Solvent-aided layer crystallization—Case study glycerol–water

Eisenbart, Felix J.; Ulrich, Joachim

doi:10.1016/j.ces.2014.12.060

Cited by 24 publications

(10 citation statements)

References 20 publications

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“…Crystallization is widely used as a purification and separation process in industry due to its ability to provide high‐purity separation. Hence, solvent‐aided crystallization (SAC) is suggested as a method to purify biodiesel with the inspiration derived from a case study done by Eisenbart and Ulrich . This separation technique is suitable for high‐viscous melts such as glycerol and biodiesel.…”

Section: Introductionmentioning

confidence: 99%

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Solvent‐Aided Crystallization for Biodiesel Purification

et al. 2020

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The application of solvent‐aided crystallization (SAC) is based on the addition of a solvent, here 1‐butanol, to crude biodiesel to catalyze the purification process by separating biodiesel from contaminants via crystallization process. Response surface methodology was applied to optimize the process parameters of SAC, represented by biodiesel purity. The purified biodiesel was analyzed by means of gas chromatography‐mass spectrometry for the composition of the present fatty acid methyl ester (FAME). Under the predicted optimum process conditions within the experimental ranges for the highest biodiesel purity, the predicted biodiesel purity was 99.375 %.

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Section: Introductionmentioning

confidence: 99%

“…A previous study on biodiesel purification using crystallization without addition of solvent shows that a separation efficiency of only 46.734 % was achieved . In the study by Eisenbart and Ulrich , 1‐butanol served as solvent to control crystallization kinetics of a water‐glycerol mixture.…”

Section: Introductionmentioning

confidence: 99%

Solvent‐Aided Crystallization for Biodiesel Purification

et al. 2020

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“…As a recommendation for improving water removal from biodiesel wastewater, the addition of a solvent during FC might help the water to easily become ice where crystallization kinetics could be controlled and separation efficiency could be enhanced since biodiesel wastewater is a highly viscous solution [32]. The highest obtained S E (64.59 %) indicates that the process successfully removes more than half of the water content from produced water.…”

Section: Performance Of Pfc Methods Towards Produced Water and Biodiesmentioning

confidence: 99%

“…Thus, formation and growth of an ice crystal from produced water is easier as compared to biodiesel wastewater. As a recommendation for improving water removal from biodiesel wastewater, the addition of a solvent during FC might help the water to easily become ice where crystallization kinetics could be controlled and separation efficiency could be enhanced since biodiesel wastewater is a highly viscous solution [32]. A higher viscosity declines the rate of crystal growth, thus reduces the formation of ice crystals [33].…”

Section: Performance Of Pfc Methods Towards Produced Water and Biodiesmentioning

confidence: 99%

Progressive Freeze Concentration for Volume Reduction of Produced Water and Biodiesel Wastewater

et al. 2019

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One way to conserve fresh water resources is by reusing water from wastewater. For instance, water can be removed from wastewater through formation of ice crystal layers by progressive freeze concentration (PFC). The application of PFC to remove water from produced water and biodiesel wastewater was assessed through the final concentration of concentrated wastewater and purity of melted ice crystals. No PFC study has been done on these applications. In order to evaluate the efficiency of PFC, the effective partition constant (K) and separation efficiency (S E ) were calculated for the effect of stirring rate and coolant temperature. The results demonstrate that PFC is a more practical method for produced water, as compared to biodiesel wastewater which is based on the value of low K and high S E .

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“…The crystal layer usually forms a complex porous framework in various crystallization devices. The investigation of the properties of the crystal layer structure and mass transfer in this framework drew the constant focus, the separation effect and efficiency of crystallization [10][11][12], the fluid separation and impurity inclusion in the crystal layer of the layer crystallization [13][14][15][16][17][18][19], etc. The crystal layer formed via the polythermal process (under different cooling profile) possessed various structural properties along the characteristic direction of the cooling surface.…”

Section: Introductionmentioning

confidence: 99%

Porosity Distribution Simulation and Impure Inclusion Analysis of Porous Crystal Layer Formed via Polythermal Process

Meng

et al. 2021

Crystals

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In this work, we investigated the porosity distribution and separation property of the porous crystal layer formed via the polythermal process. The proposed porosity distribution model, considering both the cooling profile and the crystal settling effect, provided simulative results that met the MRI analysis experimental results with suitable agreement. Significant porosity variation from the top to the bottom of the crystal layer (ϕ from 0.75 to 0.55 under rapid cooling profile) was detected. Meanwhile, the vertical supersaturation degree gradient induced by the fluid fluctuation could impact nucleation and crystal growth kinetic along with crystal particle settling. The resulting crystal layer possessed various impurity inclusion conditions. Under a moderate cooling profile (0.4 K·min−1), the volume fraction of closed pores against overall pores decreased from 0.75 to 0.36. The proposed model and experimental analysis approach were demonstrated to be helpful for porosity distribution simulation and impure inclusion analysis of layer crystallization.

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Solvent-aided layer crystallization—Case study glycerol–water

Cited by 24 publications

References 20 publications

Solvent‐Aided Crystallization for Biodiesel Purification

Solvent‐Aided Crystallization for Biodiesel Purification

Progressive Freeze Concentration for Volume Reduction of Produced Water and Biodiesel Wastewater

Porosity Distribution Simulation and Impure Inclusion Analysis of Porous Crystal Layer Formed via Polythermal Process

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