Abstract
In the paper, bulk property and chemical composition of Kazakhstan vacuum residuum were characterized. Sulfides and thiophenes were selectively isolated from the residuum and characterized by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Molecular weights of the sulfur compounds were varied from 150 to 800 Da and S1 , S2 , O1S1 , O2S1 , N1S1 class species were assigned in the heavy oil derived methylsulfonium. Vanadyl porphyrins characterized by positive-ion electrospray ionization and FT-ICR MS, which showed that etioporphyrins (ETIO) (CnH2n-28N4V1O1 , corresponding to DBE = 17) and deoxophylloerythroetioporphyrins (DPEP) (CnH2n-30N4V1O1, corresponding to DBE = 18). It should be noted that the vanadyl porphyrins were most abundant.
Highlights
In connection with the growing consumption of petroleum and petroleum products, the gradual depletion of exploited oil fields, heavy hydrocarbon raw materials are becoming in demand in the global economy
Sulfides and thiophenes were selectively isolated from the residuum and characterized by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS)
Vanadyl porphyrins characterized by positive-ion electrospray ionization and FT-ICR MS, which showed that etioporphyrins (ETIO) (CnH2n-28N4V1O1, corresponding to DBE = 17) and deoxophylloerythroetioporphyrins (DPEP) (CnH2n-30N4V1O1, corresponding to DBE = 18)
Summary
In connection with the growing consumption of petroleum and petroleum products, the gradual depletion of exploited oil fields, heavy hydrocarbon raw materials are becoming in demand in the global economy. The possibility of systematization of analytical data is hampered by the different quantitative and qualitative composition of hetero-organic compounds in oils, which vary depending on the region of oil production, the conditions of transportation, storage and processing of oil. In this regard, the development of effective methods for studying the composition and properties of hetero-organic compounds, as well as methods for their concentration and isolation in the native form, is an important scientific and technical challenge. In [11] the heteroatom classes and molecular structures of nitrogen compounds in vacuum residue are characterized by the electrospray ionization (ESI) FT-ICR MS combined with the Fourier transform infrared (FT-IR) spectroscopy. Experimental errors for all presented data range ±0.01–0.1
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