Synthesis and gas permeation properties of an NaA zeolite membrane

2000 ◽  
pp. 603-604 ◽  
Author(s):  
Xiaochun Xu ◽  
Weishen Yang ◽  
Jie Liu ◽  
Xiaobo Chen ◽  
Liwu Lin ◽  
...  
Keyword(s):  
Gas Permeation ◽  
Zeolite Membrane ◽  
Naa Zeolite ◽  
Naa Zeolite Membrane ◽  
Permeation Properties

Synthesis, characterization and single gas permeation properties of NaA zeolite membrane

2005 ◽  
Vol 249 (1-2) ◽  
pp. 51-64 ◽  
Author(s):  
Xiaochun Xu ◽  
Yun Bao ◽  
Chunshan Song ◽  
Weishen Yang ◽  
Jie Liu ◽  
...  
Keyword(s):  
Gas Permeation ◽  
Zeolite Membrane ◽  
Naa Zeolite ◽  
Naa Zeolite Membrane ◽  
Permeation Properties

scholarly journals Performance of Annealed Composite Cellulose Acetate/NaA Zeolite Membrane in Carbon dioxide/Methane Gas Separation

2020 ◽  
Vol 6 (2) ◽  
pp. 146-155
Author(s):  
Asep Hadian Hadinata ◽  
Agnes Rezky Siahaan ◽  
Mohamad Ghifary ◽  
Dewi Agustina Iryani ◽  
Engela Evy Ernawati
Keyword(s):  
Cellulose Acetate ◽  
Phase Inversion ◽  
Cellulose Fiber ◽  
Gas Permeation ◽  
Zeolite Membrane ◽  
High Quality ◽  
Naa Zeolite ◽  
Phase Inversion Technique ◽  
Separation Of Co2 ◽  
Naa Zeolite Membrane

Ramie (Boehmeria nivea) is one type of plant used to produce high quality cellulose fiber. Its fiber is convertible to cellulose acetate (CA), which is commonly used as membrane’s material. Dense CA membrane is used in gas permeation process and the performance is improvable by mineral blending and annealing. This study aims to determine the characteristics of modified CA membranes and the performance in separation of CO2/CH4 gases. Membrane preparation was carried out by using phase inversion technique, while annealing was carried out at 60oC. Furthermore, NaA zeolite was added with various concentrations, which include 5, 10, 15 and 20%. Gas permeation was carried out at 4 barrer for an hour. The performance of the membrane was measured based on its permeability and selectivity. The results showed that CA membrane with 10% zeolite yielded the best performance with CO2 and CH4 permeability of 140.55 and 22.25 barrer respectively and selectivity of CO2/CH4 6.32.

Synthesis and preliminary gas permeation studies of a tubular NaA zeolite membrane (NZM)

2017 ◽  
Vol 204 (10) ◽  
pp. 1157-1166 ◽  
Author(s):  
Nong Xu ◽  
Sang Moon Lee ◽  
Sung Su Kim ◽  
Anwu Li ◽  
C. Jim Lim ◽  
...  
Keyword(s):  
Gas Permeation ◽  
Zeolite Membrane ◽  
Naa Zeolite ◽  
Permeation Studies ◽  
Naa Zeolite Membrane

scholarly journals Gas Permeation Properties of High-Silica CHA-Type Zeolite Membrane

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 249
Author(s):  
Yasuhisa Hasegawa ◽  
Chie Abe ◽  
Mayumi Natsui ◽  
Ayumi Ikeda
Keyword(s):  
Molecular Size ◽  
Gas Permeation ◽  
Zeolite Membrane ◽  
Type Zeolite ◽  
High Silica ◽  
Separation Of Co2 ◽  
Α Al2o3 ◽  
Separation Performances ◽  
Molecular Sieving ◽  
Permeation Properties

The polycrystalline CHA-type zeolite layer with Si/Al = 18 was formed on the porous α-Al2O3 tube in this study, and the gas permeation properties were determined using single-component H2, CO2, N2, CH4, n-C4H10, and SF6 at 303–473 K. The membrane showed permeation behavior, wherein the permeance reduced with the molecular size, attributed to the effect of molecular sieving. The separation performances were also determined using the equimolar mixtures of N2–SF6, CO2–N2, and CO2–CH4. As a result, the N2/SF6 and CO2/CH4 selectivities were as high as 710 and 240, respectively. However, the CO2/N2 selectivity was only 25. These results propose that the high-silica CHA-type zeolite membrane is suitable for the separation of CO2 from CH4 by the effect of molecular sieving.

Microwave-Assisted Synthesis and Permeation Performance of NaA Zeolite Membrane by Secondary Growth Method

2014 ◽  
Vol 1053 ◽  
pp. 389-393
Author(s):  
Zhi Lin Cheng ◽  
Ying Ying Liu
Keyword(s):  
Gas Permeability ◽  
Knudsen Diffusion ◽  
Secondary Growth ◽  
Zeolite Membrane ◽  
Microwave Assisted Synthesis ◽  
Vapor Phase Transport ◽  
Zeolite Membranes ◽  
Synthesis Time ◽  
Naa Zeolite ◽  
Naa Zeolite Membrane

The highly intergrown NaA zeolite membranes on seeded α-Al2O3substrate were synthesized by microwave heating method. The preparation of seeds with the size of ca.120nm employed the vapor phase transport method (VPT). The XRD patterns indicated that the pure NaA zeolite membranes formed on the seeded α-Al2O3substrate for varied synthesis times. However, the peak intensity of NaA zeolite membrane with synthesis time of 50min obviously decreased, suggesting that the NaA membrane could take place the dissolution at that time. The SEM images indicated that the NaA zeolite membranes with synthesis time of 15-30min had a good integrity and consisted of highly intergrown zeolite crystals, but the NaA membrane with synthesis time of 50min appeared some large defects, further verifying the result of XRD pattern. The gas permeability showed that the maximum of H2/N2and H2/C3H8permselectivities attained 4.23 and 8.24, respectively, higher than those of the corresponding Knudsen diffusion. These results suggested that the diffusion of gases, at least in part, are affected by the pore size of zeolite and the function of molecular sieving can be embodied on the synthesized membrane.

Synthesis and gas permeation properties of silicalite-1 zeolite membrane

1998 ◽  
Vol 41 (3) ◽  
pp. 325-330 ◽  
Author(s):  
Xiaochun Xu ◽  
Mojie Cheng ◽  
Weishen Yang ◽  
Liwu Lin
Keyword(s):  
Gas Permeation ◽  
Zeolite Membrane ◽  
Permeation Properties
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