LAPSE:2023.9537
Published Article
LAPSE:2023.9537
A Comparison of the Exergy Efficiencies of Various Heat-Integrated Distillation Columns
February 27, 2023
Abstract
Distillation has relatively low thermodynamic efficiency, so it is a prime target for process intensification studies. The current research aims to study exergy losses in various heat-integrated distillation columns. A conventional industrial-scale i-butane/n-butane fractionator has been selected as a case study for the comparison of the performances of various heat-integrated designs. The Aspen Plus® process simulator is used to perform steady-state simulations and exergy analyses of the conventional distillation column (CDC), internally heat-integrated distillation column (iHIDiC), externally heat-integrated double distillation columns (EHIDDiC), and vapor recompression (VRC) systems. The results of these exergy analyses show that a modified VRC system (ηE = 10.69%) is the most efficient design for this separation. The exergy efficiency of the conventional VRC system is the same as that of the CDC (ηE = 9.27%). The EHIDDiC system (ηE = 9.77%) is somewhat better than the CDC, whereas iHIDiC shows poor exergy efficiency (ηE = 8.09%), even lower than the CDC.
Distillation has relatively low thermodynamic efficiency, so it is a prime target for process intensification studies. The current research aims to study exergy losses in various heat-integrated distillation columns. A conventional industrial-scale i-butane/n-butane fractionator has been selected as a case study for the comparison of the performances of various heat-integrated designs. The Aspen Plus® process simulator is used to perform steady-state simulations and exergy analyses of the conventional distillation column (CDC), internally heat-integrated distillation column (iHIDiC), externally heat-integrated double distillation columns (EHIDDiC), and vapor recompression (VRC) systems. The results of these exergy analyses show that a modified VRC system (ηE = 10.69%) is the most efficient design for this separation. The exergy efficiency of the conventional VRC system is the same as that of the CDC (ηE = 9.27%). The EHIDDiC system (ηE = 9.77%) is somewhat better than the CDC, whereas iHIDiC shows poor exergy efficiency (ηE = 8.09%), even lower than the CDC.
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Keywords
Exergy, heat integrated distillation column, Simulation
Subject
Suggested Citation
Javed A, Hassan A, Babar M, Azhar U, Riaz A, Mujahid R, Ahmad T, Mubashir M, Lim HR, Show PL, Khoo KS. A Comparison of the Exergy Efficiencies of Various Heat-Integrated Distillation Columns. (2023). LAPSE:2023.9537
Author Affiliations
Javed A: School of Chemical Engineering, University of Engineering and Technology, Lahore 540000, Pakistan
Hassan A: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan
Babar M: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan [ORCID]
Azhar U: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan
Riaz A: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan
Mujahid R: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan [ORCID]
Ahmad T: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan
Mubashir M: Department of Petroleum Engineering, School of Engineering, Asia Pacific University of Technology and Innovation, Kuala Lumpur 57000, Malaysia
Lim HR: Department of Chemical and Environmental Engineering, Faculty Science and Engineering, University of Nottingham Malaysia, Semenyih 43500, Malaysia [ORCID]
Show PL: Department of Chemical and Environmental Engineering, Faculty Science and Engineering, University of Nottingham Malaysia, Semenyih 43500, Malaysia; Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protec [ORCID]
Khoo KS: Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan [ORCID]
Hassan A: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan
Babar M: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan [ORCID]
Azhar U: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan
Riaz A: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan
Mujahid R: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan [ORCID]
Ahmad T: Chemical Engineering Department, Khwaja Fareed University of Engineering and Information Technology, Rahimyar Khan 64200, Pakistan
Mubashir M: Department of Petroleum Engineering, School of Engineering, Asia Pacific University of Technology and Innovation, Kuala Lumpur 57000, Malaysia
Lim HR: Department of Chemical and Environmental Engineering, Faculty Science and Engineering, University of Nottingham Malaysia, Semenyih 43500, Malaysia [ORCID]
Show PL: Department of Chemical and Environmental Engineering, Faculty Science and Engineering, University of Nottingham Malaysia, Semenyih 43500, Malaysia; Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protec [ORCID]
Khoo KS: Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan [ORCID]
Journal Name
Energies
Volume
15
Issue
18
First Page
6498
Year
2022
Publication Date
2022-09-06
ISSN
1996-1073
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PII: en15186498, Publication Type: Journal Article
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LAPSE:2023.9537
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https://doi.org/10.3390/en15186498
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Feb 27, 2023
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