Misconceptions about efficiency and maturity of distillation

Gooty, Radhakrishna Tumbalam

doi:10.1002/aic.16294

Cited by 25 publications

(17 citation statements)

References 53 publications

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“…Such a design could be particularly useful for water‐lean solvents which cannot be directly contacted with large quantities of steam. Heat exchange packings could also be used to expand the design space available for distillation processes, which are responsible for 90–95% of industrial liquid separations, and which typically operate well below the thermodynamic optimum 66 . Applications to solvent extraction columns and multiphase chemical reactors are also possible.…”

Section: Discussionmentioning

confidence: 99%

Advanced absorber heat integration via heat exchange packings

et al. 2021

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A rate‐based model of an absorption column was developed and used to analyze several intercooling strategies utilizing “heat exchange packings.” These packings are capable of removing heat from the column and transferring it to a cooling fluid within the packing. For absorption of CO2 into aqueous monoethanolamine under industrial conditions, intercooling via heat exchange packings placed along 10–20% of the column could reduce the column height by ∼15%. The height of these columns was close to the minimum theoretical value, calculated by numerically optimizing the temperature profile. Effective intercooling could also be achieved by using the cool, rich solvent as the cooling fluid. This reduces the cooling load and facilitates recovery of waste heat. Heat exchange packings could also be used to redistribute heat within the column, reducing the column height with no net cooling load. However, this approach requires larger heat transfer coefficients than have been experimentally observed.

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Section: Discussionmentioning

confidence: 99%

Advanced absorber heat integration via heat exchange packings

et al. 2021

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“…However, the energy required in distillation is not necessarily proportional to the reboiler duty and distillation can be much more efficient than intuition seems suggest. Conversely, for many applications, the high efficiency of distillation makes it challenging for alternatives to even achieve the same energy as that of distillation (Agrawal and Tumbalam Gooty, 2020). In this work we will show how the systematic implementation of heat integration alternatives can substantially increase the energy efficiency in distillation.…”

Section: Introductionmentioning

confidence: 95%

Efficient Energy Integration and Design of Distillation Separation Sequences

Caballero

Javaloyes

2021

31st European Symposium on Computer Aided Process Engineering

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“…Many recent studies have portrayed distillation as being inherently energy‐intensive when compared to other separation processes such as membranes 5–9 . Furthermore, there seems to be a general misconception about the efficiency and maturity of the distillation processes 10,11 . Past studies have identified the operating conditions under which a distillation process is either energy efficient or inefficient 12–14 .…”

Section: Introductionmentioning

confidence: 99%

“…Second, there are numerous strategies to manage the heat needed in a binary distillation, and one must carefully evaluate the entire space of options to truly identify the most energy-efficient approach. 10,11,23 Third, distillation columns operate on the basis of heat supplied in their reboilers, while membranes operate using work energy through pumps and compressors.…”

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confidence: 99%

Which separation scenarios are advantageous for membranes or distillations?

Velasco

Tawarmalani

2022

AIChE Journal

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We systematically analyze power requirements of membrane and distillation processes for binary mixtures where the desired product component is more permeable and also more volatile. We first derive a shortcut method to compare the efficiency of heat pump and steam-driven distillations. Then, power requirements of heat pump distillation and membrane separation are discussed. Distillation generally requires lower power when either high component recoveries are needed (at all tested product purities), or high purity product streams with modest recoveries are needed. For high purity products at modest recoveries, membranes have a potential to provide energy benefits for highly enriched feeds, especially those composed of close boiling components. Additionally, when feed concentration is moderate to high and product recovery and purity are modest, membranes are likely to show efficiency gain. For the advantageous distillation scenarios studied, the power was generally lower than the membranes by a factor of two to seven.

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Misconceptions about efficiency and maturity of distillation

Cited by 25 publications

References 53 publications

Advanced absorber heat integration via heat exchange packings

Advanced absorber heat integration via heat exchange packings

Efficient Energy Integration and Design of Distillation Separation Sequences

Which separation scenarios are advantageous for membranes or distillations?

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