Synthesis of NaA zeolite membrane by maintaining pressure difference between the two sides of the support

CrystEngComm ◽  
2018 ◽  
Vol 20 (44) ◽  
pp. 7195-7205 ◽  
Author(s):  
Xue-Ling Wei ◽  
Huan Liu ◽  
Yao-Yi Xu ◽  
Ya-Li Sun ◽  
Zi-Sheng Chao
Keyword(s):  
Active Ingredient ◽  
Pressure Difference ◽  
Zeolite Membrane ◽  
Zeolite Membranes ◽  
Naa Zeolite ◽  
Two Sides ◽  
Naa Zeolite Membrane

Pressure difference assists more Si/Al active ingredient migration to the surface of the support and thus facilitates the formation of uniform and dense zeolite membranes.

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.

Microwave-Assisted Secondary Synthesis of NaA Zeolite Membranes Grown on ZrO2 Substrate

2013 ◽  
Vol 477-478 ◽  
pp. 1481-1484
Author(s):  
Zhi Lin Cheng ◽  
Xi Xi Qin
Keyword(s):  
Gas Permeability ◽  
Knudsen Diffusion ◽  
Transformation Method ◽  
Zeolite Membrane ◽  
Sem Images ◽  
Zeolite Membranes ◽  
Xrd Pattern ◽  
Naa Zeolite ◽  
Xrd Patterns ◽  
Naa Zeolite Membrane

The highly intergrown NaA zeolite membranes on seeded ZrO2substrate were synthesized by microwave heating method. The preparation of seeds with the size of ca.60nm employed the vapor phase transformation method (VPT). The XRD patterns indicated that the pure NaA zeolite membranes formed on the seeded ZrO2substrate for varied synthesis times. However, the peak intensity of NaA zeolite membrane after 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 for 15-30min had a good integrity and consisted of highly intergrown zeolite crystals, but the NaA membrane after 50min appeared some large defects, further verifying the result of XRD pattern. The gas permeability showed that the H2/N2and H2/C3H8permselectivities on zeolite membrane attained 4.01 and 8.13, 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.

Effect of sol–gel-based silica buffer layer on the formation of NaA zeolite membrane

2012 ◽  
Vol 64 (1) ◽  
pp. 117-123 ◽  
Author(s):  
Milan Kanti Naskar ◽  
Debtosh Kundu ◽  
Minati Chatterjee
Keyword(s):  
Buffer Layer ◽  
Sol Gel ◽  
Zeolite Membrane ◽  
Naa Zeolite ◽  
Naa Zeolite Membrane

The effect of intermediate layer on synthesis and gas permeation properties of NaA zeolite membrane

2009 ◽  
Vol 7 (3) ◽  
pp. 383-390 ◽  
Author(s):  
Nandini Das ◽  
Debtosh Kundu ◽  
Minati Chatterjee
Keyword(s):  
Intermediate Layer ◽  
Gas Permeation ◽  
Zeolite Membrane ◽  
Naa Zeolite ◽  
Naa Zeolite Membrane ◽  
Permeation Properties

Synthesis and characterization of a NaA zeolite membrane and its applications for desalination of radioactive solutions

Desalination ◽  
2008 ◽  
Vol 225 (1-3) ◽  
pp. 199-208 ◽  
Author(s):  
A. Malekpour ◽  
M.R. Millani ◽  
M. Kheirkhah
Keyword(s):  
Zeolite Membrane ◽  
Synthesis And Characterization ◽  
Naa Zeolite ◽  
Naa Zeolite Membrane

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

Esterification of Acetic Acid and n-Propanol with Vapor Permeation Using NaA Zeolite Membrane

2013 ◽  
Vol 52 (19) ◽  
pp. 6336-6342 ◽  
Author(s):  
Weixing Li ◽  
Weiwei Liu ◽  
Weihong Xing ◽  
Nanping Xu
Keyword(s):  
Acetic Acid ◽  
Zeolite Membrane ◽  
Naa Zeolite ◽  
Vapor Permeation ◽  
Naa Zeolite Membrane
Sign in / Sign up

Export Citation Format

Share Document