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CO2地质封存是控制全球CO2净排放量的有效手段.自然界存在大量基性、超基性岩石的碳酸盐风化作用,与CO2反应生成稳定的碳酸盐矿物.影响基性、超基性岩石与CO2反应速率的因素有温度、压力、pH值、流体流动速率以及与矿物接触的表面积等.矿物在反应过程中放热可以使碳酸盐化体系进入自我加热的良性循环,同时控制流体的流动速率可以保持最佳温度并使反应速率最大化.蛇绿岩中的橄榄岩、大陆玄武岩和深海玄武岩在地球表层广泛分布,可贮存大量CO2.目前研究表明此方法在技术上可行,经济成本上有优势.因此,基性、超基性岩石具有封存CO2的巨大潜力,可以作为地质封存CO2的新途径.
Geological sequestration of CO2 is an effective means of controlling the global net CO2 emission.A large number of carbonate rocks of basic and ultrabasic rocks are naturally weathered by weathering and react with CO2 to form stable carbonate minerals that affect basic and ultrabasic rocks The rate of CO2 reaction with temperature, pressure, pH, fluid flow rate and the contact with the mineral surface area, etc. Mineral exothermic reaction can make the carbonation system into a virtuous circle of self-heating, while controlling the fluid The flow rate can maintain the optimum temperature and maximize the reaction rate.The peridotites, continental basalts and deep-sea basalts in the ophiolites are widely distributed on the Earth’s surface and can store large amounts of CO2.Researches show that this method is technically feasible and economical Therefore, the basic, ultrabasic rocks have great potential of sealing CO2, which can be used as a new way of geological storage of CO2.