The apparatus manufactured by a French company ROP is designed to accurately measure the fluid saturation pressures, i.e., dew and bubble points at pressures up to 700 bar and temperatures from –5 to 150°C.
The currently available operational pressure conditions can also be extended to, for e.g., fluid studies at subatmospheric conditions by changing the pressure transducer.
Detailed description
The 80 ml equilibrium cell is housed in a thermostatic enclosure, in which a high-speed fan provides efficient circulation of air in order to achieve stable isothermal conditions.
A mechanically driven piston varies the internal volume of the cell. Viton ‘O’ rings placed on Teflon seats mounted in the grooves of the piston maintain the pressure integrity of the equilibrium cell.
A small magnetic stirrer placed on the piston is used to enhance the sample homogeneity. Moreover, the housing of the entire apparatus in a rocking cage permits additional equilibration of the sample. A high-precision Pt-100 thermocouple and a SEDEME pressure transducer measure the cell temperature and pressure respectively.
The accurate detection of phase boundaries is achieved via the extrinsic fiber optic sensors mounted in the cell cover.
A beam of light (red light 660 nm wavelength), launched through a bunch of optical fibers is incident upon a 45° sapphire roof prism surrounded by the fluid in the cell. The returned signal of the red light, which is a function of the fiber geometry.
About
The apparatus manufactured by a French company ROP is designed to accurately measure the fluid saturation pressures, i.e., dew and bubble points at pressures up to 700 bar and temperatures from –5 to 150°C. The currently available operational pressure conditions can also be extended to, for e.g., fluid studies at subatmospheric conditions by changing the pressure transducer.
Further information
The 80 ml equilibrium cell is housed in a thermostatic enclosure, in which a high-speed fan provides efficient circulation of air in order to achieve stable isothermal conditions. A mechanically driven piston varies the internal volume of the cell.
Viton ‘O’ rings placed on Teflon seats mounted in the grooves of the piston maintain the pressure integrity of the equilibrium cell. A small magnetic stirrer placed on the piston is used to enhance the sample homogeneity. Moreover, the housing of the entire apparatus in a rocking cage permits additional equilibration of the sample.
A high-precision Pt-100 thermocouple and a SEDEME pressure transducer measure the cell temperature and pressure respectively. The accurate detection of phase boundaries is achieved via the extrinsic fiber optic sensors mounted in the cell cover.
A beam of light (red light 660 nm wavelength), launched through a bunch of optical fibers is incident upon a 45° sapphire roof prism surrounded by the fluid in the cell. The returned signal of the red light, which is a function of the fiber geometry.
Publications
Abhijit Dandekar and Erling Stenby, "Measurement of Phase Behavior of Hydrocarbon Mixtures Using Fiber Optical Detection Techniques" (SPE 38845)
Abhijit Y. Dandekar, Simon I. Andersen and Erling H. Stenby, "Solid Organic Deposition During Gas Injection Studies – Part I" (Paper for AIChE National Spring Meeting, March 14-18, 1999, Houston, Texas)(Proceedings)
Abhijit Y. Dandekar, Simon I. Andersen and Erling H. Stenby, "Solid Organic Deposition During Gas Injection Studies – Part II" (Presented at the 20th Annual Workshop and Symposium on Collaborative Project and Enhanced Oil Recovery. International Energy Agency, September 21-24, 1999, Paris, France)
Abhijit Y. Dandekar and Erling H. Stenby, "Measruement of Phase Boundaries of Hydrocarbon Mixtures Using Fiber Optical Detection Techniques" (Industrial & Engineering Chemistry Research, 39(7) (2000) 2586-2591)
Abhijit Y. Dandekar, Simon I. Andersen and Erling H. Stenby, "Solid Organic Deposition During Gas Injection Studies" (Petroleum Science and Technology, 18(9-10) (2000) 1209-1229)