Temperature effect on the quantitative analysis of CO2 concentration in water by in situ laser Raman spectroscopy: A preliminary study at temperatures between 20 and 150℃ and pressures up to 30 MPa
A laser Raman system was calibrated for quantitative analysis of CO2 dissolved in water at various pressure-temperature conditions. An aqueous solution containing 1.37 mol％ CO2 was prepared in a high-pressure optical cell, and in-situ Raman spectra were collected at 10.02 MPa and between 20 and 150℃.The peak area ratios between either one of the v1 (～1285 cm-1) and 2v2 (～1390 ca-1) CO2 bands or the sum of these two bands and the O-H stretching vibration band of H2O (～3400 cm-1) increase linearly with temperature.In-situ Raman spectra were also collected for an aqueous phase in equilibrium with a CO2 fluid phase between 20 and 100℃ and at pressures up to 30 MPa, and they show the similar temperature effect.
Wanjun Lu I.M.Chou R.C.Burruss
Faculty of Earth Resources, China University of Geosciences, Wuhan, China National Center, US Geological Survey, Reston, VA, USA
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
519-522
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）