Dissolution of altered tuffaceous rocks under conditions relevant for CO2 storage |
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| Institution: | 1. Frontier Research Center for Energy and Resources (FRCER), Graduate School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;2. Department of Systems Innovation, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;3. Frontier Research Center for Energy and Resources (FRCER), School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;2. PetroChina Tuha Oilfield Company, Hami 839009, China;1. Petroleum Engineering Department and Center of Petroleum and Minerals of the Research Institute, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia;2. Petroleum Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia in partnership with King Abdul-Aziz Center for Science and Technology-Technology Innovation Center on Carbon Capture and Sequestration, Dhahran, Saudi Arabia;1. Department of Earth & Planetary Sciences, Washington University in St. Louis, Campus Box 1190, One Brookings Drive, St. Louis, MO 63130, United States;2. Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, Campus Box 1180, One Brookings Drive, St. Louis, MO 63130, United States;3. Department of Chemistry, Washington University in St. Louis, Campus Box 1134, One Brookings Drive, St. Louis, MO 63130, United States;4. Department of Physics, Washington University in St. Louis, Campus Box 1105, One Brookings Drive, St. Louis, MO 63130, United States;1. Forestry College of Guangxi University, Nanning, Guangxi, 530004, China;2. College of Resources and Environment of Huazhong Agricultural University, Wuhan, Hubei, 430070, China;1. Géosciences Montpellier, Université de Montpellier, CNRS, Place Eugène Bataillon cc060, F-34095 Montpellier Cedex 5, France;2. Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris-Diderot, UMR 7154 CNRS, 75238 Paris, France;3. Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences, Moscow, Russia |
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| Abstract: | 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 1 MPa 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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