High-resolution mass spectrometric analysis of a vanadyl porphyrin fraction isolated from the >700 deg.C resid of Cerro Negro heavy petroleum

摘要

A vanadium-enriched fraction from the >700 deg.C resid of Cerro Negro heavy petroleum was analyzed by high-resolution, low-energy, electron-ionization mass spectrometry (low-eV HR/MS). This fraction, isolated in a prior investigation by liquid chromatographic methods, was known to Contain 19 500 ppm vanadium, or 4.6 wt /100 of the total vanadium in the whole resid. On the Basis of UV-visible absorption spectra, the concentration of porphyrinic vanadium in the fration Was previously estimated to be 11 000 ppm or 56.4 wt/100 of the total vanadium.