Production of precipitated calcium carbonate from calcium silicates and carbon dioxide

Sebastian Teir*, Sanni Eloneva, Ron Zevenhoven

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

105 Citations (Scopus)

Abstract

The possibilities for reducing carbon dioxide emissions from the pulp and paper industry by calcium carbonation are presented. The current precipitated calcium carbonate (PCC) production uses mined, crushed calcium carbonate as raw materials. If calcium silicates were used instead, carbon dioxide emissions from the calcination of carbonates would be eliminated. In Finland, there could, thus, be a potential for eliminating 200 kt of carbon dioxide emissions per year, considering only the PCC used in the pulp and paper industry. A preliminary investigation of the feasibility to produce PCC from calcium silicates and the potential to replace calcium carbonate as the raw material was made. Calcium carbonate can be manufactured from calcium silicates by various methods, but only a few have been experimentally verified. The possibility and feasibility of these methods as a replacement for the current PCC production process was studied by thermodynamic equilibrium calculations using HSC software and process modelling using Aspen Plus®. The results from the process modelling showed that a process that uses acetic acid for extraction of the calcium ions is a high potential option for sequestering carbon dioxide by mineral carbonation. The main obstacle seems to be the limited availability and relatively high price of wollastonite, which is a mineral with high calcium silicate content. An alternative is to use the more common, but also more complex, basalt rock instead.

Original languageEnglish
Pages (from-to)2954-2979
Number of pages26
JournalEnergy Conversion and Management
Volume46
Issue number18-19
DOIs
Publication statusPublished - Nov 2005
MoE publication typeA1 Journal article-refereed

Keywords

  • Calcium carbonate
  • Calcium silicate
  • Carbon dioxide
  • Carbonation
  • PCC
  • Utilization

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