二氧化碳的地质存储.ppt

1、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 CO2.,Geological storage Biological storage Marine storage,carbon dioxide geologica

2、l 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 undergr

3、ound 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 CO2. density is high enough (500 to 700 kg/m3) to limit the storage volume required. Safe storage of CO2. in a geologic formation requires a good rese

4、rvoir with adequate porosity and permeability and thick,for impermeable cap rocks that will prevent the CO2. from escaping.,salt water layer,The 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 a

5、quifer containing potable ground water, the including CO2. 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 st

6、oring 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.

7、 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 stora