Enhancing process kinetics for mineral carbon sequestration

Samuel C. Krevor, Klaus Lackner

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

54 Scopus citations

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

Keywords

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

ASJC Scopus subject areas

  • Energy(all)

Fingerprint Dive into the research topics of 'Enhancing process kinetics for mineral carbon sequestration'. Together they form a unique fingerprint.

  • Cite this