Energy savings of integrated and coupled distillation systems

Rév, Endre; Emtir, M.; Szitkai, Z.; Mizsey, Péter; Fonyó, Z.

doi:10.1016/s0098-1354(00)00643-8

Cited by 60 publications

(22 citation statements)

References 8 publications

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“…The studied distillation systems are selected from different types of conventional and energy‐integrated distillation groups and the best connection is chosen from this groups referring to the column coupling and to the direction of energy integration. This selection is in accordance with several authors like3, 24 The first distillation system is a direct sequence with backward heat integration instead of forward because of its better economic and control features highlighted by Rév et al3 The same reason is behind of the choice of the forward heat integration in case of sloppy distillation structures. The base case of the comparative study is the direct sequence without energy integration.…”

Section: Distillation System Selected For the Elaboration Of The Methsupporting

confidence: 75%

“…The large energy requirement of these processes can be reduced by using energy integration like heat integration, thermocoupling, or heat pumping. Energy integration is an important method for conserving energy in the case of distillation systems, demonstrated by different authors 2–8. Annakou and Mizsey2 have studied heat‐integrated schemes and fully thermally coupled distillation columns (FTCDC) by rigorous modeling and compared them to conventional schemes.…”

Section: Introductionmentioning

confidence: 99%

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Methodology for the design and evaluation of distillation systems: Exergy analysis, economic features and GHG emissions

Kencse

Mizsey

2009

AIChE Journal

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This work presents a process design methodology that evaluates the distillation systems based on exergetic, economic, and greenhouse gas (GHG) emission aspects. The aim of the methodology is to determine how these three features should be applied in process design to obtain information about the accuracy of the design alternatives. The methodology is tested and demonstrated on three different energy-integrated distillation systems: the direct sequence with backward heat-integration (DQB), fully thermally coupled distillation column (FTCDC), and sloppy distillation system with forward heat-integration (SQF). The average relative emission saving is the highest for the DQB scheme and this sequence shows the most flexible range of use. The case studies prove the accuracy of our evaluation methodology. On the other hand, it highlights and demonstrates that the exergy analysis can predict the results of the economic study and the environmental evaluation to make the decisions, associated with process design, much simpler. V

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Section: Distillation System Selected For the Elaboration Of The Methsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Methodology for the design and evaluation of distillation systems: Exergy analysis, economic features and GHG emissions

Kencse

Mizsey

2009

AIChE Journal

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“…The backwards heat integrated direct sequence (DQB) system has good efficiencies in all cases and can be recommended for any applications. Good performance of the DQB structure is in correspondence with many previous studies [2,13,14,20]. DQB is a simple, reliable structure with good properties, its usage is recommended, especially for retrofitting, where the application of newer, complicated structures would be impossible.…”

Section: Resultssupporting

confidence: 82%

Ranking of rectification structures separating quaternary mixtures with exergy analysis

Haragovics¹,

Mizsey²

2012

Per. Pol. Chem. Eng.

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In this paper exergy analysis is applied to select the most efficient rectification structures for separation of quaternary hydrocarbon mixtures. The basis and usage of exergy analysis is shown, as well as the benefits of its application. Exergy loss and thermodynamic efficiency is calculated from basic equations of thermodynamics. The ranking, even based on exergy analysis, highly depends on the product purification prescription. Finally it is shown that heat integration of distillation columns is exergetically beneficial in a wide product purity range.Keywords exergy · distillation · quaternary mixture · thermodynamic efficiency Acknowledgement This work was supported by project OTKA Nr. 76139 as well as projects

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“…In an attempt to mitigate this, a large number of increasingly complex modifications to, and departures from, conventional distillation have been devised over the last few decades. These include: Complex distillation arrangements/column coupling (e.g., Petlyuk, multieffect, and distributed‐feed columns); Diabatic columns (in which heat is added or removed on several or all stages, allowing the column to operate more reversibly); Heat‐pumping techniques (e.g., vapor recompression (VRC) and absorption heat pumps); Heat‐integrated distillation columns (in which the rectifying section is compressed and transfers heat to the stripping section, using a combination of the first three modifications). …”

Section: Introductionmentioning

confidence: 99%

“…The literature covering these topics is vast (which is indicative of the urgency to find energy savings in distillation processes); thorough reviews and comparisons can be found in Rév et al, Nakaiwa et al, and Jana …”

Section: Introductionmentioning

confidence: 99%

Vapor recompression for efficient distillation. 1. A new synthesis perspective on standard configurations

et al. 2013

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The vapor recompression (VRC) distillation scheme is examined and compared with conventional distillation in an analysis spanning fundamental thermodynamics, high-level calculations, and rigorous simulation. The purpose of this article is three-fold: first, it provides greater insight into VRC distillation. Second, it provides a process synthesis tool to rapidly assess whether VRC is likely to be more thermodynamically favorable than conventional distillation for a given split. Third, it may be used to determine if VRC can be implemented practically. The tool presented in the article is consolidated in the form of a single chart, for which only the top and bottom product temperatures are required to determine the outcome. Using this chart, first-pass estimates can be obtained with no calculations whatsoever. The tool, which appears to be the first of its kind in this context, is validated with examples and rigorous simulation.

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Energy savings of integrated and coupled distillation systems

Cited by 60 publications

References 8 publications

Methodology for the design and evaluation of distillation systems: Exergy analysis, economic features and GHG emissions

Methodology for the design and evaluation of distillation systems: Exergy analysis, economic features and GHG emissions

Ranking of rectification structures separating quaternary mixtures with exergy analysis

Vapor recompression for efficient distillation. 1. A new synthesis perspective on standard configurations

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