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Preparation and characterization of hollow glass microspheres (HGMs) for hydrogen storage using urea as a blowing agent

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Title Preparation and characterization of hollow glass microspheres (HGMs) for hydrogen storage using urea as a blowing agent
 
Creator DALAI, S
VIJAYALAKSHMI, S
SHRIVASTAVA, P
SIVAM, SP
SHARMA, P
 
Subject Hydrogen storage
Hollow glass microspheres (HGMs)
Amber glass
Blowing agent
Flame spheroidisation
Urea
FABRICATION
SPECTROSCOPY
 
Description Hollow glass microspheres (HGMs) are unique class of porous material that can be used for hydrogen storage. They are finely dispersed and free flowing powder having microsphere diameter, 10-200 mu m and wall thickness, 0.5-2 mu m. In this report, we present the preparation of HGMs from glass frits using air-acetylene flame spheroidisation method. Urea was incorporated in the feed glass as a blowing agent to get porous walled HGMs. Effect of concentration of urea in the feed glass on the development of pores on HGMs wall was investigated. It was observed that, the porosity of the HGMS walls increased with the increase in urea content in the feed glass. Characterization of HGMs prepared was done using FE-SEM, ESEM, FTIR and XRD techniques. The spherical nature and the morphology of the HGMs samples prepared were confirmed using FE-SEM, while the pore diameter and the porosity of the samples was observed in the ESEM images. Hydrogen adsorption experiments were carried out at room temperature (RT) and 200 degrees C at 10 bar pressure, for 5 h for all the HGMs samples prepared. The HGMs prepared with 2% urea showed large number of micro/nano pores and it showed a hydrogen storage capacity of 2.3 wt.% at 200 degrees C and 10 bar pressure. The hydrogen adsorption on HGMs at RT and 10 bar pressure was lower than that observed at 200 degrees C and 10 bar pressure. (C) 2014 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-12-28T12:38:13Z
2014-12-28T12:38:13Z
2014
 
Type Article
 
Identifier MICROELECTRONIC ENGINEERING, 12665-70
0167-9317
1521-3757
http://dx.doi.org/10.1016/j.mee.2014.06.017
http://dspace.library.iitb.ac.in/jspui/handle/100/16561
 
Language English