Dehydration of diethylene glycol using a vacuum membrane distillation process

Chen, Tai Hsiang; Huang, Yao-Hui

doi:10.1016/j.jtice.2017.02.028

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…Nevertheless, MD has been successfully implemented in other applications. For example, references of the employment of MD for the dehydration of different solutions, such as aloe vera juice [13], aqueous solutions of glycerol [14] or diethylene glycol [15], can be found in the bibliography. More specifically, SGMD has been applied for the recovery of volatile chemicals like aroma compounds, [16] but examples of its application to the dehydration of glycerol [17] and triethylene glycol [18] have been published as well.…”

Section: Thickness Porositymentioning

confidence: 99%

Concentration of 1,3-dimethyl-2-imidazolidinone in Aqueous Solutions by Sweeping Gas Membrane Distillation: From Bench to Industrial Scale

et al. 2019

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Sweeping gas membrane distillation (SGMD) is a useful option for dehydration of aqueous solvent solutions. This study investigated the technical viability and competitiveness of the use of SGMD to concentrate aqueous solutions of 1,3-dimethyl-2-imidazolidinone (DMI), a dipolar aprotic solvent. The concentration from 30% to 50% of aqueous DMI solutions was attained in a bench installation with Liqui-Cel SuperPhobic® hollow-fiber membranes. The selected membranes resulted in low vapor flux (below 0.15 kg/h·m2) but were also effective for minimization of DMI losses through the membranes, since these losses were maintained below 1% of the evaporated water flux. This fact implied that more than 99.2% of the DMI fed to the system was recovered in the produced concentrated solution. The influence of temperature and flowrate of the feed and sweep gas streams was analyzed to develop simple empirical models that represented the vapor permeation and DMI losses through the hollow-fiber membranes. The proposed models were successfully applied to the scaling-up of the process with a preliminary multi-objective optimization of the process based on the simultaneous minimization of the total membrane area, the heat requirement and the air consumption. Maximal feed temperature and air flowrate (and the corresponding high operation costs) were optimal conditions, but the excessive membrane area required implied an uncompetitive alternative for direct industrial application.

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Section: Thickness Porositymentioning

confidence: 99%

Concentration of 1,3-dimethyl-2-imidazolidinone in Aqueous Solutions by Sweeping Gas Membrane Distillation: From Bench to Industrial Scale

et al. 2019

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“…This is a cost‐effective method for the production of fertilizer, and thus contributes to the concept of water‐food nexus. Several studies have also shown the separation and concentration of minerals such as hydrochloric acid (HCl) in an HCl/H 2 SO 4 (sulphuric acid) mixed system, ionic liquids l ‐lysine‐HCl syrup, extracts, and juices as well as the removal of other contaminants in the presence of organic foulants using commercial and nano‐enhanced membranes in MD . Whereas toxic metals (e.g.…”

Section: Applications Of MD Processesmentioning

confidence: 99%

“…Several studies have also shown the separation and concentration of minerals such as hydrochloric acid (HCl) in an HCl/H 2 SO 4 (sulphuric acid) mixed system, ionic liquids L-lysine-HCl syrup, extracts, and juices as well as the removal of other contaminants in the presence of organic foulants using commercial and nano-enhanced membranes in MD. [139][140][141] Whereas toxic metals (e.g. boron) and organic dyes are removed from water at a 50% efficiency in microfiltration (MF) and forward osmosis (FO), 99% removal efficiencies have been achieved in nano-enhanced MD.…”

Section: Applications Of MD Processesmentioning

confidence: 99%

A review of nanoparticle‐enhanced membrane distillation membranes: membrane synthesis and applications in water treatment

Nthunya

Gutierrez

Derese

et al. 2019

J of Chemical Tech & Biotech

118

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Membrane distillation (MD) is a thermally driven process that uses low‐grade energy to operate and has been extensively explored as an alternative cost‐effective and efficient water treatment process compared to conventional membrane processes. MD membranes are synthesized from hydrophobic polymers, e.g. polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) or polypropylene (PP), using various methods including phase inversion and electrospinning techniques. Recent literature on MD membranes clearly shows their important role in surface water/wastewater treatment and seawater desalination. Modification of MD membranes with nanoscale materials significantly improves their performance, preventing wetting and fouling. This review presents a critical assessment of the progress on the use of nanomaterials for the modification of MD membranes. The techniques commonly used to synthesize MD membranes, the modifications that have been adopted for the incorporation of nanomaterials onto membranes, and the unique properties these nanomaterials impart on the membranes are discussed. The use of modified membranes in different MD configurations and their application in groundwater, surface water, wastewater, brackish water and seawater treatment is reviewed. Finally, cost implications, commercial viability, environmental sustainability, and future prospects of MD are also discussed to elucidate promising approaches for a future and successful implementation of MD at an industrial scale. © 2019 Society of Chemical Industry

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Improvement of porous polyvinylidene fluoride-co-hexafluropropylene hollow fiber membranes for sweeping gas membrane distillation of ethylene glycol solution

Ajdar

Azdarpour

Mansourizadeh

et al. 2020

Chinese Journal of Chemical Engineering

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Dehydration of diethylene glycol using a vacuum membrane distillation process

Cited by 6 publications

References 22 publications

Concentration of 1,3-dimethyl-2-imidazolidinone in Aqueous Solutions by Sweeping Gas Membrane Distillation: From Bench to Industrial Scale

Concentration of 1,3-dimethyl-2-imidazolidinone in Aqueous Solutions by Sweeping Gas Membrane Distillation: From Bench to Industrial Scale

A review of nanoparticle‐enhanced membrane distillation membranes: membrane synthesis and applications in water treatment

Improvement of porous polyvinylidene fluoride-co-hexafluropropylene hollow fiber membranes for sweeping gas membrane distillation of ethylene glycol solution

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