A phase-separation kinetic model for coke formation

摘要: Coke formation during the thermolysis of petroleum residua is postulated to occur by a mechanism that involves liquid-liquid phase separation reacted asphaltenes form lean in abstractable hydrogen. This provides basis model quantitatively describes kinetics for Cold Lake vacuum residuum and its deasphalted oil an open-tube reactor at 400 C. The previously unreacted were found be fraction with highest rate thermal reaction but least extent reaction. not only described appearance disappearance also variation molecular weight hydrogen content time. Further evidence was observation spherical particles liquid crystalline coke preferential conversion most associated coke.