Distillation column targets

Dhole, V.R.; Linnhoff, B.

doi:10.1016/0098-1354(93)80043-m

Cited by 170 publications

(126 citation statements)

References 6 publications

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“…However, this limitation can be overcome during the generation of IRS curves using the pseudo-binary concept of a light and heavy key [6][7][8][9]11] that defines a practical near-MTC [7]. The invariant property of the IRS curves does not hold rigorously for multicomponent systems because the distribution of the mole fractions of the components depends on the operating reflux of the column.…”

Section: Irs Curves and Their Physical Significancementioning

confidence: 99%

“…In contrast to binary distillation, the sharpness of separation is generally limited in multicomponent reversible distillation [6] and it is impossible to device a reversible separation scheme for many practical multicomponent separations [10]. The limitations of sharpness of reversible multicomponent distillation may be overcome, for the purpose of generation of the T-H curve, by using the pseudo-binary concept of light and heavy key [6][7][8][9]11]. Dhole and Linnhoff [7] called the T-H curve of a distillation column the column grand composite curve (CGCC) and described a procedure for generating it for a simulated base-case distillation column.…”

Section: Introductionmentioning

confidence: 99%

“…The limitations of sharpness of reversible multicomponent distillation may be overcome, for the purpose of generation of the T-H curve, by using the pseudo-binary concept of light and heavy key [6][7][8][9]11]. Dhole and Linnhoff [7] called the T-H curve of a distillation column the column grand composite curve (CGCC) and described a procedure for generating it for a simulated base-case distillation column. The generation procedure inherently accounts for the inevitable losses like feed loss, pressure loss, loss due to chosen configuration, and sharp separation loss.…”

Section: Introductionmentioning

confidence: 99%

“…The T-H curve for a distillation column quantitatively address the energy saving potential for possible stand-alone modifications as well as process integration. The T-H curve for a binary distillation column at minimum thermodynamic condition (MTC) is generated by solving the coupled mass and enthalpy balances for the reversible separation scheme [5][6][7][8][9][10][11]. The MTC for distillation is defined as reversible operation of a column without any entropy generation.…”

Section: Introductionmentioning

confidence: 99%

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Effect of feed on optimal thermodynamic performance of a distillation column

Bandyopadhyay

2002

Chemical Engineering Journal

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Section: Irs Curves and Their Physical Significancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of feed on optimal thermodynamic performance of a distillation column

Bandyopadhyay

2002

Chemical Engineering Journal

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“…About a decade ago Dhole and Linnhoff, 1993, had introduced the concept of Column Grand Composite Curve (CGCC). Since then, this concept has been extended (e.g., Gadalla et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

A hierarchical approach to optimize LNG fractionation units

Alfadala

Ahmad

Warsame³

2005

Computer Aided Chemical Engineering

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The objective of this paper is to optimize the thermal performance of a fractionation unit within a liquefied natural gas (LNG) facility. Typical fractionation units in an LNG facility consisting of three distillation columns, namely de-ethanizer, de-propanizer and de-butanizer were used in this study. A hierarchical approach is developed to optimizing the system. In this approach, increasing levels of model complexity are used and various thermal targets are set and implemented. The column targeting tool available within the simulation package of Aspen Plus software was used to optimize a fractionation unit in an LNG facility. First, integrated thermal analysis was used in identifying design targets for improvements in energy consumption and efficiency. The column targeting tool is used in the design of distillation columns by setting targets to reduce utility cost, improve energy efficiency, reduce capital investment and facilitate column debottlenecking. Starting from a short-cut distillation design calculation using the DSTWU method which is based on the well-known Fenske-Underwood-Gilliland correlations, the minimum and actual reflux ratios, minimum and actual number of stages, optimum feed location and condenser and reboiler duties were estimated. These estimates were used as starting points in the rigorous fractionation column design method RADFRAC available in Aspen Plus . The column Grand Composite Curve (CGCC) for each column was generated to give an insight of the actual operation and guide the optimization process. Starting with appropriate feed placement, the CGCC will show the scope for reflux ratio modification by increasing the number of stages. Feed would be either preheated or precooled due to the availability of sharp enthalpy change in the condenser or reboiler side. Finally, the scope for a side condensing or side reboiling can be identified from the area beneath or above the CGCC pinch point.

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Pinch Analysis for Energy Optimization

Zhu

2015

Kirk-Othmer Encyclopedia of Chemical Technology

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This article describes several methods in pinch analysis for energy and process integrated optimization. First, the energy targeting method is illustrated, which is a very powerful tool for identifying energy‐saving opportunities. Second, the network pinch method is discussed, which is used for determining cost‐effective HEN modifications. Finally, the process integration method for identifying process changes is explained. It has been demonstrated through many applications that integrated energy and process improvements can achieve much more significant benefits than doing energy modifications alone.

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Distillation column targets

Cited by 170 publications

References 6 publications

Effect of feed on optimal thermodynamic performance of a distillation column

Effect of feed on optimal thermodynamic performance of a distillation column

A hierarchical approach to optimize LNG fractionation units

Pinch Analysis for Energy Optimization

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