Hydrothermal synthesis of mesoporous materials from diatomaceous earth

Zhenzi Jing, Hirotaka Maeda, Koji Loku, Emile H. Ishida

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Hydrothermal synthesis of mesoporous materials from diatomaceous earth has been carried out under saturated steam pressure (0.2-1.56 MPa) at 393-473 K for up to 72 h by slaked lime introduction. During the hydrothermal synthesis process, calcium silicate hydrate (CSH) was among the first phase formed and invariably appeared before tobermorite. The CSH formation seemed to exert a positive effect on the strength development and pore size evolution initially; whilst the tobermorite formation appeared to further enhance the strength and narrow the pore size. With curing at 473 K for 18 h, both of the strength and pore size distribution tended to reach optimal at which the pore size distribution also ranges between mesoporous area (2-50 nm in diameter). The highest strength seemed to coincide with the finest pore size distribution of the synthesized porous material during hydrothermal processing in this study.

Original languageEnglish
Pages (from-to)2114-2122
Number of pages9
JournalAIChE Journal
Volume53
Issue number8
DOIs
Publication statusPublished - 2007 Aug 1
Externally publishedYes

Keywords

  • Diatomaceous earth
  • Hydrothermal synthesis
  • Mesoporous materials
  • Pore distribution
  • Tensile strength

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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