CAJ | 학술논문

实施 CO2补集与地质封存是目前降低大气中 CO2含量、减轻温室效应的有效途径。在所能利用的封存方式中， CO2矿化封存最为安全、稳定。在能实施矿化封存的岩石介质中，玄武岩封存潜力巨大，且岩石溶解反应过程是矿化沉淀过程的基础；因此，研究玄武岩溶解反应速率十分必要。在构成玄武岩的单一矿物与缓冲溶剂的反应速率模型的基础上，提出不同温度下玄武岩样品在超临界 CO2水溶液中的溶解速率模型，并通过室内实验，利用采自山东省临朐县的玄武岩岩心样品，在45～100℃、10 MPa 条件下，与超临界 CO2-纯水反应，并运用最小二乘法确定模型中相关参数。同时利用57℃、72℃、92℃3个温度下的模型计算值与实验值对模型进行验证，结果证明了模型的准确性和可靠性，研究结果可直接应用于 CO2地质封存条件下玄武岩溶解速率的计算。
실시 CO2보집여지질봉존시목전강저대기중 CO2함량、감경온실효응적유효도경。재소능이용적봉존방식중， CO2광화봉존최위안전、은정。재능실시광화봉존적암석개질중，현무암봉존잠력거대，차암석용해반응과정시광화침정과정적기출；인차，연구현무암용해반응속솔십분필요。재구성현무암적단일광물여완충용제적반응속솔모형적기출상，제출불동온도하현무암양품재초림계 CO2수용액중적용해속솔모형，병통과실내실험，이용채자산동성림구현적현무암암심양품，재45～100℃、10 MPa 조건하，여초림계 CO2-순수반응，병운용최소이승법학정모형중상관삼수。동시이용57℃、72℃、92℃3개온도하적모형계산치여실험치대모형진행험증，결과증명료모형적준학성화가고성，연구결과가직접응용우 CO2지질봉존조건하현무암용해속솔적계산。
Implementation of CO2 capture and sequestration has currently been proposed as an effective way to reduce CO2 emissions and alleviate greenhouse effect.CO2 mineral sequestration is the most secure and stable way among all the geological storage types and basalt has been identified as a potential host formation.Moreo-ver,the process of rock dissolution is the basis of mineral precipitation and CO2 mineral sequestration.There-fore,it is necessary to study the dissolution rate of basalt.Previous researches concentrate on rate models for individual primary minerals in basalts under buffer solution.In this paper,we propose a dissolution rate model of basalt in supercritical CO2 solution under different temperatures.The basalt samples used in the experiments were taken from Linqu County,Shandong Province.The laboratory experiments were conducted under a range of temperatures (45 -100 ℃)and 10 MPa.The related parameters in the model were calculated through least square method.Model verification were conducted using the model predicted value and experimental value under 57 ℃,72 ℃,92 ℃,respectively.Results show that the model is accurate and reliable,which can be directly applied for calculating basalt dissolution rate under CO2 geological sequestration conditions.