TY - JOUR
T1 - Dissolution of altered tuffaceous rocks under conditions relevant for CO2 storage
AU - Takaya, Yutaro
AU - Nakamura, Kentaro
AU - Kato, Yasuhiro
N1 - Funding Information:
This work was financially supported by JSPS Grant-in-Aid for Young Scientists (B) No. 25820432 and JSPS Grant-in-Aid for JSPS Fellows No. 14J09158 to Y.T. and by JSPS Grant-in-Aid for Scientific Research (S) No. 22226015 to Y.K. We thank the editor and anonymous reviewer for their constructive comments, which helped to improve this manuscript.
Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - We conducted CO2-water-rock interaction experiments to elucidate the dissolution characteristics and geochemical trapping potential of three different altered andesitic to rhyolitic tuffaceous rocks (Tsugawa, Ushikiri and Daijima tuffaceous rock) relative to fresh mid-ocean ridge basalt. The experiments were performed under 1MPa CO2 pressure to reproduce the water-rock-CO2 interactions in CO2 storage situations. Basalt showed high acid neutralization potential and rapid dissolution of silicate minerals. Two of the tuffaceous rocks (Ushikiri and Daijima) showed relatively high solubility trapping potential, mainly due to the dissolution of carbonate minerals in the andesitic Ushikiri tuffaceous rock and the ion-exchange reaction with zeolite minerals in the rhyolitic Daijima tuffaceous rock. The mineral trapping potential of the Ushikiri tuffaceous rock was found to be relatively high, due to the rapid dissolution of Mg- and Ca-bearing silicate minerals. Our experimental results suggest that regions of porous and andesitic tuffaceous rock hold global promise as CO2 storage sites.
AB - We conducted CO2-water-rock interaction experiments to elucidate the dissolution characteristics and geochemical trapping potential of three different altered andesitic to rhyolitic tuffaceous rocks (Tsugawa, Ushikiri and Daijima tuffaceous rock) relative to fresh mid-ocean ridge basalt. The experiments were performed under 1MPa CO2 pressure to reproduce the water-rock-CO2 interactions in CO2 storage situations. Basalt showed high acid neutralization potential and rapid dissolution of silicate minerals. Two of the tuffaceous rocks (Ushikiri and Daijima) showed relatively high solubility trapping potential, mainly due to the dissolution of carbonate minerals in the andesitic Ushikiri tuffaceous rock and the ion-exchange reaction with zeolite minerals in the rhyolitic Daijima tuffaceous rock. The mineral trapping potential of the Ushikiri tuffaceous rock was found to be relatively high, due to the rapid dissolution of Mg- and Ca-bearing silicate minerals. Our experimental results suggest that regions of porous and andesitic tuffaceous rock hold global promise as CO2 storage sites.
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U2 - 10.1016/j.apgeochem.2015.03.012
DO - 10.1016/j.apgeochem.2015.03.012
M3 - Article
AN - SCOPUS:84927928575
SN - 0883-2927
VL - 58
SP - 78
EP - 87
JO - Applied Geochemistry
JF - Applied Geochemistry
ER -