Basalt mineralization storage technology is an important method in the field of CO2 geological storage,and it is one of the mostpromising technologies to achieve safe carbon sequestration,which can be used as an important component of large-scale CO2 emissionreduction. In this study,natural basalt samples from Yangpu,Haikou and Zhangzhou in Hainan Province were collected,and the effects ofdifferent temperatures and reaction times on the reaction efficiency of basalt mineralization were explored by high-temperature and high-pressure mineralization reaction experiments, and the rock and solution samples before and after the mineralization reaction wereanalyzed by characterization techniques such as XRD,XRF,ICP,SEM-EDS and CT-scan. The experimental results show that the reactionefficiency of basalt mineralization increases with the increase of temperature and the extension of reaction time,and the reaction processfollows a typical dissolution-precipitation mechanism. Among them, the mineralization effect of the samples in Hainan is moresignificant,which is suitable for large-scale mineralization and storage practice. In addition,based on the experimental data of indoormineralization,a more reasonable formula for assessing the storage potential is constructed,and the storage potential is evaluated bytaking Hainan as an example,and the results show that the basalt in Hainan has a large carbon sequestration potential,and the potentialevaluation method has high credibility and applicability. This study provides an important theoretical basis for the development of basaltmineralization storage projects,in order to promote the development of CO2 mineralization storage technology.

包琦(1999—),男,辽宁阜新人,硕士研究生。E-mail:1205901221@qq.com

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BAO Qi, ZHAO Wentao, WANG Chunkai, et al. Enhanced CO2 mineralization reaction efficiency and evaluation of storage potential in basalt geology[J].Clean Coal Technology,2024,30(10):111−120.