Influence of NaCl on mineral carbonation of CO 2 using cement material in aqueous solutions

Hwanju Jo, Young Nam Jang, Ho Young Jo

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The carbonation of cement materials in NaCl solution was evaluated at various NaCl concentrations (0-2.0M). Leaching and carbonation tests were conducted on slurry-mixed ordinary Portland cement (OPC) with NaCl solutions at a solid to liquid ratio of 50g/l in a Teflon reactor under ambient temperature and pressure conditions. After 24-h leaching, the pH of the slurry decreased with increasing NaCl concentration, whereas the Ca concentration slightly increased. The C-S-H content in the reacted samples after 24-h leaching increased in the presence of NaCl. After the carbonation tests, the CaCO 3 content in the reacted samples increased by 7.5-18.4wt%, whereas the C-S-H content decreased by 7.1-33.0wt% in the NaCl solutions. The particle size of the precipitated CaCO 3 appeared to be decreased as the NaCl concentration was increased to 1M, but increased as the NaCl concentration was further increased to 2M.

Original languageEnglish
Pages (from-to)232-241
Number of pages10
JournalChemical Engineering Science
Volume80
DOIs
Publication statusPublished - 2012 Oct 1

Keywords

  • Carbon dioxide
  • Carbonation
  • Cementitious materials
  • Leaching
  • Sequestration
  • Sodium chloride

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Applied Mathematics
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Influence of NaCl on mineral carbonation of CO <sub>2</sub> using cement material in aqueous solutions'. Together they form a unique fingerprint.

  • Cite this