Single step solid-state fusion for MgAl2O4 spinel synthesis and its influence on the structural and textural properties

Norhasyimi Rahmat, Zahira Yaakob, Manoj Pudukudy, Norazah Abdul Rahman, Seri Suriani Jahaya

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Magnesium aluminate (MgAl2O4) spinel nanostructure has been synthesized using a single step solid-state fusion method, with citric acid as a surfactant. The samples prepared at different annealing conditions such as temperature and duration, were analyzed to study their effects on the structural, crystalline and textural properties of MgAl2O4 spinel, such as specific surface area, morphology, crystallite size and agglomeration. The prepared samples were characterized using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Increasing the annealing duration has insignificant influence on the crystallinity and the formation of spinel phase. However, with increasing annealing temperature, significant effects were observed, namely, decreasing specific surface area, increasing pore size and crystallite size, and increasing degree of agglomeration. Samples prepared at different annealing temperatures were then tested for catalytic methane steam reforming to understand their catalytic properties. It was found that the MgAl2O4 spinel with high surface area and small crystallite size showed good catalytic activity at 700 °C, with a steam to carbon ratio of 2.

Original languageEnglish
Pages (from-to)409-419
Number of pages11
JournalPowder Technology
Volume329
DOIs
Publication statusPublished - 15 Apr 2018

Fingerprint

Fusion reactions
Crystallite size
Annealing
Specific surface area
Agglomeration
Steam reforming
Citric acid
Field emission
Thermal effects
Pore size
Fourier transform infrared spectroscopy
Magnesium
Thermogravimetric analysis
Nanostructures
Catalyst activity
Surface active agents
Steam
Crystalline materials
Transmission electron microscopy
X ray diffraction

Keywords

  • Annealing effects
  • Magnesium aluminate
  • Mixed oxides
  • Solid-state citrate fusion
  • Spinel

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Single step solid-state fusion for MgAl2O4 spinel synthesis and its influence on the structural and textural properties. / Rahmat, Norhasyimi; Yaakob, Zahira; Pudukudy, Manoj; Rahman, Norazah Abdul; Jahaya, Seri Suriani.

In: Powder Technology, Vol. 329, 15.04.2018, p. 409-419.

Research output: Contribution to journalArticle

Rahmat, Norhasyimi ; Yaakob, Zahira ; Pudukudy, Manoj ; Rahman, Norazah Abdul ; Jahaya, Seri Suriani. / Single step solid-state fusion for MgAl2O4 spinel synthesis and its influence on the structural and textural properties. In: Powder Technology. 2018 ; Vol. 329. pp. 409-419.
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