Janus Charged Polyamide Nanofilm with Ultra-High Separation Selectivity for Mono-/divalent Ions

2021 ◽  
pp. 129023
Author(s):  
Ze-Lin Qiu ◽  
Wen-Han Yu ◽  
Yu-Jie Shen ◽  
Bao-Ku Zhu ◽  
Li-Feng Fang
Keyword(s):  
Divalent Ions ◽  
Separation Selectivity ◽  
High Separation

Selective removal of transition metal ions from aqueous solution by metal–organic frameworks

RSC Advances ◽  
2015 ◽  
Vol 5 (88) ◽  
pp. 72107-72112 ◽  
Author(s):  
Yutian Zhang ◽  
Xudong Zhao ◽  
Hongliang Huang ◽  
Zhengjie Li ◽  
Dahuan Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Organic Frameworks ◽  
Transition Metal Ions ◽  
Selective Removal ◽  
Carboxyl Groups ◽  
Separation Selectivity ◽  
Metal Organic ◽  
High Separation

Carboxyl groups in adjacent ligands in UiO-66(Zr)–2COOH exhibit specific capture performance for Cu2+, resulting in high separation selectivity for Cu2+/Ni2+.

Development of a Coating Method for Polydecylmethylsiloxane Selective Layer on Polysulfone Hollow Fiber Support

2021 ◽  
Vol 899 ◽  
pp. 275-280
Author(s):  
Ilya L. Borisov ◽  
Evgenia Grushevenko ◽  
Elena Buinova ◽  
Vladimir Volkov
Keyword(s):  
Composite Membrane ◽  
Hollow Fiber ◽  
Model Mixture ◽  
Outer Side ◽  
Selective Layer ◽  
Methane Gas ◽  
Separation Selectivity ◽  
Coating Method ◽  
High Separation ◽  
Layer Coating

The paper presents a comparison of the techniques for polydecylmethylsiloxane selective layer coating to the inner and outer sides of a polysulfone hollow fiber support. It has been shown that coating to the outer side allows one to obtain a composite membrane with a higher selectivity for CO2/N2 vapor. A decrease in the number of defects in the selective layer is achieved by increasing the viscosity of the polydecylmethylsiloxane solution. The resulting membrane was characterized in the separation of a model mixture of hydrocarbons, and a high separation selectivity was shown - 12.4 with respect to the n-butane / methane gas pair.

Investigation on Zr-based metal-organic framework (MOF-801) for high-performance separation of light alkanes

2021 ◽  
Author(s):  
Hao Liu ◽  
Boran Li ◽  
Yayun Zhao ◽  
Chunlong Kong ◽  
Chen Zhou ◽  
...  
Keyword(s):  
Chemical Stability ◽  
High Performance ◽  
Metal Organic Framework ◽  
Synthesis Method ◽  
Light Alkanes ◽  
Separation Selectivity ◽  
Metal Organic ◽  
High Separation ◽  
Thermal And Chemical Stability ◽  
Organic Framework

A Zr-based metal-organic framework (MOF-801) with high thermal and chemical stability was prepared by solvethermal synthesis method. Notably, MOF-801 exhibits high separation selectivity for C3H8/CH4 and C2H6/CH4, making it possible...

High separation selectivity with imperfect zeolite membranes

1999 ◽  
pp. 1309-1310 ◽  
Author(s):  
Elena Piera ◽  
Joaquin Coronas ◽  
Miguel Menéndez ◽  
Jesús Santamaría
Keyword(s):  
Zeolite Membranes ◽  
Separation Selectivity ◽  
High Separation

Dopant aggregation and precipitation in alkali halides doped with divalent ions

1980 ◽  
Vol 41 (C6) ◽  
pp. C6-68-C6-71 ◽  
Author(s):  
J. Corish ◽  
J. M. Quigley ◽  
C. R. A. Catlow ◽  
P. W.M. Jacobs
Keyword(s):  
Alkali Halides ◽  
Divalent Ions

scholarly journals Optimization of Mordenite Membranes Using Sucrose Precursor for Pervaporation of Water-Ethanol Mixtures

Membranes ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 160
Author(s):  
Abdulaziz A. Alomair ◽  
Yousef Alqaheem
Keyword(s):  
Pyrolysis Temperature ◽  
Operating Temperature ◽  
Selective Adsorption ◽  
Sucrose Concentration ◽  
Low Cost ◽  
Water Flux ◽  
Separation Performance ◽  
Carbon Membranes ◽  
Adsorption Of Water ◽  
High Separation

Post-treated mordenite membranes were prepared using sucrose (C12H22O11) as a carbon precursor to block any pinholes and defects in the zeolite layer. The pervaporation (PV) process was used to separate ethanol from the water. The effects of the sucrose concentration and the pyrolysis temperature (650–850 °C) were investigated, and the resulting high separation performance compared to those post/pre-treated membranes was reported in the literature. In this study, mordenite carbon membranes yielded a water/ethanol separation factor of 990.37 at a water flux of 9.10 g/m2h. The influence of the operating temperature on the performance of the membrane also was considered. It was concluded that the selective adsorption of water through zeolite pores was achieved. The entire preparation procedure was achieved using a rapid, low-cost preparation process.

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