Energy Fuels, 2012, 26 (1), pp
594–602
Desulfurization of Heavy Oil–Oxidative
Desulfurization (ODS) As Potential Upgrading Pathway for Oil Sands Derived
Bitumen
Rashad Javadli and
Arno de Klerk*
deklerk@ualberta.ca
Department of Chemical and Materials Engineering, University
of Alberta, Edmonton, Alberta T6G 2V4, Canada.
Abstract
Most of the sulfur in heavy
oil is found in bulky thiophenic structures, which is difficult to remove by
catalytic hydrodesulfurization. However,
it can readily be oxidized. The sulfoxides and sulfones produced from sulfur
oxidation can be solvent extracted from the heavy oil as a result of their
increased polarity.
Authors studied the oxidative
desulfurization of heavy oil using Canadian Cold Lake bitumen, with air as
oxidant. At experimental conditions, 46–47% of the sulfur in the bitumen could
be removed. This is equivalent to >20 kg sulfur per ton oil.
Full Text Source
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