%0 Conference Proceedings %T Thermodynamic study of several hydrates in dispersed systems using Differential Scanning Calorimetry %+ Unité de Chimie et Procédés (UCP) %+ Transformation Intégrée de la Matière Renouvelable (TIMR) %A Dalmazzone, Didier %A Kharrat, Mamdouh %A Clausse, Danièle %A Fouconnier, Benoît %< avec comité de lecture %B 4th International Conference on Gas Hydrates %C Yokohama, Japan %3 Proceedings of the 4th International Conference on Gas Hydrates %8 2002-05-19 %D 2002 %Z Engineering Sciences [physics]/Chemical and Process Engineering %Z Chemical Sciences/Chemical engineering %Z Chemical Sciences/Theoretical and/or physical chemistryConference papers %X Differential Scanning Calorimetry (D.S.C.) was used to determine the temperature stability conditionsat atmospheric pressure of trichlorofluoromethane hydrate in water-in-oil emulsions in which the waterphase contained from 7 to 27 wt.% of calcium chloride, and the temperature stability conditions atpressures ranging from 5 to 12 MPa of hydrates of methane and natural gas, in solutions and water-in-oilemulsions in which the water phase contained either sodium chloride at a concentration of 17 wt.%., orcalcium chloride at a concentration of 23 wt.%. The influence of repeated cycles of natural gas hydrateformation and dissociation on the stability of the emulsion was evidenced on a real oil-based drillingfluid.It was found that D.S.C. is a fast, easy to use and precise alternate method of determination ofhydrates stability conditions. Comparing the results with literature data, when available, showed verygood agreement. This technique can be applied to virtually any kind of mixture containing water, evenvery complex fluids containing several solid phases suspended in a multiphasic liquid, such as drillingfluids, for which the use of the PVT technique is particularly uneasy. %G English %L hal-01215695 %U https://ensta-paris.hal.science/hal-01215695 %~ ENSTA %~ UNIV-COMPIEGNE %~ ENSTA_UCP %~ TIMR %~ ALLIANCE-SU