Membrane-assisted vapor stripping: energy efficient hybrid distillation-vapor permeation process for alcohol-water separation

2008 ◽  
Vol 83 (9) ◽  
pp. 1275-1287 ◽  
Author(s):  
Leland M Vane ◽  
Franklin R Alvarez
Keyword(s):  
Energy Efficient ◽  
Water Separation ◽  
Vapor Permeation ◽  
Alcohol Water ◽  
Vapor Stripping

Experimental validation of hybrid distillation-vapor permeation process for energy efficient ethanol–water separation

2009 ◽  
pp. n/a-n/a ◽  
Author(s):  
Leland M. Vane ◽  
Franklin R. Alvarez ◽  
Yu Huang ◽  
Richard W. Baker
Keyword(s):  
Energy Efficient ◽  
Experimental Validation ◽  
Water Separation ◽  
Vapor Permeation

scholarly journals Combined Vapor Permeation and Continuous Solid-State Distillation for Energy-Efficient Bioethanol Production

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2266
Author(s):  
Hongshen Li ◽  
Hongrui Liu ◽  
Yufang Li ◽  
Jilin Nan ◽  
Chen Shi ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Efficient ◽  
Simulation Software ◽  
Separation Performance ◽  
Flow Sheet ◽  
Bioethanol Production ◽  
Permeate Flux ◽  
Rectification Column ◽  
Vapor Permeation ◽  
Wide Range

Extracting ethanol by steam directly from fermented solid-state bagasse is an emerging technology of energy-efficient bioethanol production. With continuous solid-state distillation (CSSD) approach, the vapor with more than 25 wt% ethanol flows out of the column. Conventionally, the vapor was concentrated to azeotrope by rectification column, which contributes most of the energy consumption in ethanol production. As an alternative, a process integrating CSSD and vapor permeation (VP) membrane separation was tested. In light of existing industrial application of NaA zeolite hydrophilic membrane for dehydration, the prospect of replacing rectification operation with hydrophobic membrane for ethanol enriching was mainly analyzed in this paper. The separation performance of a commercial PDMS/PVDF membrane in a wide range of ethanol–water-vapor binary mixture was evaluated in the experiment. The correlation of the separation factor and permeate flux at different transmembrane driving force was measured. The mass and energy flow sheet of proposed VP case and rectification case were estimated respectively with process simulation software based on experimental data. Techno-economic analysis on both cases was performed. The results demonstrated that the additional VP membrane cost was higher than the rectification column, but a lower utilities cost was required for VP. The discount payback period of supplementary cost for VP case was determined as 1.81 years compared with the membrane service lifetime of 3 years, indicating that the hybrid CSSD-VP process was more cost effective and energy efficient.

scholarly journals Recent Hydrophobic Metal-Organic Frameworks and Their Applications

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2250 ◽  
Author(s):  
Ruth Antwi-Baah ◽  
Heyang Liu
Keyword(s):  
Metal Organic Frameworks ◽  
Synthesis Methods ◽  
Water Separation ◽  
Liquid Marbles ◽  
Alcohol Water ◽  
Methods Of Synthesis ◽  
Metal Organic ◽  
Oil Water ◽  
And Storage ◽  
Alcohol Adsorption

The focus of discussion of this review is the application of the most recent synthesized hydrophobic metal-organic frameworks (MOFs). The most promising hydrophobic MOFs are mentioned with their applications and discussed. The various MOFs considered are sub-sectioned into the main application areas, namely alcohol adsorption and oil/water-alcohol/water separation, gas separation and storage, and other applications such as self-cleaning and liquid marbles. Again, the methods of synthesis are briefly described, showing how the features of the end product aid in their applications. The efficiency of the MOF materials and synthesis methods are highlighted and briefly discussed. Lastly, the summary and outlook section concludes the write-up giving suggestions that would be useful to present-day researchers.

