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

Halina Misran, Ramesh Singh, Shahida Begum, Mohd Ambar Yarmo

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

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 (CFA) as silica precursor is described. The synthesized materials had high surface area of 732 m2/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 CFA 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.

Original languageEnglish
Pages (from-to)8-13
Number of pages6
JournalJournal of Materials Processing Technology
Volume186
Issue number1-3
DOIs
Publication statusPublished - 07 May 2007

Fingerprint

Coal Ash
Coal
Multicarrier modulation
Silica
Fly ash
Silicon Dioxide
Processing
Mesoporous materials
Precursor
Ammonium
Polymerization
Industrial Application
Surface area
Quartz
Condensation
X-ray Diffraction
Salt
Hexagon
Polycondensation
Preparation

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

Cite this

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Processing of mesoporous silica materials (MCM-41) from coal fly ash. / Misran, Halina; Singh, Ramesh; Begum, Shahida; Yarmo, Mohd Ambar.

In: Journal of Materials Processing Technology, Vol. 186, No. 1-3, 07.05.2007, p. 8-13.

Research output: Contribution to journalArticle

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