Enhancing process kinetics for mineral carbon sequestration

Samuel C. Krevor, Klaus Lackner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

53 Citations (Scopus)

Abstract

The current low-cost process for mineral carbonation involves the direct carbonation of a slurry of magnesium or calcium silicate mineral with supercritical CO 2. The process is currently limited by the slow reaction kinetics of the carbonation reactions, and in particular the slow dissolution rates of the silicates in weakly acidic conditions. Enhancing the dissolution rate in weakly acidic conditions has been identified as one of the main opportunities for lowering the costs of a direct mineral carbonation process. Serpentine has been identified by its reactivity and abundance as a potential mineral for use in a mineral carbonation process. In this paper we discuss the results of dissolution experiments in which ground serpentine was reacted in weakly acidic aqueous systems containing NH4Cl, NaCl,, sodium citrate, sodium EDTA, sodium oxalate, and sodium acetate. All experiments are carried out at 120  {ring operator}C and under 20 bars of CO 2 in a batch autoclave. It was found that the sodium salts of citrate, oxalate, and EDTA significantly enhance the dissolution of serpentine under weakly acidic conditions.

Original languageEnglish (US)
Title of host publicationEnergy Procedia
Pages4867-4871
Number of pages5
Volume1
Edition1
DOIs
StatePublished - Feb 2009
Externally publishedYes
Event9th International Conference on Greenhouse Gas Control Technologies, GHGT-9 - Washington DC, United States
Duration: Nov 16 2008Nov 20 2008

Other

Other9th International Conference on Greenhouse Gas Control Technologies, GHGT-9
CountryUnited States
CityWashington DC
Period11/16/0811/20/08

Fingerprint

Carbonation
Minerals
Sodium
Dissolution
Kinetics
Carbon
Ethylenediaminetetraacetic acid
Silicate minerals
Calcium silicate
Autoclaves
Reaction kinetics
Silicates
Magnesium
Costs
Experiments
Salts

Keywords

  • Acetate
  • Citrate
  • Mineral carbon sequestration
  • Organic salts
  • Oxalate
  • Serpentine dissolution

ASJC Scopus subject areas

  • Energy(all)

Cite this

Enhancing process kinetics for mineral carbon sequestration. / Krevor, Samuel C.; Lackner, Klaus.

Energy Procedia. Vol. 1 1. ed. 2009. p. 4867-4871.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Krevor, SC & Lackner, K 2009, Enhancing process kinetics for mineral carbon sequestration. in Energy Procedia. 1 edn, vol. 1, pp. 4867-4871, 9th International Conference on Greenhouse Gas Control Technologies, GHGT-9, Washington DC, United States, 11/16/08. https://doi.org/10.1016/j.egypro.2009.02.315
Krevor, Samuel C. ; Lackner, Klaus. / Enhancing process kinetics for mineral carbon sequestration. Energy Procedia. Vol. 1 1. ed. 2009. pp. 4867-4871
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