Pervaporation separation of ethanol/water mixture using modified zeolite filled PDMS membranes

2015 ◽  
Vol 132 (17) ◽  
Author(s):  
Lingyun Ji ◽  
Baoli Shi ◽  
Lili Wang
Keyword(s):  
Water Mixture ◽  
Modified Zeolite ◽  
Pervaporation Separation

Application of polyurethane membrane with surface modified ZSM-5 for pervaporation of phenol/water mixture

2017 ◽  
Vol 37 (8) ◽  
pp. 777-784 ◽  
Author(s):  
Hong Ye ◽  
Xiang Zhang ◽  
Zhongguo Zhang ◽  
Boyu Song ◽  
Weiwei Song
Keyword(s):  
Mixed Matrix Membranes ◽  
Trimethylammonium Chloride ◽  
Water Mixture ◽  
Before And After ◽  
Ft Ir ◽  
Phenol Water ◽  
Surface Modified ◽  
Feed Temperature ◽  
Pervaporation Separation ◽  
Polyurethane Membrane

Abstract In the present work, β-cyclodextrin was grafted to the surface of ZSM-5 via 2,3-epoxypropyl trimethylammonium chloride (ETMAC) and epichlorohydrin (EPI) as the bridging agent by ion exchange and sequential grafting. The mixed matrix membranes were prepared using polyurethane (PU) and ZSM-5 before and after modification. Modified ZSM-5 and corresponding MMM were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and scanning electron microscope (SEM). These membranes were applied for the removal of phenol from aqueous solution in pervaporation process. The results showed that modified ZSM-5 dispersed homogeneously in polymer. The flux and pervaporation separation index of PU increased greatly with a limited decrease in selectivity by the addition of modified ZSM-5. The increased feed temperature enhanced both the flux and separation factor of PU and modified PU membranes.

Pervaporation separation of ethanol/water mixture by UV/O3-modified PDMS membranes

2012 ◽  
Vol 100 ◽  
pp. 15-21 ◽  
Author(s):  
Cheng-Lee Lai ◽  
Ywu-Jang Fu ◽  
Jung-Tsai Chen ◽  
Quan-Fu An ◽  
Kuo-Sung Liao ◽  
...  
Keyword(s):  
Water Mixture ◽  
Pervaporation Separation

Preparation of PDMS membrane using water as solvent for pervaporation separation of butanol–water mixture

2013 ◽  
Vol 15 (8) ◽  
pp. 2180 ◽  
Author(s):  
Shufeng Li ◽  
Fan Qin ◽  
Peiyong Qin ◽  
M. Nazmul Karim ◽  
Tianwei Tan
Keyword(s):  
Pdms Membrane ◽  
Water Mixture ◽  
Water As Solvent ◽  
Pervaporation Separation

Polyurethane membrane with a cyclodextrin-modified carbon nanotube for pervaporation of phenol/water mixture

2017 ◽  
Vol 37 (5) ◽  
pp. 449-459 ◽  
Author(s):  
Hong Ye ◽  
Yu Wang ◽  
Xiang Zhang ◽  
Zhongguo Zhang ◽  
Boyu Song
Keyword(s):  
Carbon Nanotubes ◽  
Water Mixture ◽  
Phenol Content ◽  
Chemical Methods ◽  
Chemically Modified ◽  
Comprehensive Performance ◽  
Phenol Water ◽  
Physical And Chemical ◽  
Pervaporation Separation ◽  
Polyurethane Membrane

Abstract Polyurethane (PU) membrane has great potential in pervaporation recovery of phenol from water. In order to improve the permeability of the membrane, cyclodextrin was attached onto carboxylic and hydroxylate carbon nanotubes (CNTs) by physical and chemical methods, with which modified CNTs/PU membranes were prepared. The results showed that the addition of modified CNTs greatly increases the permeability and comprehensive performance of PU membranes in the pervaporation separation of a phenol/water mixture. With 0.5% phenol content in feed at 80°C, the flux and pervaporation separation index of blank PU are 6.10 and 324 kg·μm·m−2·h−1, while those of chemically modified carboxylic CNTs/PU membranes are 156.1 and 655.8 kg·μm·m−2·h−1, respectively.

Pervaporation Separation of Xylene Isomers by Hybrid Membranes of PAAS Filled with Silane-Modified Zeolite

2010 ◽  
Vol 49 (16) ◽  
pp. 7504-7514 ◽  
Author(s):  
Xin Y. Qu ◽  
Hang Dong ◽  
Zhi J. Zhou ◽  
Lin Zhang ◽  
Huan L. Chen
Keyword(s):  
Hybrid Membranes ◽  
Modified Zeolite ◽  
Xylene Isomers ◽  
Pervaporation Separation

Formation of high temperature phase in flash-evaporated SnSe films

1990 ◽  
Vol 48 (4) ◽  
pp. 698-699
Author(s):  
J.P.S. Hanjra
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Energy Gap ◽  
Dominant Role ◽  
Fine Powder ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Water Mixture ◽  
Flash Evaporation ◽  
Photovoltaic Applications

Tin mono selenide (SnSe) with an energy gap of about 1 eV is a potential material for photovoltaic applications. Various authors have studied the structure, electronic and photoelectronic properties of thin films of SnSe grown by various deposition techniques. However, for practical photovoltaic junctions the electrical properties of SnSe films need improvement. We have carried out investigations into the properties of flash evaporated SnSe films. In this paper we report our results on the structure, which plays a dominant role on the electrical properties of thin films by TEM, SEM, and electron diffraction (ED).Thin films of SnSe were deposited by flash evaporation of SnSe fine powder prepared from high purity Sn and Se, onto glass, mica and KCl substrates in a vacuum of 2Ø micro Torr. A 15% HF + 2Ø% HNO3 solution was used to detach SnSe film from the glass and mica substrates whereas the film deposited on KCl substrate was floated over an ethanol water mixture by dissolution of KCl. The floating films were picked up on the grids for their EM analysis.

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