CO2 fixation using magnesium silicate minerals. Part 2: Energy efficiency and integration with iron-and steelmaking

Inês Romão, Experience Nduagu, Johan Fagerlund, Licínio M. Gando-Ferreira, Ron Zevenhoven*

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    42 Citations (Scopus)

    Abstract

    Mineral carbonation presents itself as the most promising method to sequester CO2 in Finland. A staged process for CO2 mineralisation, using magnesium silicates, is being intensively developed at åbo Akademi. A process energy analysis is made based on the most energy intensive steps, i.e. the heat treatment of the magnesium silicate rock and the carbonation reaction. Aspen Plus® software was used to model the process and pinch and exergy analyses were performed to acquire information on process layout for optimal heat recovery and integration. The simulations allow for concluding that the fixation of 1 kg of CO2 requires 3.04 MJ and 3.1 kg of serpentinite mineral rock. Additionally, the process gives considerable amounts of FeOOH and Ca(OH)2 as by-products making the integration of mineral carbonation with the steelmaking industry a very attractive opportunity to reduce CO2 emissions and raw materials inputs.

    Original languageEnglish
    Pages (from-to)203-211
    Number of pages9
    JournalEnergy
    Volume41
    Issue number1
    DOIs
    Publication statusPublished - May 2012
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Exergy analysis
    • Mineral carbonation
    • Pinch analysis
    • Process energy efficiency
    • Steelmaking

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