Our studies of crude oil fouling have revealed two manifestations of the isokinetic phenomenon. First, initial fouling rates of four proprietary crude oils clearly exhibit an isokinetic temp. in the middle of their Arrhenius plot. A plot of natural logarithms of pre-exponential factors vs. apparent activation energies is linear, confirming the validity of the isokinetic temp. and indicating the presence of the compensation effect. Second, the initial fouling rates of Maya crude oil and styrene fouling systems become velocity-independent, thereby creating another isokinetic condition, at temps. of 274 DegC and 77 DegC, resp. The compensation effect is also obsd. in the Maya crude oil and styrene systems but here the linearity in the logarithms of pre-exponential factors with apparent activation energies is due to changes in velocity instead of changes in fluid type. This paper will discuss the background of the compensation effect and its manifestation in the isokinetic phenomenon.
|Publication status||Published - 2008|
|Event||235th ACS National Meeting - New Orleans, LA, USA United States|
Duration: 6 Apr 2008 → 10 Apr 2008
|Conference||235th ACS National Meeting|
|Country||USA United States|
|City||New Orleans, LA|
|Period||6/04/08 → 10/04/08|