Spillover-enhanced hydrogen adsorption on NiNaY composites at cryogenic temperature

Ding, R. G., Zhu, Z. H., Yao, X. D., Lu, G. Q. and Yan, Z. F. (2008). Spillover-enhanced hydrogen adsorption on NiNaY composites at cryogenic temperature. In: 17th World Hydrogen Energy Conference (WHEC2008), Brisbane, Australia, (586-589). 15-19 June 2008.


Author Ding, R. G.
Zhu, Z. H.
Yao, X. D.
Lu, G. Q.
Yan, Z. F.
Title of paper Spillover-enhanced hydrogen adsorption on NiNaY composites at cryogenic temperature
Conference name 17th World Hydrogen Energy Conference (WHEC2008)
Conference location Brisbane, Australia
Conference dates 15-19 June 2008
Journal name 17th World Hydrogen Energy Conference 2008, WHEC 2008
Publication Year 2008
ISBN 9781615674541
Volume 1
Start page 586
End page 589
Total pages 4
Language eng
Abstract/Summary Spillover effect possesses the potential to enhance hydrogen adsorption on some metal composites above room temperatures. However, the enhancement effect of spillover for hydrogen adsorption at low temperatures has seldom been investigated. In this article, the NiNaY composites have been investigated using various techniques to explore their hydrogen adsorption performance and structural characteristics. Hydrogen adsorption capacities of reduced NiNaY composites are significantly enhanced under various temperatures and pressures. Most noteworthy is that at room temperature and low pressure, hydrogen adsorption amount is increased by a remarkable factor of 7.1 for reduced 10 wt% NiNaY composite. Dissociative hydrogen adsorption and subsequent hydrogen spillover at high pressure have improved hydrogen adsorption capacity by a factor of 0.4 and 0.86 on reduced 10 wt% NiNaY composite at 77 and 303 K, respectively. The enhancement effect of hydrogen adsorption on the reduced composites at room temperature is determined by hydrogen adsorption on available nickel sites which are characterized by the active nickel surface areas. However, the optimized hydrogen adsorption enhancement effect on the composite at 77 K is achieved with a combination of suitable active nickel surface area and active support area. The current study confirms that spillover effect is occurring at 77 K on the reduced NiNaY composites. The result is encouraging and optimized metal-adsorbent composites are promising media achieving higher hydrogen adsorption capacity at suitable conditions.
Subjects 0904 Chemical Engineering
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status Unknown

 
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Created: Wed, 10 Mar 2010, 09:06:49 EST by Laura McTaggart on behalf of Faculty Of Engineering, Architecture & Info Tech