| Previously, nuclear magnetic resonance (NMR) carbon-type analysis data were used to model visbreaking of Athabasca bitumen [1], where the major reaction pathways during visbreaking were identified. The present work extends the same approach further to explain the visbreaking behavior of six different oils.;In the current study, the visbreaking of these oils was performed at a single severity and the feed and the products were separated into different pseudo-components. The quantification of carbon-types in these pseudo-components was done using elemental analyses and nuclear magnetic resonance spectroscopy. Four classes of representative model compounds were chosen based on the carbon-type data of the pseudo-components. A literature review of the pyrolysis studies of these model compounds suggested the major types of reactions involved during visbreaking. Through the use of reaction pathways and model rules, model correlations were able to predict the residue conversion, coke formation and product yields during visbreaking. |
