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Precipitated Silica from Wheat Husk

Author(s)
S. H. Javed University of Engineering and Technology, Lahore, Pakistan
S Anam University of Engineering and Technology, Lahore, Pakistan
A Umair University of Engineering and Technology, Lahore, Pakistan
S Tajwar University of Engineering and Technology, Lahore, Pakistan
Abstract
In present investigation extraction of amorphous silica from wheat husk and then converting it into precipitated silica by using sodium hydroxide has been studied at various Na/Si ratios and reaction time. Wheat husk was calcined in electric tube furnace at 500 OC for two hours to produce wheat husk ash (WHA). XRD of WHA confirmed its amorphous nature. The WHA was treated against sodium hydroxide at different molar ratios and reaction time to obtain sodium meta silicate. Each time sodium meta silicate was treated against 0.1N HCl to recover silica in precipitated form. XRD and FTIR results confirmed the amorphous nature of precipitated silica. It was also observed that one hour boiling with molar ratio Na/Si =2 is sufficient for optimum conversion into sodium meta silicate.
Publication Details
Page(s) 51-54
DOI DOI not available
Published Journal: Journal of Pakistan Institute of Chemical Engineers, Volume: 39, Issue: 1, Year: 2011

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