Enhanced hydrogen separation by vertically-aligned carbon nanotube membranes with zeolite imidazolate frameworks as a selective layer

Ge, Lei, Du, Aijun, Hou, Meng, Rudolph, Victor and Zhu, Zhonghua (2012) Enhanced hydrogen separation by vertically-aligned carbon nanotube membranes with zeolite imidazolate frameworks as a selective layer. Rsc Advances, 2 31: 11793-11800. doi:10.1039/c2ra21460a


Author Ge, Lei
Du, Aijun
Hou, Meng
Rudolph, Victor
Zhu, Zhonghua
Title Enhanced hydrogen separation by vertically-aligned carbon nanotube membranes with zeolite imidazolate frameworks as a selective layer
Journal name Rsc Advances   Check publisher's open access policy
ISSN 2046-2069
Publication date 2012-01-01
Sub-type Article (original research)
DOI 10.1039/c2ra21460a
Open Access Status Not Open Access
Volume 2
Issue 31
Start page 11793
End page 11800
Total pages 8
Place of publication Cambridge, United Kingdom
Publisher R S C Publications
Language eng
Formatted abstract
Vertically-aligned carbon nanotube (VACNT) membranes show very high permeation fluxes due to the inherent smooth and frictionless nature of the interior of the nanotubes. However, the hydrogen selectivities are all in the Knudsen range and are quite low. In this study we grew molecular sieve zeolite imidazolate frameworks (ZIFs) via secondary seeded growth on the VACNT membranes as a gas selective layer. The ZIF layer has a thickness of 5–6 mm and shows good contact with the VACNT membrane surface. The VACNT supported ZIF membrane shows much higher H2  selectivity than Ar (7.0); O2 (13.6); N2 (15.1) and CH4 (9.8). We conclude that tailoring metal–organic frameworks on the membrane surface can be an effective route to improve the gas separation performance of the VACNT membrane.
Keyword Molecular-Sieve Membrane
Metal-Organic Frameworks
Mixed-Matrix Membranes
Electroosmotic Flow
Mass-Transport
Adsorption
Diffusion
Filter
Gas
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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