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

Synthesis of Potassium Ionic Sieve Membrane and its Selectivity to Potassium Ion in Seawater

2010 ◽  
Vol 178 ◽  
pp. 300-307 ◽  
Author(s):  
Jun Sheng Yuan ◽  
Fei Li ◽  
Hui Ru Han ◽  
Zhi Yong Ji
Keyword(s):  
Hydrothermal Synthesis ◽  
Gas Permeability ◽  
Knudsen Diffusion ◽  
Potassium Ion ◽  
Zeolite Membranes ◽  
Al2o3 Tube ◽  
Separation Factors ◽  
Α Al2o3 ◽  
High Separation ◽  
The Ideal

Potassium ionic sieve membrane was synthesized on porous α-Al2O3 tube support by the hydrothermal synthesis. The zeolite membranes were characterized by means of XRD and SEM. And the single-gas permeability through the membranes and selectivity to K+, Na+, Ca2+, Mg2+ were measured. The results show that the ideal separation factor is 3.68, which is close to Knudsen diffusion ratio 3.74 for H2/N2; the separation factors of the potassium ionic sieve membrane are , , respectively, indicating its high separation selectivity to potassium ion.

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+.

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

Increasing H2/N2 separation selectivity in CHA zeolite membranes by adding a third gas

2015 ◽  
Vol 496 ◽  
pp. 118-124 ◽  
Author(s):  
Nicholas O. Chisholm ◽  
Grace C. Anderson ◽  
Jordan F. McNally ◽  
Hans H. Funke ◽  
Richard D. Noble ◽  
...  
Keyword(s):  
Zeolite Membranes ◽  
Separation Selectivity

SAPO-34 zeotype membrane for gas sweetening

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
I Gusti B. N. Makertihartha ◽  
Kevin S. Kencana ◽  
Theodorus R. Dwiputra ◽  
Khoiruddin Khoiruddin ◽  
Graecia Lugito ◽  
...  
Keyword(s):  
Gas Separation ◽  
Future Development ◽  
High Performance ◽  
Energy Requirement ◽  
Scale Up ◽  
Separation Performance ◽  
Membrane Gas Separation ◽  
Zeolite Membranes ◽  
Gas Sweetening ◽  
High Separation

AbstractMembranes are considered promising tools for gas sweetening due to their lower footprint (i.e., area and energy requirement, considering elimination of solvent/absorbent and its associated regeneration procedures), and ease of scale-up. Performing membrane gas separation is strongly dependent on membrane materials. With a 0.38-nm pore size, the SAPO-34 membrane surpasses the upper bond limit for CO2/CH4 separation. However, preparing defect-free and high-performance zeolite membranes is quite challenging. This paper reviews gas transport and separation mechanisms in SAPO-34 membranes, and it discusses prospective approaches for obtaining membranes with defect-free selective layers and hence high separation performance. Highlights, as well as the authors’ perspectives on the future development of SAPO-34 membranes in the field of gas separation, are pointed out.

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...

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