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Functionalized Fly Ash Based Alumino-Silicates for Capture of Carbon Dioxide

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Title Functionalized Fly Ash Based Alumino-Silicates for Capture of
Carbon Dioxide
 
Creator Kumar, Vivek
Labhsetwar, Nitin
Meshram, Siddharth
Rayalu, Sadhana
 
Subject Materials Science
 
Description Fly ash contains mainly alumina and silica as its main constituents. A novel method for the extraction of highly stable
alumino-silicates from fly ash has been developed. The as-extracted alumino-silicate has been further functionalized with APTES
((3-aminopropyl)triethoxysilane), TRIS buffer (tris(hydroxymethyl)aminomethane), and AMP (3-amino-2-methyl-1-propanol)
to impart basicity for carbon dioxide adsorption. A dynamic adsorption capacity of 6.62 mg/g has been observed for FAS (fly ash
based alumino-silicate) and has improved by a factor of 4.0, with an adsorption capacity of 26.5 mg/g for AMP-functionalized FAS at
55 �C with 15% CO2 inN2. The positive influence of water was observed with an improvement of adsorption capacity to 34.82 mg/g
at 55 �C with 15% CO2, 82% N2, and 3% water vapor. The adsorbent is studied for adsorption capacity at varying temperatures, and
the best performing adsorbent is characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier
transform infrared (FTIR) spectroscopy, thermal analysis, and elemental analysis to study the morphological properties of the
present adsorbent support. The excellent thermal stability of synthesized material suggested the formation of promising aluminosilicate
for CO2 adsorption.
 
Publisher American Chemical Society
 
Date 2011-09-08
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1023/1/10.1021%40ef201212h.pdf
Kumar, Vivek and Labhsetwar, Nitin and Meshram, Siddharth and Rayalu, Sadhana (2011) Functionalized Fly Ash Based Alumino-Silicates for Capture of Carbon Dioxide. Energy & Fuels, 25. pp. 4854-4861. ISSN 0887-0624
 
Relation http://neeri.csircentral.net/1023/