Studies in chemical process design and synthesis. 9. A unifying method for the synthesis of multicomponent separation sequences with sloppy product streams

Liu, Y. A.; Quantrille, Thomas E.; Cheng, Shueh Hen

doi:10.1021/ie00107a007

Cited by 21 publications

(10 citation statements)

References 17 publications

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“…Finally, the TAC is employed to evaluate each optimal solution for a given total number of trays. The TAC formula of Liu et al 27 and Douglas' costs correlations 28 according to Eq. 2 were applied.…”

Section: Resultsmentioning

confidence: 99%

“…The three design specifications, the top, side stream, and bottom compositions, are set at a purity of 99 mol % for their respective products. The optimization procedure that minimizes the OF is accomplished by first estimating the total number of stages for the first column based on the Gilliland equation and second by a similar estimation of the total number of stages for the second column 27, 28. Thirdly, the initial value of side stream flow is given based on the previously mentioned sensitivity analysis and its effluent stage.…”

Section: Problem Statement and Dwc Optimization Methodologymentioning

confidence: 99%

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Optimal Design and Economic Evaluation of Dividing‐Wall Columns

et al. 2016

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In an effort to reduce costs, a systematic optimization approach is proposed to address the energy consumption of dividing-wall columns (DWCs). This iterative optimization procedure begins by minimizing the overall heat duty using an innovative objective function within a constrained design space. A sensitivity analysis is then carried out on the manipulated variables to obtain their optimal ranges. Optimal operating parameters are obtained through the evaluation of the total annualized cost (TAC). For the separation process of benzene/toluene/o-xylene, the optimal DWC flow sheet exhibits a significant decrease in TAC when compared to conventional flow sheet optimum designs. The applied optimization method and sensitivity analysis have proven to produce results at the global optimum. This method is both practical and easily applied to other systems, even to systems with more than three components.

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Section: Resultsmentioning

confidence: 99%

Section: Problem Statement and Dwc Optimization Methodologymentioning

confidence: 99%

Optimal Design and Economic Evaluation of Dividing‐Wall Columns

et al. 2016

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show abstract

“…Also, the recovery factor of a HHK from the Fenske equation can be used as an upper bound on its recovery factor in the practical design (

D_{HHK}^{FS} / B_{HHK}^{FS} \geq D_{HHK} / B_{HHK}

). Similar arguments have been used to develop heuristic rules for nonsharp splits 29‐31 …”

Section: Proposed Formulationmentioning

confidence: 99%

Efficient generalized shortcut distillation model with improved accuracy for superstructure‐based process synthesis

Ryu

Maravelias

2020

AIChE Journal

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We propose a general shortcut distillation column model that can address a wide range of types of separations including nonsharp/sloppy splits. The model can automatically identify key components and estimate the energy requirement of a desired separation in the presence, potentially, of components with zero flow rates. To obtain more practical column height and vapor flow rates, we augment the model with constraints inspired by the Fenske equation. We also propose valid constraints to enhance the computational performance of the proposed model. Due to its flexibility and computational efficiency, the proposed model can be readily used for superstructure-based process synthesis.

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“…The TAC was obtained by summing the annual utility-related expenses and adding 10% (10-year payback period) of the installed equipment cost. Detailed calculations based on the research of Liu et al [37] and Douglas' cost correlations [38] were applied according to equation (2.1).…”

Section: Designmentioning

confidence: 99%

A comprehensive economic optimization methodology of divided wall columns for biopolyol separation

Chen

et al. 2020

R. Soc. open sci.

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Global energetic and environmental crises have attracted worldwide attention in recent years. Biomass is an important direction of development for limiting greenhouse gas emissions and replacing fossil fuel. As downstream products of biomass, some industrially valuable polyols are costly to separate via conventional distillation due to their near volatility. The use of fully heat-integrated divided wall columns (DWCs), which carry energy and equipment investment savings, is a promising technique for purifying biopolyol products. However, the design of DWCs is complex because of the greater freedom of units, so the optimization of all variables is essential to minimize the cost of separation. A response surface methodology (RSM)-based Box-Behnken design (BBD) was proposed and applied to study the interactions between groups of factors and the effects of variables on total annual cost (TAC) savings. The optimization of global variables with RSM was confirmed to be a powerful and reliable method, and the TAC savings reached 41.09% compared to conventional distillation. In short, efficient design, lower costs and energy savings for polyol separation will promote the wide application of environmentally friendly biopolyol.

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Studies in chemical process design and synthesis. 9. A unifying method for the synthesis of multicomponent separation sequences with sloppy product streams

Cited by 21 publications

References 17 publications

Optimal Design and Economic Evaluation of Dividing‐Wall Columns

Optimal Design and Economic Evaluation of Dividing‐Wall Columns

Efficient generalized shortcut distillation model with improved accuracy for superstructure‐based process synthesis

A comprehensive economic optimization methodology of divided wall columns for biopolyol separation

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