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- W2006988492 abstract "Crude oil from the Moslavina basin was found to have very low abundances of the trace metals vanadium, nickel, iron, sodium, potassium and calcium, ranging from a minimum of 0.02 to a maximum of 16 μg g−1. Of the metals originally present in the crude oil, nickel had the highest mean mass yield of 6.0 μg g−1, vanadium the lowest (0.5 μg g−1). The metal abundances determined in oil distillation products (light gas oil, heavy gas oil and atmospheric residue) were low. Vanadium and nickel were primarily identified in the resin fraction of Moslavina oil, proving them to be mainly associated with the less polar constituents of intermediate molecular mass. Iron was mainly present in the asphaltic oil fraction (mass yield of 50%), most probably in the form of porphyrin and non-porphyrin complexes. Sodium, potassium and calcium were not organically bound in the crude oil matrix, but were associated with suspended mineral matter or emulsified aqueous phase. Investigation of trace metal distribution in products of atmospheric distillation of Moslavina oil showed that up to a temperature limit of 350 °C metals evaporated only slightly; they could not be detected in the petrol fraction. In the course of the processing procedures ≈ 90% of all the trace metals present in crude oil was concentrated in the atmospheric residue." @default.
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- W2006988492 date "1987-10-01" @default.
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- W2006988492 title "Trace-metal distribution in Moslavina basin crude oil and oil products" @default.
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- W2006988492 doi "https://doi.org/10.1016/0016-2361(87)90192-x" @default.
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