Synthesis of ZSM-12 (MTW) with different Al-source: Towards understanding the effects of crystallization parameters

Mohammed Sanhoob, Oki Muraza, Zain H. Yamani, Eid M. Al-Mutairi, Teruoki Tago, Belabbes Merzougui, Takao Masuda

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The effect of synthesis parameters on morphology of ZSM-12 (MTW) zeolite with tetra ethyl ammonium bromide (TEABr) as an organic-structure directing agent was investigated systematically. Aluminum sulfate octahydrate (Al 2(SO4)3·18H2O) was used as an aluminum (Al) source. The Si/Al ratio was varied from 40 to 180 and alkalinity ratio (NaOH/Si) was set between 0.132 and 0.160. Effects of crystallization temperature and time were studied. The contribution of the aging period on the final morphology of ZSM-12 was investigated in the range of 1.5-6 h. Phase identification of as-synthesized ZSM-12 was confirmed by X-ray diffraction and morphology of crystals was studied by electron microscopy. The alkalinity was one of the most substantial factors that induced the formation of ZSM-5 (MFI) nuclei as a competing phase. Pure ZSM-12 was obtained with Si/Al of 80 at 145 °C. Different agglomeration shapes of ZSM-12 were observed by changing Si/Al ratio. Prolonged aging time up to 6 h induced the formation of ZSM-5 nuclei.

Original languageEnglish
Pages (from-to)31-37
Number of pages7
JournalMicroporous and Mesoporous Materials
Volume194
DOIs
Publication statusPublished - 2014
Externally publishedYes

Fingerprint

Crystallization
Aluminum
crystallization
aluminum
synthesis
alkalinity
Alkalinity
Aging of materials
Zeolites
ammonium bromides
nuclei
Electron microscopy
agglomeration
Agglomeration
sulfates
electron microscopy
X ray diffraction
Crystals
diffraction
crystals

Keywords

  • Al sources
  • Alkalinity
  • One-dimensional pore
  • Phase impurity
  • ZSM-12 (MTW)

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Synthesis of ZSM-12 (MTW) with different Al-source : Towards understanding the effects of crystallization parameters. / Sanhoob, Mohammed; Muraza, Oki; Yamani, Zain H.; Al-Mutairi, Eid M.; Tago, Teruoki; Merzougui, Belabbes; Masuda, Takao.

In: Microporous and Mesoporous Materials, Vol. 194, 2014, p. 31-37.

Research output: Contribution to journalArticle

Sanhoob, Mohammed ; Muraza, Oki ; Yamani, Zain H. ; Al-Mutairi, Eid M. ; Tago, Teruoki ; Merzougui, Belabbes ; Masuda, Takao. / Synthesis of ZSM-12 (MTW) with different Al-source : Towards understanding the effects of crystallization parameters. In: Microporous and Mesoporous Materials. 2014 ; Vol. 194. pp. 31-37.
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