Economic feasibility of heat pumps in distillation to reduce energy use

Díez, Eduardo; Langston, Paul; Ovejero, Gabriel; Romero, M.D.

doi:10.1016/j.applthermaleng.2008.06.013

Cited by 118 publications

(39 citation statements)

References 14 publications

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“…It is used for about 95% of all fluid separation in the chemical industry. 1 Diez et al 2 reported that 60% of energy used by the chemical industry was for distillation. It is surprising that the overall thermal efficiency of a conventional distillation is around 5-20%.…”

Section: Introductionmentioning

confidence: 99%

“…Most popular techniques of thermal coupling are internal energy integration 4 and heat pumping. 2 In industrial practice, mechanical and absorption heat pumps are frequently used. In the former, the overhead vapor is compressed to a higher pressure and used to heat the bottom liquid in the reboiler, or the bottom liquid is flashed in a valve and used to condense the overhead vapor.…”

Section: Introductionmentioning

confidence: 99%

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Heat pump assisted reactive distillation: Wide boiling mixture

Jana¹,

Mane²

2011

AIChE Journal

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat pump assisted reactive distillation: Wide boiling mixture

Jana¹,

Mane²

2011

AIChE Journal

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“…However, due to improper utilization of heat, the energy consumption is considerable. Thermal efficiency of the conventional distillation is only around 5-20% [1], and about 60% of energy used by the chemical industry is for distillation [2]. As a result the implementation of energy integration strategy in distillation would provide a great benefit.…”

Section: Introductionmentioning

confidence: 99%

Heat pump assisted reactive and azeotropic distillations in dividing wall columns

Liu

Zhai

et al. 2015

Chemical Engineering and Processing: Process Intensification

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“…Another way is to take measures to improve the thermodynamic efficiency of distillation system such as adding intermediate condensers or reboilers, adding side stream, and taking thermal coupling techniques, i.e., multi-effect distillation, heat pump distillation and internal thermally coupled distillation, etc. [9][10][11][12][13][14][15][16][17]. Recently, Li et al [18] developed a new different pressure thermally coupled distillation technology widely used in distillation process, in which a conventional distillation column was divided into two columns, one conventional fractionator as rectifying section and the other vacuum one as stripping section.…”

Section: Introductionmentioning

confidence: 99%

Simulation and optimization of different pressure thermally coupled distillation for separating a close-boiling mixture of n-butanol and iso-butanol

et al. 2017

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Substantial quantities of energy are required in conventional distillation columns applied in high-purity separation of close-boiling mixtures. To achieve energy saving of distillation, a novel different pressure thermally coupled distillation (DPTCD) was proposed for separating the close-boiling mixture of n-butanol and iso-butanol. Both this intensified energy integration technique and two other processes, namely conventional distillation (CD) and vapor recompression column (VRC), were simulated in process simulator Aspen Plus. The optimization was carried out to determine the optimal values of design and operating variables on the basis of minimizing energy consumption. Subsequently, the energy saving and economic efficiency of the DPTCD scheme were evaluated through the comparison with the other two processes. The results showed that, compared to the CD and VRC processes, the energy consumption of DPTCD process was decreased by 65.21 and 15.79%, respectively, and the total annual cost (TAC) of DPTCD process can be reduced by 33.75 and 10.46%. It demonstrated that DPTCD scheme was the most promising alternative to reduce the total energy consumption and TAC with high purity (99.1 wt%) n-butanol and iso-butanol products among these separation processes.

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Economic feasibility of heat pumps in distillation to reduce energy use

Cited by 118 publications

References 14 publications

Heat pump assisted reactive distillation: Wide boiling mixture

Heat pump assisted reactive distillation: Wide boiling mixture

Heat pump assisted reactive and azeotropic distillations in dividing wall columns

Simulation and optimization of different pressure thermally coupled distillation for separating a close-boiling mixture of n-butanol and iso-butanol

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