High-Pressure Phase Equilibrium Studies of Multicomponent (Alcohol-Water-Ionic Liquid-CO2) Systems

2020 ◽  
Vol 6 (1) ◽  
pp. 9
Author(s):  
Małgorzata E. Zakrzewska ◽  
Ana B. Paninho ◽  
M. Fátima C. Guedes da Silva ◽  
Ana V. M. Nunes
Keyword(s):  
High Pressure ◽  
Ionic Liquid ◽  
Phase Equilibrium ◽  
Process Intensification ◽  
High Pressure Phase ◽  
Equilibrium Studies ◽  
Water Separation ◽  
Alcohol Water ◽  
Product Separation ◽  
Pressure Phase

Selective water (by-product) separation from reaction mixtures stands as an important process intensification strategy for equilibrium-limited reactions. In this work, the possibility of using a high-pressure biphasic reaction media composed of a hydrophobic ionic liquid, 1-hexy-3-methylimidazolium tetracyanoborate, and carbon dioxide was explored for levulinic acid production from 1,4-butanediol. Vapour-liquid equilibrium measurements were performed for the binary (diol+CO2), ternary (diol+CO2+IL), and quaternary systems (diol+CO2+IL+water), at 313.2 K and pressures up to 18 MPa. The static analytical method was used in a high-pressure phase equilibrium apparatus equipped with a visual sapphire cell. The capability of the quaternary system to perform physical water separation is discussed in this paper.

scholarly journals Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation

Membranes ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 86 ◽  
Author(s):  
Kyohei Ueno ◽  
Saki Yamada ◽  
Toshinari Watanabe ◽  
Hideyuki Negishi ◽  
Takuya Okuno ◽  
...  
Keyword(s):  
Alternative Energy ◽  
Separation Performance ◽  
Water Mixture ◽  
Water Separation ◽  
Zeolite Membranes ◽  
Pure Silica ◽  
Large Pore ◽  
Silica Supports ◽  
Alcohol Water ◽  
Type Zeolite

Hydrophobic pure-silica *BEA-type zeolite membranes with large pores were prepared on tubular silica supports by hydrothermal synthesis using a secondary growth method and were applied to the separation of alcohol/water mixtures by pervaporation (PV), an alternative energy-efficient process for production of biofuels. Amorphous pure-silica tubular silica supports, free of Al atoms, were used for preparing the membranes. In this study, the effects of the synthesis conditions, such as the H2O/SiO2 and NH4F/SiO2 ratios in the synthetic gel, on the membrane formation process and separation performance were systematically investigated. The successfully prepared dense and continuous membranes exhibited alcohol selectivity and high flux for the separation of ethanol/water and butanol/water mixtures. The pure-silica *BEA membranes obtained under optimal conditions (0.08SiO2:0.5TEAOH:0.7NH4F:8H2O) showed high PV performance with a separation factor of 229 and a flux of 0.62 kg·m−2·h−1 for a 1 wt % n-butanol/water mixture at 318 K. This result was attributed to the hydrophobicity and large pore size of the pure-silica *BEA membrane. This was the first successful synthesis of hydrophobic large-pore zeolite membranes on tubular supports with alcohol selectivity, and the obtained results could provide new insights into the research on hydrophobic membranes with high permeability.

scholarly journals A novel close-circulating vapor stripping-vapor permeation technique for boosting biobutanol production and recovery

2018 ◽  
Vol 11 (1) ◽  
Author(s):  
Chao Zhu ◽  
Lijie Chen ◽  
Chuang Xue ◽  
Fengwu Bai
Keyword(s):  
Vapor Permeation ◽  
Vapor Stripping

Separating isopropanol from its diluted solutions via a process of integrating gas stripping and vapor permeation

RSC Advances ◽  
2015 ◽  
Vol 5 (31) ◽  
pp. 24031-24037 ◽  
Author(s):  
Yu Guan ◽  
Song Hu ◽  
Ying Wang ◽  
Peiyong Qin ◽  
M. Nazmul Karim ◽  
...  
Keyword(s):  
Energy Efficient ◽  
The Novel ◽  
Gas Stripping ◽  
Vapor Permeation

The novel process, integrated gas stripping and vapor permeation, is environmental, energy-efficient and highly selective for isopropanol recovery.

Methods to improve flux during alcohol/water azeotrope separation by vapor permeation

1992 ◽  
Vol 68 (3) ◽  
pp. 229-239 ◽  
Author(s):  
A.E. Jansen ◽  
W.F. Versteeg ◽  
B. van Engelenburg ◽  
J.H. Hanemaaijer ◽  
B.Ph. ter Meulen
Keyword(s):  
Vapor Permeation ◽  
Alcohol Water ◽  
Water Azeotrope
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