钾长石—CO_2相互作用水热实验研究

Research on interactively hydrothermal experiment between potassium feldspar and CO_2

利用高压釜在不同温度下(100℃、125℃、150℃和175℃)开展了CO2-钾长石水热实验。通过扫描电镜、X--衍射技术及紫外分光光度计等对反应前后样品及溶液进行观察或测试,结果表明,随着温度的升高,钾长石溶蚀程度增加,150℃时在钾长石表面识别出新生的碳酸盐等矿物。这说明温度达到150℃时,CO2就能够以新生矿物的形式稳定固结在地层中,为CO2的地下封存提供了实验依据。

Experiments about potassium feldspar and CO2 under different temperatures （100℃,125℃,150℃ and 175℃） were carried out by means of autoclave technology.Through scanning electron microscopy,X-ray diffraction analysis and UV spectrophotometer,the samples and solution before and after the reaction were observed.The results showed that the corrosion intensity of potassium feldspar was gradually enhanced as the temperature increased.A newborn carbonate mineral was found on the surface of sample at 150℃,which indicated that the CO2 can be captured in the strata as the form of new mineral at 150℃,providing the basis for the CO2 underground storage.