Sequestering CO2 by Mineralization into Useful Nesquehonite-Based Products

Fredrik Paul Glasser, Guillaume Jauffret, Jennie Morrison, Jose-Luis Galvez-Martos, Naomi Patterson, Mohammed Salah-Eldin Imbabi

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Abstract

The precipitation of magnesium hydroxy-carbonate hydrates has been suggested as a route to sequester CO2 into solids. We report the development of self-cementing compositions based on nesquehonite, MgCO3⋅3H2O, that are made from CO2-containing gas streams, the CO2 being separated from other gases by its high solubility in alkaline water, while magnesium is typically provided by waste desalination brines. Precipitation conditions are adjusted to optimize the formation of nesquehonite and the crystalline solid can readily be washed free of chloride. Products can be prepared to achieve self-cementation following two routes: (i) thermal activation of the nesquehonite then rehydration of the precursor or (ii) direct curing of a slurry of nesquehonite. The products thus obtained contain ~30 wt% CO2 and could form the basis for a new generation of lightweight, thermally insulating boards, blocks, and panels, with sufficient strength for general construction.
Original languageEnglish
Article number3
JournalFrontiers in Energy Research
Volume4
DOIs
Publication statusPublished - 11 Feb 2016

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Keywords

  • CO2 sequestration
  • desalination brines
  • mineralization
  • magnesium carbonates
  • construction products

Cite this

Glasser, F. P., Jauffret, G., Morrison, J., Galvez-Martos, J-L., Patterson, N., & Imbabi, M. S-E. (2016). Sequestering CO2 by Mineralization into Useful Nesquehonite-Based Products. Frontiers in Energy Research, 4, [3]. https://doi.org/10.3389/fenrg.2016.00003