The induced orientation effect of linear gases during transport in a NaA zeolite membrane modified by alkali lignin

2021 ◽  
Vol 620 ◽  
pp. 118971
Author(s):  
Xuechao Gao ◽  
Chao Da ◽  
Cheng Chen ◽  
Zongheng Li ◽  
Xuehong Gu ◽  
...  
Keyword(s):  
Zeolite Membrane ◽  
Orientation Effect ◽  
Alkali Lignin ◽  
Naa Zeolite ◽  
Naa Zeolite Membrane

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.

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

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

Methanol dehydration in NaA zeolite membrane reactor

2015 ◽  
Vol 486 ◽  
pp. 189-194 ◽  
Author(s):  
D.A. Fedosov ◽  
A.V. Smirnov ◽  
V.V. Shkirskiy ◽  
T. Voskoboynikov ◽  
I.I. Ivanova
Keyword(s):  
Membrane Reactor ◽  
Zeolite Membrane ◽  
Methanol Dehydration ◽  
Naa Zeolite ◽  
Naa Zeolite Membrane
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