Possibility of revealing the true phase transition parameters of paraffins in a crude oil
Knowledge of phase transition temperature is an essential point in designing downstream technologies involving a crude oil. It is a conventional opinion that the flow conditions (flow rate, way and speed of changes in thermal conditions etc.) have an impact on. Experimental studies on rheological behavior of high-paraffin content model oils were performed with various conditions. The wide range of paraffin concentrations in model oils was implemented. Our research shows that with sufficiently accurate studies of paraffin's crystallization/melting in crude oil, the distorting effects of specific experimental conditions can be eliminated. As a result, in particular, the onset of crystallization and the onset of melting are observed at the same «true» phase transition temperature. Numerical analysis of thermodynamical characteristics of paraffin phase transition in model oil blend was applied, additionally has proved an ability of defining «true» phase transition temperatures.