Design and control of energy-efficient distillation columns

Kim, Young Han

doi:10.1007/s11814-016-0124-4

Cited by 18 publications

(3 citation statements)

References 80 publications

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“…Анализу затрат теплоты при ректификации жидких смесей и разработке способов энергосбережения и оптимальных схем ректификации бинарных и многокомпонентных смесей уделено большое внимание Теоретическое обоснование выбора оптимальной схемы разделения трехкомпонентной смеси как в зарубежной [1][2][3][4][5][6][7], так и в отечественной научной литературе [8][9][10][11][12][13][14]. Выбор оптимальной технологической схемы ректификации многокомпонентных смесей обычно базировался на эвристических правилах [9][10][11].…”

Section: теоретические основы химической технологииunclassified

“…Еще раз отметим, что внутреннее энергосбережение в колонне улучшается с увеличением флегмового числа согласно формуле (5). Это в полной мере подтверждают результаты расчета затрат теплоты и внутреннего энергосбережения при разделении исходной смеси с небольшим содержанием бензола и толуола в смеси с о-ксилолом: 0.05, 0.05 и 0.90 мол.…”

Section: теоретические основы химической технологииunclassified

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Theoretical Rationale for the Selection of the Optimal Scheme of Separation of the Three-Component Mixture

Захаров

Писаренко

2017

Fine Chem. Tech.

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It is theoretically justified that for the scheme of separation of three-component mixtures with the release of the high-boiling component in the first column there is a region of initial compositions for which the heat costs are the least. An expression describing the boundary of the optimality regions of different separation schemes is given. The calculation of the heat costs for both rectification schemes of the three-component mixtures performed using the Aspen Plus software package confirmed the theoretical justification for the existence of optimality regions for each of them. With the help of the concept of internal energy saving, the advantage of one or another scheme of separation of a three-component mixture is explained.

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Section: теоретические основы химической технологииunclassified

Theoretical Rationale for the Selection of the Optimal Scheme of Separation of the Three-Component Mixture

Захаров

Писаренко

2017

Fine Chem. Tech.

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“…The column cost of the DWC is higher than the conventional system, but the heat-exchanger cost is much lower, owing to the heating duty While the total number of trays in the conventional and DWC systems are similar, the DWC consumes 27% less heating energy and 41% less cooling duty. The heating duty saving is less than those applications in other practical distillation processes [19,20,28]. The complexity of the nonideal equilibrium of the products incurred a high reflux ratio in the ethanol concentration that consumed more energy to deteriorate its energy-saving performance.…”

Section: Economic Evaluationmentioning

confidence: 99%

Energy Efficiency Improvement in a Modified Ethanol Process from Acetic Acid

Kim

2016

Entropy

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For the high utilization of abundant lignocellulose, which is difficult to directly convert into ethanol, an energy-efficient ethanol production process using acetic acid was examined, and its energy saving performance, economics, and thermodynamic efficiency were compared with the conventional process. The raw ethanol synthesized from acetic acid and hydrogen was fed to the proposed ethanol concentration process. The proposed process utilized an extended divided wall column (DWC), for which the performance was investigated with the HYSYS simulation. The performance improvement of the proposed process includes a 27% saving in heating duty and a 41% reduction in cooling duty. The economics shows a 16% saving in investment cost and a 24% decrease in utility cost over the conventional ethanol concentration process. The exergy analysis shows a 9.6% improvement in thermodynamic efficiency for the proposed process.

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Membrane Separations in Biomass Processing

Mandalika,

Runge,

Ragauskas

2024

ChemPlusChem

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The development of integrated biorefineries and the greater utilization of biomass resources to reduce dependence on fossil fuel‐derived products require research emphasis not just on conversion strategies but also on improving separations associated with biorefining. A significant roadblock towards developing biorefineries is the lack of effective separation techniques evidenced by the lack of literature in this area. Additionally, high conversion yields may only be realized if effective separations generate feedstock of sufficient purity – this makes research into biomass conversion strategies all the more critical. In this review, the challenges associated with biomass separations are discussed, followed by an overview of the most appropriate separation strategies for processing biomass. One of the unit operations most appealing for biorefining, membrane separations (MS), is then considered along with a review of the recent literature utilizing this technique in biomass processing.

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Design and control of energy-efficient distillation columns

Cited by 18 publications

References 80 publications

Theoretical Rationale for the Selection of the Optimal Scheme of Separation of the Three-Component Mixture

Theoretical Rationale for the Selection of the Optimal Scheme of Separation of the Three-Component Mixture

Energy Efficiency Improvement in a Modified Ethanol Process from Acetic Acid

Membrane Separations in Biomass Processing

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