Co-utilization of CO2 and calcium silicate-rich slags for Precipitated calcium carbonate production (Part I)

Sebastian Teir*, Sanni Eloneva, Ron Zevenhoven

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedingConference contributionScientificpeer-review

11 Citations (Scopus)

Abstract

A promising option for long-term storage of CO2 is to fixate carbon dioxide as carbonates in minerals. Slag from iron and steel works is a potential raw material for carbonation due to its high content of calcium silicates. Carbonation of calcium silicates produces calcium carbonate (CaCO3), which is used as filler and coating materials in paper. Precipitated calcium carbonate (PCC) is currently produced by carbonating burned lime. If calcium silicate-rich slag materials are used instead of limestone for producing PCC, considerable energy savings and carbon dioxide emissions reductions could be achieved. A suitable process utilizing acetic acid for producing calcium carbonates from calcium silicates was identified. The option for fixating carbon dioxide with calcium silicate-rich slag using acetic acid as reaction intermediate and solvent was investigated using process modeling and laboratory-scale batch experiments. Using this process, 0.24 t of CO2 could theoretically be captured and stored per ton of iron and steel slag products carbonated, while the world-wide CO2 storage potential was estimated to be 62-83 Mt/a. The experiments showed that the calcium in iron and steel slags easily dissolve in acetic acid.

Original languageEnglish
Title of host publicationECOS 2005 - Proceedings of the 18th International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems
EditorsGeorge Tsatsaronis, Johan E. Hustad, Truls Gundersen, Audun Rosjorde, Signe Kjelstrup
PublisherTapir Academic Press
Pages749-756
Number of pages8
ISBN (Electronic)8251920418
Publication statusPublished - 2005
MoE publication typeA4 Article in a conference publication
Event18th International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems, ECOS 2005 - Trondheim, Norway
Duration: 20 Jun 200522 Jun 2005

Publication series

NameECOS 2005 - Proceedings of the 18th International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems

Conference

Conference18th International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems, ECOS 2005
CountryNorway
CityTrondheim
Period20/06/0522/06/05

Keywords

  • Calcium carbonate
  • Calcium silicate
  • CO storage
  • CO utilization
  • Mineral carbonation
  • Slag

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