TY - JOUR
T1 - Reaction kinetics of CO2 carbonation with Mg-rich minerals
AU - Kwon, Soonchul
AU - Fan, Maohong
AU - Dacosta, Herbert F.M.
AU - Russell, Armistead G.
AU - Tsouris, Costas
PY - 2011/7/7
Y1 - 2011/7/7
N2 - Due to their low price, wide availability, and stability of the resulting carbonates, Mg-rich minerals are promising materials for carbonating CO 2. Direct carbonation of CO2 with Mg-rich minerals reported in this research for the first time could be considerably superior to conventional liquid extraction processes from an energy consumption perspective due to its avoidance of the use of a large amount of water with high specific heat capacity and latent heat of vaporization. Kinetic models of the reactions of the direct CO2 carbonation with Mg-rich minerals and within simulated flue gas environments are important to the scale-up of reactor designs. Unfortunately, such models have not been made available thus far. This research was initiated to fill that gap. Magnesium silicate (Mg 2SiO4), a representative compound in Mg-rich minerals, was used to study CO2 carbonation reaction kinetics under given simulated flue gas conditions. It was found that the chosen sorbent deactivation model fits well the experimental data collected under given conditions. A reaction order of 1 with respect to CO2 is obtained from experimental data. The Arrhenius form of CO2 carbonation with Mg 2SiO4 is established based on changes in the rate constants of the chosen deactivation model as a function of temperature.
AB - Due to their low price, wide availability, and stability of the resulting carbonates, Mg-rich minerals are promising materials for carbonating CO 2. Direct carbonation of CO2 with Mg-rich minerals reported in this research for the first time could be considerably superior to conventional liquid extraction processes from an energy consumption perspective due to its avoidance of the use of a large amount of water with high specific heat capacity and latent heat of vaporization. Kinetic models of the reactions of the direct CO2 carbonation with Mg-rich minerals and within simulated flue gas environments are important to the scale-up of reactor designs. Unfortunately, such models have not been made available thus far. This research was initiated to fill that gap. Magnesium silicate (Mg 2SiO4), a representative compound in Mg-rich minerals, was used to study CO2 carbonation reaction kinetics under given simulated flue gas conditions. It was found that the chosen sorbent deactivation model fits well the experimental data collected under given conditions. A reaction order of 1 with respect to CO2 is obtained from experimental data. The Arrhenius form of CO2 carbonation with Mg 2SiO4 is established based on changes in the rate constants of the chosen deactivation model as a function of temperature.
UR - http://www.scopus.com/inward/record.url?scp=79959808729&partnerID=8YFLogxK
U2 - 10.1021/jp2040899
DO - 10.1021/jp2040899
M3 - Article
AN - SCOPUS:79959808729
SN - 1089-5639
VL - 115
SP - 7638
EP - 7644
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
IS - 26
ER -