|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|1742842||1521974||2016||8 صفحه PDF||سفارش دهید||دانلود رایگان|
• A batch reactor is equipped with Raman probes to measure solubilities of CO2–H2O.
• Both the solubilities of CO2 in H2O and of H2O in CO2 are measured at 65 and 100 °C.
• The results are provided with an accuracy of a few % between 40 bar and 200 bar.
The solubility control in the H2O–CO2 system under high pressure is of prime interest in numerous geochemical systems from hydrothermal fluids to CO2 geological storage. However, the number of experimental data is scarce in the range of interest of geological storage, especially in the CO2-rich phase. A new experimental device was built to measure mutual solubility in the CO2–H2O system without sampling by coupling a batch reactor with Raman immersion probes. The system was first calibrated by measuring the solubility of CO2 in water at 100 °C. The results were provided with an accuracy of a few % between 40 bar and 200 bar and in agreement with other published experimental data sets and models. The linear correlation between Raman peak intensity and CO2 solubility in the aqueous phase was then used to provide new experimental data of CO2 solubility in water at 65 °C from 3 bar to 200 bar. The Raman data of the CO2-rich phase or supercritical phase are compared to a thermodynamic models and the few experimental data available in literature to provide a new data set of H2O–CO2 mutual solubility at 100 °C and up to 200 bar.
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Journal: International Journal of Greenhouse Gas Control - Volume 47, April 2016, Pages 63–70