Investigation of an energy-saving double-thermally coupled extractive distillation for separating ternary system benzene/toluene/cyclohexane

Yang, Ao; Yang, Su; Chien, I‐Lung; Jin, Saimeng; Yan, Chenglei; Wei, Shun’an; Shen, Weifeng

doi:10.1016/j.energy.2019.07.086

Cited by 91 publications

(20 citation statements)

References 51 publications

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“…It is difficult to separate the azeotropic mixture by an ordinary distillation method to obtain high-purity components. Compared with pressure swing distillation, azeotropic distillation, membrane separation, and extractive distillation, , liquid–liquid extraction (LLE) is an effective method to separate azeotropes because it can be carried out under environmental conditions, which can greatly reduce energy consumption and environmental impact. Therefore, it is very important to choose an efficient, suitable, and highly selective solvent to ensure an economic operation. − …”

Section: Introductionmentioning

confidence: 99%

Molecular Mechanism and Extraction Performance Evaluation for Separation of Methanol and n-Hexane via Ionic Liquids as Extractant

Zhang

Chen

Shen

et al. 2020

ACS Sustainable Chem. Eng.

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Biodiesel is considered as one of the best resources to replace fossil fuels. There are a lot of mixtures of methanol and hexane in the process of biodiesel production. In this study, a green solvent ionic liquid extraction is used to separate methanol and n-hexane. The molecular dynamics method is used to study the extraction mechanism of methanol and n-hexane by ionic liquid. The extraction efficiency predicted by molecular dynamics simulation is compared with liquid–liquid extraction experimental values. The deviation between the experimental data and the simulation data is less than 8%, which shows that they have good consistency. The interaction energy, radial and spatial distribution functions, and self-diffusion coefficients are calculated based on the molecular dynamics simulation results. At the same time, anions play a vital role in the extraction process. A method for separating methanol and recovering ionic liquid using Aspen plus is proposed. The optimum operating parameters are determined. The recoveries of ionic liquid and methanol were 99.32% and 94.11%, respectively. The minimum total annual cost of the IL extraction process is 17.31% lower than that of traditional extraction process. At the same time, environmental analysis is performed. Global warming potential and eutrophic potential of the new process are 86.1% and 85% lower than those of the traditional process, respectively. The new process has good sustainable development advantages. This study provides theoretical guidance for the recycling and comprehensive utilization of methanol and n-hexane and provides a new method for the sustainable development of green chemicals.

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Section: Introductionmentioning

confidence: 99%

Molecular Mechanism and Extraction Performance Evaluation for Separation of Methanol and n-Hexane via Ionic Liquids as Extractant

Zhang

Chen

Shen

et al. 2020

ACS Sustainable Chem. Eng.

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“…The working fluid of the classical Rankine cycle is steam. However, ORCs use a wide variety of organic-based working fluids [33,34]. The organic-based working fluids have many superiorities over steam such as low boiling temperatures, low specific heats, etc.…”

Section: Description Of the Organic Rankine Cycle (Orc)mentioning

confidence: 99%

Deep neural network approach to estimation of power production for an organic Rankine cycle system

Mert

Bilgiç

Yağlı

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…The ORC units are the most convenient system to recover the heat of low and medium temperature heat sources to electricity. However, in order to evaluate the best performing ORC, the selection of working fluids is essential [43,44]. There are many fluid selection criteria, such as thermodynamic properties, environmental effect and price [45,46].…”

Section: Working Fluids Of the Orcmentioning

confidence: 99%

“…The thermodynamic properties and types of the selected working fluid[43,[49][50][51][52][53][54][55][56].…”

mentioning

confidence: 99%

Parametric Optimisation of an ORC in a Wood Chipboard Production Facility to Recover Waste Heat Produced from the Drying and Steam Production Process

Koç

2019

Energies

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The wastes in wood industries (waste chips) are commonly used as fuel for burners to produce steam and to use the remaining heat in the drying process. However, in spite of that, there is a considerable amount of heat evaluated from the burn of waste chips still released to the atmosphere without use. Therefore, in the present study, a cogeneration cycle design by used of ORC was designed and parametrically optimised for six organic working fluids (acetone, ethanol, R11, RE245fa2, R365mfc and R601a). During the ORC optimisation, the ORC turbine inlet temperature was changed from the saturated steam temperature of the fluid to the maximum temperature of the fluid. The ORC turbine inlet pressure was increased from 7.5 bar to the critical pressure of the fluid. As a result of the study, the maximum net power, net thermal efficiency and exergy efficiency of the ORC were found as 453.91 kW, 30.01% and 67.56% at 340 °C and 62.5 bar from the ORC with ethanol. This means that almost 30% of the waste heat could be recovered by use of the ORC with ethanol. By using the designed cogeneration system, it was calculated that the thermal efficiency of the system can be increased up to 74.01%.

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Investigation of an energy-saving double-thermally coupled extractive distillation for separating ternary system benzene/toluene/cyclohexane

Cited by 91 publications

References 51 publications

Molecular Mechanism and Extraction Performance Evaluation for Separation of Methanol and n-Hexane via Ionic Liquids as Extractant

Molecular Mechanism and Extraction Performance Evaluation for Separation of Methanol and n-Hexane via Ionic Liquids as Extractant

Deep neural network approach to estimation of power production for an organic Rankine cycle system

Parametric Optimisation of an ORC in a Wood Chipboard Production Facility to Recover Waste Heat Produced from the Drying and Steam Production Process

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