A method of determining asphaltene stability within a crude oil sample that includes obtaining a crude oil sample and performing a fractional analysis of the crude oil sample. The method further includes measuring, via a cylindrical capacitor, a dielectric constant of the crude oil sample and its ...
The permittivity measurement is conducted by placing a 0.01 ml oil sample between the two output ports of the WPD, where its dielectric constant directly alters the impedance and isolation characteristics. The sensor is calibrated using materials with known permittivity to create a reference curve, ...
(ii) No remarkable differences in the dielectric constant among different grades of bitumen from the same crude oil source can be seen. (iii) Regular changes of dielectric loss tangent (tan 未) among the different grades of bitumen can be observed, which can be a good indicator for the ...
where ε′ is a constant of proportionality defined as the relative permittivity (dielectric constant) of the material between the electrodes, ε0 is a constant known as the permittivity of free space (1/3671×10−9 Farads m−1), A is the area of the electrodes (m2), and d is the...
If after cooling, the charges are immobilised, the dielectric will behave as an electrical equivalent of a permanent magnet. This is known as an electret (thermoelectrets in this case). An electret loses its volume charge exponentially but with a very large time constant (order of 100 years...
The dielectric constant was determined from a measurement of the propagation time of an impulse at microwave frequency through a transmission line containing the test sample.;Findings and Conclusions. There is no single mixing law applicable to the whole range of dielectric constant of saturating ...
Design of the oil-water interface detection device based on the frequency method In the process of settling dehydration of crude oil,the automation and high precision detection of oil-water interface is very important. This design according to the different of oil-water dielectric constant,using the...
monoenesanddienesandinsmallamountsduetotrienesandsecondaryproductslikeketoaldehydes·DielectricconstantforoliveoilIS stableandaImostunchangeablewithMWradiationwhilesunfloweroil’s占’oscillatesaroundtheoriginvalueIngreaterrate·UeIectr。c 1Oss ,,decreaseswithincreasingtimeofMWradiationanditsmaximumshiftstowardshigherfre...
5. Adopting the automatic infrared liquid level control system, automatic constant temperature control system, automatic bubble elimination control system, automatic pressure protection system, automatic interlock protection system and efficient degassing and water removal system to ensure...
2, 1998. The results show that gassing tendency of the test fluid is significantly lower than that obtained with the commercial naphthenic oil and that the gassing levels remained relatively constant over time. TABLE 5 Gassing Tendency of Hydrocracked/Hydroisomerized/ Hydrogenated Transformer Oil ...