Processing of mesoporous silica materials (MCM-41) from coal fly ash

Misran, H. and Singh, R. and Begum, S. and Yarmo, M.A. (2007) Processing of mesoporous silica materials (MCM-41) from coal fly ash. Journal of Materials Processing Technology, 186 (1-3). pp. 8-13.

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Mesoporous silica is an important material which has various industrial applications. Currently, it is produced from precursors that are costly. In this paper, the successful preparation of siliceous mesoporous materials MCM-41 with pores of ordered 2-dimensional hexagonal structure by condensation-polymerization using quaternary ammonium salt as structure directing agent and supernatant of the coal fly ash (CIA) as silica precursor is described. The synthesized materials had high surface area of 732 m(2)/g and median pore diameter of 2.5 nm. X-ray diffraction analyses revealed that fusion processes are important in extracting silica from quartz in CFA. SEM images of fused CIA revealed two different morphologies of agglomerated spheres attributable to the fused CFA and distorted octahedral grains to the faujasite phase in comparison to the cenospheres morphology of the as-received CFA. MCM-41 was also produced from pure silica source for comparison. The results obtained in the present work demonstrate the feasibility of employing coal fly ash as a potential source of silica to produce MCM-41 mesoporous materials. (c) 2006 Elsevier B.V. All rights reserved.

Item Type: Article
Additional Information: Times Cited: 19 Misran, Halina Singh, Ramesh Begum, Shahida Yarmo, Mohd Ambar --- you can e-mail to me for the full text of my jurnal at
Subjects: T Technology > TS Manufactures
Divisions: Faculty of Engineering
Depositing User: Mr. Mohammed Salim Abd Rahman
Date Deposited: 03 Jul 2013 02:10
Last Modified: 03 Jul 2013 02:10

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