||Experimental determination of barite solubility in the ternary system NaCl-BaSO4-H2O at high Temperatures and high Pressures.
||Thomsen, Kaj (Center for Phase Equilibria and Separation Processes, Department of Chemical Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
||Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
||The aim this project is the experimental determination of barite (BaSO4)solubility in the ternary system NaCl-BaSO4-H2O. As there are few sources dealing with high temperature (HT) and high pressure (HP), the conditions chosen focussed this situation. The analytical technique used to determine the final concentration of the collected samples was ICP-MS (Inductively Coupled Plasma- Mass Spectrometry).
The solubility results obtained after analysing three times (twice at DTU’s Lab and one time in an independent Lab) showed to be inconsistent. For the same samples
three different values were achieved. The reason for this inconsistency might be the analytical method. If the detection limit of the ICP-MS is higher than the real
concentration then the final are different and the values can’t be trustable.
To check if the experimental apparatus was able to determine the solubility at HT/HP it was performed some experiments with aqueous solution of Sodium Chloride
and compared with available data. At 30 ºC and varying pressure the results were coincident with the ones found in literature. At 100 ºC it was not possible to compare as
at high pressure there were no data. The shape of the results was similar to the one at 30 ºC. At 500 bar the solubility increased, but no conclusion could be made because the results were too scattered.
Despite some deviations on the results one can conclude that the set-up is able to determine the solubility of Sodium Chloride at high temperature and high pressure.
Creation date: 2006-06-22
Update date: 2012-12-13