings THF-methanol–water
ISSN:	1383-5866, 1873-3794
On-line přístup:	Získat plný text
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Shrnutí:	[Display omitted] •A novel and energy-saving reactive pressure-swing distillation process was designed for separating the THF-methanol-water mixture.•Energy consumption was greatly reduced by multi-objective genetic algorithm and heat-integrated optimization.•The total annual cost of the designed two heat integration processes for the RPSD-B was greatly reduced, i.e., 45.9% and 52.2%, respectively.•The water in THF-methanol-water was fully utilized to react with ethylene oxide to generate by-product EG. The low-energy and low-cost process development and design has always been a hot topic and challenge in separating azeotropic systems in the world. In this paper, a novel, energy-saving reactive pressure-swing distillation (RPSD) was, for the first time, designed for separating the ternary mixture of tetrahydrofuran (THF)-methanol–water. In the reactive distillation column, the process of reacting water with ethylene oxide to produce ethylene glycol for the first time was used to separate THF-methanol–water mixture, then the residual mixtures were separated by two pressure-swing distillation columns. Two feasible RPSD separation processes were investigated in terms of thermodynamic modeling and T-xy phase diagram analysis to achieve optimal separation sequence. The two designed separation processes were optimized by a multi-objective genetic algorithm and heat integration to maximize economic benefit. Results demonstrated that, compared to the conventional pressure-swing distillation process, the total annual cost of the designed two heat-integrated processes based on the RPSD-B process were greatly reduced, i.e., 45.9% and 52.2%, respectively. This paper has important guiding significance for the separation and purification of multicomponent azeotropes.
ISSN:	1383-5866 1873-3794
DOI:	10.1016/j.seppur.2023.125160