Hydrothermal solidification of diatomaceous earth with analcime formation

Ke Wu, Zhenzi Jing, Lili Pan, Lei Zhou, Emile Hideki Ishida

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Diatomaceous earth (DE) solidifies hydrothermally with analcime formation. With analcime formation, strength development was much greater than that with calcium silicate hydrate (CSH) formation. NaOH addition conditioned analcime formation because NaOH solution not only promoted dissolution of quartz and montmorillonite but also provided Na + to form the analcime. Curing temperature and time affected analcime formation, and, in this study, over 6 h (at 200 °C) and 175 °C (for 12 h), analcime seemed to form readily. After hydrothermal treatment, the skeletons of diatoms can still be seen in the solid after analcime formation but can hardly be found after CSH formation.

Original languageEnglish
Pages (from-to)1637-1646
Number of pages10
JournalResearch on Chemical Intermediates
Volume38
Issue number7
DOIs
Publication statusPublished - 2012 Sep 1

Keywords

  • Analcime
  • Calcium silicate hydrate (CSH)
  • Diatomaceous earth (DE)
  • Hydrothermal solidification
  • Zeolite

ASJC Scopus subject areas

  • Chemistry(all)

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