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Laboratory scale upgrading (demetallization, desulfurization, denitrogenation and increase in the H/C ratio) of Orinoco Belt crude oil and its fractions is described by an electrochemical system in the presence of protonating agents. Hamaca petroporphyrin can be efficiently demetallized (73%) and desulfurized (35%) by electrolysis at about 0.01 A cm -2 in the presence of methanol as...
Use of the simple perturbation molecular orbital (PMO) method allows the first-order estimation of energies of formation (E f ) of polycyclic aromatic hydrocarbons (PAH) as well as their localization (E L ) and bislocalization (E b ) energies. These calculations give theoretical support to experimental evidence in the literature which suggests that massive systems (more than...
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