Variations in Permeability and Mechanical Properties of Basaltic Rocks Induced by Carbon Mineralization

Zhenni Ye (), Xiaoli Liu (), Huan Sun, Qinxi Dong, Weisheng Du and Qijian Long
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Zhenni Ye: School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China
Xiaoli Liu: State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
Huan Sun: School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China
Qinxi Dong: School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China
Weisheng Du: Deep Mining and Rock Burst Research Branch, Chinese Institute of Coal Science, Beijing 100013, China
Qijian Long: School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China

Sustainability, 2022, vol. 14, issue 22, 1-18

Abstract: Carbon capture, utilization, and storage (CCUS/CCS) is a strategic choice for ensuring energy security and reducing carbon dioxide emissions across the globe. The injection of CO 2 into the basaltic reservoir is one strategy for the permanent disposal of carbon emissions. Basaltic rocks, which are widely distributed in Hainan Island, are capable of CO 2 geological sequestration. In this study, the reaction of CO 2 -NaOH/Ca(OH) 2 -basaltic rocks under conditions of 6.0 M Pa and 30 °C was performed using basaltic samples collected from the Fushan area of the Hainan Province to evaluate the sequestration of CO 2 in basalt by mineralization. Then, the effect of CO 2 mineralization on the permeability and mechanical properties of basaltic rocks was evaluated using X-ray computer tomography and triaxial compression testing at 21.0 MPa. In addition, microwave technology was used to irradiate the basaltic rocks before mineralization. Changes in the permeability of basalt before and after mineralization and microwave irradiation were simulated numerically, and their effects on the mechanical strength deterioration of basalt were analyzed according to the rock mechanics using triaxial testing. Based on these results, a new method for the induction of basalt deterioration, mineralization, CO 2 injectivity, and storage capacity using microwave irradiation is proposed for use in CCUS/CCS engineering.

Keywords: basaltic rocks; absolute permeability; rock strength; carbon mineralization; microwave irradiation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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