Reducing CO2 emissions of internally heat-integrated distillation columns for separation of close boiling mixtures

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

doi:10.1016/j.energy.2005.10.029

Cited by 89 publications

(38 citation statements)

References 11 publications

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“…Table shows the specific calculation procedure for the economic evaluation . In addition, CO 2 emissions – an important evaluation indicator for global warming – can be calculated for a given amount of fuel burnt through the same expression used in the work of Gadalla et al …”

Section: Design and Optimization Of Separation Sequencesmentioning

confidence: 99%

Comparison of extractive distillation separation sequences for acetonitrile/methanol/benzene multi‐azeotropic mixtures

Wang

Guang

et al. 2018

J of Chemical Tech & Biotech

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Background The extractive distillation‐based separation of a multi‐azeotropic mixture has several optional solvents and schemes. The screen of a suitable solvent was performed and diverse extractive distillation sequences were compared for separating the specified mixture of acetonitrile/methanol/benzene. Result As a solvent breaking all binary azeotropes, chlorobenzene was selected over aniline on the basis vapor–liquid equilibrium diagrams and infinite dilution factors. Four separation sequences were optimized by the sequential iterative procedure on the basis of minimal total annual cost (TAC), and CO2 emissions were calculated. Among four sequences, sequence III, composed of two extractive distillation columns and one solvent recovery column, is the best scheme from environmental and economic viewpoints. Simple partial heat integration was further implemented and can save 20.08% and 8.86% in terms of energy cost and TAC. Conclusion The results demonstrate that the separation of acetonitrile/methanol/benzene is fully achievable using common extractive distillation with chlorobenzene as solvent. Moreover, there is a trade‐off between heat transfer in the reboiler‐condenser and corresponding energy consumption variations due to pressure changes when considering heat integration. © 2018 Society of Chemical Industry

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Section: Design and Optimization Of Separation Sequencesmentioning

confidence: 99%

Comparison of extractive distillation separation sequences for acetonitrile/methanol/benzene multi‐azeotropic mixtures

Wang

Guang

et al. 2018

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

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“…When the fuel (light and heavy fuel oils, natural gas, or coal) is combusted, the following stoichiometric equation can be derived :

true {normalC}_{α} {normalH}_{β} + (α + \frac{β}{4}) {normalO}_{2} \to α normalC {normalO}_{2} + \frac{β}{2} {normalH}_{2} normalO

…”

Section: Calculationsmentioning

confidence: 99%

Analysis of CO₂ Emission and Economic Feasibility for a Heat‐Integrated Air Separation System

et al. 2018

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Cryogenic air separation is a high‐energy consumption process and contributes significantly to greenhouse gas emissions. Reduction potentials of the CO2 emissions for both the full‐tower heat‐integrated air separation columns (F‐HIASC) and the top‐tower heat‐integrated air separation columns (T‐HIASC) are investigated. The optimization models of the minimum CO2 emissions are further proposed. The unit CO2 emissions of F‐HIASC and T‐HIASC can be decreased significantly compared to the conventional air separation columns (CASC). Furthermore, the capital cost and total annual cost are analyzed so as to evaluate properly the economic feasibility of HIASC. The results demonstrate that the total annual costs of F‐HIASC and T‐HIASC are much lower than that of CASC.

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“…CO 2 emission is also an important indicator for evaluating the environmental impact of the optimal design. It can be calculated for a given amount of burnt fuel through the expressions presented in the literature . A detailed calculation procedure is shown as follows:

[{CO}_{2}] emission = (\frac{{italicAmt}_{Fuel}}{NHV}) \times (\frac{C %}{100}) α

where α is the molar mass ratio of CO 2 and C, 3.67; NHV is the net heating value and C % is the carbon content of a specific fuel.…”

Section: Design Basismentioning

confidence: 99%

Hybrid reactive distillation using polyoctylmethylsiloxane membrane for isopentyl acetate production from mixed PVA by products

Wang

Guang

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND The transesterification of methyl acetate and isoamyl alcohol catalyzed by ionic liquids is a new environment‐friendly method for isopentyl acetate (iso‐AmAc) production, and also appropriate for the recovery of polyvinyl alcohol (PVA) byproducts. Therefore, it is of great significance for iso‐AmAc production from PVA byproducts to explore alternative processes with the goal of improving the conversion of the chemical equilibrium reaction and energy efficiency, including reactive distillation (RD), dividing‐wall reactive distillation (RDWC) and pervaporation (PV)‐based hybrid reactive distillation. RESULT This article proposed four novel reactive hybrid processes with feedstock of mixed PVA byproducts and made a comparison with two conventional processes of RD and RDWC in terms of the minimum total annual cost (TAC) and CO2 emissions. The results revealed that the RDWC‐PV can give a 35.61% saving in TAC and a 40.27% reduction in CO2 emissions compared with the RD, and the other three RD‐PV hybrid processes have less CO2 emissions and equivalent TAC compared with the RDWC. CONCLUSION In summary, all hybrid processes proposed were more energy‐saving and economical than the conventional RD, especially the RDWC‐PV, due to synergistic advantages of various process intensification methods. © 2018 Society of Chemical Industry

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Reducing CO2 emissions of internally heat-integrated distillation columns for separation of close boiling mixtures

Cited by 89 publications

References 11 publications

Comparison of extractive distillation separation sequences for acetonitrile/methanol/benzene multi‐azeotropic mixtures

Comparison of extractive distillation separation sequences for acetonitrile/methanol/benzene multi‐azeotropic mixtures

Analysis of CO₂ Emission and Economic Feasibility for a Heat‐Integrated Air Separation System

Hybrid reactive distillation using polyoctylmethylsiloxane membrane for isopentyl acetate production from mixed PVA by products

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Reducing CO2 emissions of internally heat-integrated distillation columns for separation of close boiling mixtures

Cited by 89 publications

References 11 publications

Comparison of extractive distillation separation sequences for acetonitrile/methanol/benzene multi‐azeotropic mixtures

Comparison of extractive distillation separation sequences for acetonitrile/methanol/benzene multi‐azeotropic mixtures

Analysis of CO2 Emission and Economic Feasibility for a Heat‐Integrated Air Separation System

Hybrid reactive distillation using polyoctylmethylsiloxane membrane for isopentyl acetate production from mixed PVA by products

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Analysis of CO₂ Emission and Economic Feasibility for a Heat‐Integrated Air Separation System