Energy-efficient and ecologically friendly hybrid extractive distillation using a pervaporation system for azeotropic feed compositions in alcohol dehydration process

Novita, Felicia Januarlia; Lee, Hao‐Yeh; Lee, Moonyong

doi:10.1016/j.jtice.2018.05.023

Cited by 30 publications

(11 citation statements)

References 45 publications

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“…For instance, a distillation and PV hybrid system was able to save up to 86% of the total energy requirement compared to the conventional pressure swing distillation process [ 36 ]. Recent modelling study by Felicia N. et al has proven that their hybrid extractive distillation column with a PV system could save up to 25% and 41% of total annual cost and energy, respectively, in the alcohol dehydration process [ 37 ]. Another niche application is to recover alcohol straight from the its fermentation broth [ 38 , 39 ].…”

Section: Resultsmentioning

confidence: 99%

Study of Hybrid PVA/MA/TEOS Pervaporation Membrane and Evaluation of Energy Requirement for Desalination by Pervaporation

Xie

Hoang

et al. 2018

IJERPH

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Desalination by pervaporation is a membrane process that is yet to be realized for commercial application. To investigate the feasibility and viability of scaling up, a process engineering model was developed to evaluate the energy requirement based on the experimental study of a hybrid polyvinyl alcohol/maleic acid/tetraethyl orthosilicate (PVA/MA/TEOS) Pervaporation Membrane. The energy consumption includes the external heating and cooling required for the feed and permeate streams, as well as the electrical power associated with pumps for re-circulating feed and maintaining vacuum. The thermal energy requirement is significant (e.g., up to 2609 MJ/m3 of thermal energy) and is required to maintain the feed stream at 65 °C in recirculation mode. The electrical energy requirement is very small (<0.2 kWh/m3 of required at 65 °C feed temperature at steady state) with the vacuum pump contributing to the majority of the electrical energy. The energy required for the pervaporation process was also compared to other desalination processes such as Reverse Osmosis (RO), Multi-stage Flash (MSF), and Multiple Effect Distillation (MED). The electrical energy requirement for pervaporation is the lowest among these desalination technologies. However, the thermal energy needed for pervaporation is significant. Pervaporation may be attractive when the process is integrated with waste heat and heat recovery option and used in niche applications such as RO brine concentration or salt recovery.

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Section: Resultsmentioning

confidence: 99%

Study of Hybrid PVA/MA/TEOS Pervaporation Membrane and Evaluation of Energy Requirement for Desalination by Pervaporation

Xie

Hoang

et al. 2018

IJERPH

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“…114 To maximize the benefits of different separation methods, pervaporation technology can be integrated with distillation, to address the problems of high energy consumption and low efficiency often associated with the distillation process while overcoming the instability of pervaporation technology. 115 Novita et al 116 studied the dehydration process of ethanol, isopropyl alcohol and tert-butanol using a highly selective ED− pervaporation coupled process. They chose glycerol as the entrainer to separate the alcohol−water azeotropic system.…”

Section: ■ Extractive Distillation Process Designmentioning

confidence: 99%

Design and Multiple Performance Evaluation of Green Sustainable Process for Azeotropes Separation via Extractive Distillation

Zhong,

Cheng,

Dai

et al. 2023

ACS Sustainable Chem. Eng.

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Multicomponent liquid mixtures, particularly azeotropes, are extensively utilized in the chemical, petroleum, pharmaceutical, and other processing industries. Energy-saving and efficient separation of azeotropes holds significant value for the design and development of sustainable industrial processes. Extractive distillation (ED) has consistently played a pivotal role in azeotrope separation. We offer a broad and comprehensive review that encompasses recent progress in multiple aspects of ED, including the screening of entrainers, process design, enhancement schemes, dynamic control strategies, and environmental assessment. Initially, we delved into the application of quantum chemistry calculations and molecular dynamics simulation for screening suitable entrainers. We then elucidate the design principles and forms of two distinct types of ED processes. Subsequently, we explore the intensification mechanisms of the ED process through coupling mechanisms, such as heat integration and the combination of ED with other distillation processes. We also summarize the recent improvements in dynamic control strategies for various ED processes. Lastly, we evaluate various aspects of ED from the perspectives of environmental impact, economic viability, and exergy analysis. This study investigates the challenges, prospects, and emerging trends of ED technology for the separation of multicomponent azeotropes.

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“…7,8 Extractive distillation(ED) is a typical technology for separating azeotropic compounds. 9,10 However, the remixing effect of intermediate components in multicomponent mixtures results in high energy consumption for the extractive distillation process. 6,11 Therefore, it is urgent to develop an alternative process with more energy competitiveness.…”

Section: Introductionmentioning

confidence: 99%

Comparison of different extractive distillation processes for chloroform/n‐hexane separation: design and control

Zeng

Jianting²,

Zhu

et al. 2022

J of Chemical Tech & Biotech

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Background When extracting total glycosides from Panax notoginseng, a waste liquid containing chloroform and n‐hexane will be produced. These waste liquids are not separated and recycled in time, which will not only waste resources but also cause environmental pollution. Chloroform and n‐hexane form an azeotrope which cannot be separated by ordinary distillation methods. This study proposes three extractive distillation processes to separate the chloroform/n‐hexane azeotrope: conventional extractive distillation (ED), side‐stream extractive distillation (SSED) and extractive dividing wall column (EDWC). The total annual cost (TAC) and carbon dioxide (CO2) emissions of the three options were compared, and the optimal process was selected. Furthermore, this research developed dynamic control of the optimal process. Results Compared with ED, from the perspective of economic indicators, the SSED process showed 18.9% reduction in TAC yet the EDWC process showed 33.2% reduction in TAC. In terms of CO2 emission indicators, the EDWC process also is more advantageous. Three control structures thus were developed for EDWC: applying ±5% or ±10% feed flow disturbance, and feed composition disturbance. The results show that CS3 with temperature composition cascade control structure can perfectly control all disturbances. Conclusion This paper designs an economical, environmentally friendly and controllable chloroform/n‐hexane azeotropic separation process, which can provide a reference for the industrial application of chloroform/n‐hexane separation. © 2022 Society of Chemical Industry (SCI).

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Energy-efficient and ecologically friendly hybrid extractive distillation using a pervaporation system for azeotropic feed compositions in alcohol dehydration process

Cited by 30 publications

References 45 publications

Study of Hybrid PVA/MA/TEOS Pervaporation Membrane and Evaluation of Energy Requirement for Desalination by Pervaporation

Study of Hybrid PVA/MA/TEOS Pervaporation Membrane and Evaluation of Energy Requirement for Desalination by Pervaporation

Design and Multiple Performance Evaluation of Green Sustainable Process for Azeotropes Separation via Extractive Distillation

Comparison of different extractive distillation processes for chloroform/n‐hexane separation: design and control

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