二氧化碳的地质存储.ppt

,*,Reduce carbon dioxide into the atmosphere emissions,The battle to reduce greenhouse gas emissions and prevent the most,dangerous consequences of climate change will be waged across multiple fronts,.,Three ways of store CO,2,.,Geological storage,Biological storage,Marine,storage,carbon dioxide geological storage,According to the related research,three types of geological structure can be used for carbon dioxide geological storage:oil and gas reservoir,salt water layer and coal seam doesnt mined.In each type,the way to sealed carbon dioxide is compressed it into liquid and injected into underground rock structure.,oil and gas reservoir,The way of oil and gas reservoir storage,The best choices will be at depths below 800 to 1000 m,where the CO,2,.density is high enough(500 to 700 kg/m3)to limit the storage volume required.Safe storage of CO,2,.in a geologic formation requires a good reservoir with adequate porosity and permeability and,thick,for,impermeable cap rocks that will prevent the CO,2,.from escaping.,salt water layer,Th,e,mechanism,of,salt water layer storage,referred,to as solubility trapping.,If carbon dioxide stored in deep saline aquifers were to leak into an overlying,aquifer containing potable ground water,the including CO,2,.would change the geochemical conditions and cause secondary effect induced by changes in pH,.,coal seam doesnt mined,Hypothesis the coal bed has sufficient permeability and the coal,seam doesnt mined,then the coal bed may also be used for storing carbon,while storage of carbon dioxide there may also improve the rate of coal seam mining methane,because the,coal seams,adsorption rate to carbon is far higher than methane,.,Mineralization reaction of Carbon dioxide,Choose desulfurization gypsum as the reactant to deposited carbon dioxide.,Using NaOH to adjust the pH can promote solid deposit,and as the pH increases,fixed amount increase too.,With this method can permanently sealed carbon dioxide,The problem of storage carbon dioxide,The probability that storage of carbon dioxide,in deep geologic formations will become an important climate change mitigation strategy,depends on a number of factors,namely,；,public acceptance,the cost of geologic storage compared to other climate change mitigation options,the availability,capacity,and location of suitable sites.,