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 language | English (US) |
|---|---|
| Title of host publication | Energy Procedia |
| Pages | 4867-4871 |
| Number of pages | 5 |
| Volume | 1 |
| Edition | 1 |
| DOIs | |
| State | Published - Feb 2009 |
| Externally published | Yes |
| Event | 9th International Conference on Greenhouse Gas Control Technologies, GHGT-9 - Washington DC, United States Duration: Nov 16 2008 → Nov 20 2008 |
Other
| Other | 9th International Conference on Greenhouse Gas Control Technologies, GHGT-9 |
|---|---|
| Country | United States |
| City | Washington DC |
| Period | 11/16/08 → 11/20/08 |
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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 proceeding › Conference contribution
}
TY - GEN
T1 - Enhancing process kinetics for mineral carbon sequestration
AU - Krevor, Samuel C.
AU - Lackner, Klaus
PY - 2009/2
Y1 - 2009/2
N2 - 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.
AB - 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.
KW - Acetate
KW - Citrate
KW - Mineral carbon sequestration
KW - Organic salts
KW - Oxalate
KW - Serpentine dissolution
UR - http://www.scopus.com/inward/record.url?scp=67650161909&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=67650161909&partnerID=8YFLogxK
U2 - 10.1016/j.egypro.2009.02.315
DO - 10.1016/j.egypro.2009.02.315
M3 - Conference contribution
VL - 1
SP - 4867
EP - 4871
BT - Energy Procedia
ER -