A new approach to the design of internally heat-integrated tray distillation columns

Gadalla, Mamdouh A.; Olujić, Žarko; Rijke, A. de; Jansens, P.J.

doi:10.1016/s1570-7946(05)80256-1

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…Here, the chosen minimum temperature approach between the rectifying section (hot) and the stripping section (cold) profiles is 3 °C (that is, Δ T min = 3 °C). In the HIDiC scheme, an equal amount of heat can be transferred across all of the heat integrated stages or the amount of heat transfer can be proportional to the temperature difference between the stages. , The latter approach is a more practical one because it is equivalent to having equal heat transfer areas across all of the heat integrated stages under the assumption of a constant overall heat transfer coefficient. In this article, the latter approach of heat transfer is used in all of the HIDiC simulations.…”

Section: Hidic Versus Heat Pump For Symmetrical Temperature Profilesmentioning

confidence: 99%

Energy Efficiency Limitations of the Conventional Heat Integrated Distillation Column (HIDiC) Configuration for Binary Distillation

Shenvi

Herron

Agrawal

2010

Ind. Eng. Chem. Res.

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In the recent literature, a typical heat integrated distillation column (HIDiC), with heat integration at multiple locations between the rectifying and stripping sections, is often claimed to be more energy efficient than a single binary distillation column. However, we find that there are many binary feed separations where HIDiC is less energy efficient than simple heat pump schemes using only one or two heat transfer locations. Furthermore, we show that the energy efficiency of HIDiC cannot be solely decided based on the feed composition or product purities. A better performance indicator is the temperature profile along the height of the rectifying section relative to the corresponding temperature profile in the stripping section. On the basis of the analysis of these temperature profiles, we suggest a novel method to reduce heat transfer locations between the two distillation sections of HIDiC with negligible, if any, negative impact on the overall energy efficiency. † This article is dedicated to Professor Stanley I. Sandler, who has been a great teacher and a mentor to R.A.

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Section: Hidic Versus Heat Pump For Symmetrical Temperature Profilesmentioning

confidence: 99%

Energy Efficiency Limitations of the Conventional Heat Integrated Distillation Column (HIDiC) Configuration for Binary Distillation

Shenvi

Herron

Agrawal

2010

Ind. Eng. Chem. Res.

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“…Two typical heat distribution schemes, namely, uniform heat-transfer area and uniform heat distribution, were usually used in simulation studies . The configuration in which the stripping section stages are thermally connected with the same number of stages in the upper part of the rectifying section with uniform heat distribution was employed in the present work, as this was confirmed by previous studies ,,, to be the most energy-efficient scheme for a propylene–propane splitter. When altering the compression ratio in HIDiC cases (including the simplified HIDiC), the operating pressure of the rectifying section is kept unchanged, whereas those of the stripping section and feed are adjusted, with the feed thermal condition remaining constant.…”

Section: Configurations Of Various Schemes To Be Consideredmentioning

confidence: 99%

Comparison between Different Configurations of Internally and Externally Heat-Integrated Distillation by Numerical Simulation

Chen

Yuan

Liu

et al. 2013

Ind. Eng. Chem. Res.

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The internally heat-integrated distillation column (HIDiC) is often compared with heat-pump-assisted distillation columns and claimed to be more energy efficient. Recently, the idea of simplifying the HIDiC by several external heat exchangers has come into favor and been thought to be a more practical configuration with greatly reduced capital costs. To investigate the energy and economic performances of heat-pump-assisted distillation along with the HIDiC and simplified HIDiC, comparisons based on numerical simulation were made in the present work. A propylene–propane splitter was chosen for the comparison. Compression ratios and total numbers of stages were optimized to achieve an optimal configuration in terms of total annualized costs for each scheme before comparison with others. For the HIDiC and its simplifications, the impacts of different heat distribution patterns were also considered. It was found that the results depend strongly on the basis selected for comparison, and some discussions and remarks are also presented.

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“…The CO 2 emissions of the process were calculated according to the method described by Gadalla et al according to Eq. :

true C O_{2_{normalem}} = \frac{A_{normalfuel}}{NHV} (\frac{C %}{100}) θ \times 3600

…”

Section: Synthesis Of Etbementioning

confidence: 99%

Optimization of Reactive Dividing‐Wall Distillation Column for Ethyl t‐Butyl Ether Synthesis

Kaur

Sangal

2018

Chem Eng & Technol

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Ethyl t‐butyl ether (ETBE) was synthesized via reaction of ethanol and isobutene by means of a reactive dividing‐wall distillation column (RDWC). The RDWC was simulated using the RADFRAC model of Aspen Plus. Multi‐response optimization by response surface methodology (RSM) with desirability function approach was applied for maximizing product purities and minimizing energy requirements and CO2 emissions simultaneously with a constraint that the difference in pressure drop across the dividing wall should be zero. The prediction from the RSM optimization agrees well with the simulation. The optimized RDWC provided an excellent purity of 99.99 mol % of the product ETBE with about one‐third reduction in energy requirements and CO2 emissions as compared to reactive distillation.

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A new approach to the design of internally heat-integrated tray distillation columns

Cited by 3 publications

References 2 publications

Energy Efficiency Limitations of the Conventional Heat Integrated Distillation Column (HIDiC) Configuration for Binary Distillation

Energy Efficiency Limitations of the Conventional Heat Integrated Distillation Column (HIDiC) Configuration for Binary Distillation

Comparison between Different Configurations of Internally and Externally Heat-Integrated Distillation by Numerical Simulation

Optimization of Reactive Dividing‐Wall Distillation Column for Ethyl t‐Butyl Ether Synthesis

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