Saturated hydrocarbons of Ulyanovsk oblast crude oils and waxes isolated from these oils

Golovko, Yu. A.; Певнева, Г. С.; Головко, А. К.

doi:10.1134/s0965544110030023

Cited by 2 publications

(2 citation statements)

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“…The values of naphthalene maturation parameters MNR, DNR 1, DNx, α/βDN 1, TNR 3, α/βTN 1, α/βTN 2, and TNy ,− in pyrolysates at 250 °C indicate a significant influence of Pt(IV)-ion on the isomerization reactions of methyl groups from α- to thermodynamically more stable β- positions on the naphthalene ring. In the case of Ru(III)-ion, a completely opposite effect was reported since the values of all naphthalene ratios in pyrolysate obtained in the presence of Ru(III)-ion show a lower maturity level compared with the pyrolysate of pure shale at 250 °C (Table ).…”

Section: Resultsmentioning

confidence: 98%

“…Values of the mentioned naphthalene maturation parameters ,− in pyrolysates obtained at 400 °C suggest that the metal ions have a catalytic effect on isomerizations of methyl groups that lead to the generation of more thermodynamically stable naphthalene isomers. Again, the Ru(III)-ion exhibits a somewhat more pronounced effect compared to that of the Pt(IV)-ion on the naphthalene maturation ratios, with the exception of parameters DNx and α/βDN 1.…”

Section: Resultsmentioning

confidence: 99%

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Pyrolysis and Catalyzed Pyrolysis in the Investigation of a Neogene Shale Potential from Valjevo-Mionica Basin, Serbia

et al. 2010

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The generative potential of a Neogene shale from Valjevo-Mionica Basin (Serbia) was investigated using conventional pyrolysis and pyrolysis in the presence of Pt(IV)- and Ru(III)-ions at temperatures 250 and 400 °C. Total liquid pyrolysate and hydrocarbon yields obtained in pyrolytic experiments, group composition of liquid pyrolysates, and distributions of saturated biomarkers and alkylaromatics in pyrolysates showed that the shale is in a catagenetic stage and may be a source of liquid hydrocarbons. It was estimated that similar shales found at a depth of 2300−2900 m would become active oil generating source rock where the minimum temperature necessary for catagenetic hydrocarbon generation is between 103 and 107 °C. The used metal ions, demonstrated significant positive effects on the yields of total liquid pyrolysate and corresponding hydrocarbons, at both temperatures 250 and 400 °C. Comparison of the results of alkylaromatics maturity parameters with maturity ratios calculated from distribution and abundance of saturated biomarkers showed that the metal ions had much greater influence on maturity changes on planar aromatic systems than on isomerizations in the molecules of polycyclic alkanes. The influence of Pt(IV)- and Ru(III)-ions on the distribution of saturated biomarkers in liquid pyrolysates is the same at both temperatures. The used metal ions have greater impact on kerogen degradation, which directly reflects on the increase in the quantity of hydrocarbons, than on isomerization reactions: moretanes → hopanes, hopanes → neohopanes and 5α(H)14α(H)17α(H)20(R)-steranes → 5α(H)14α(H)17α(H)20(S)-steranes. Interactions between the used metal ions and aromatic systems during pyrolysis depend on temperature. Pt(IV)- and Ru(III)-ions demonstrated significant catalytic effect on maturation changes in both naphthalene and phenanthrene isomers during pyrolysis at 400 °C. Catalytic effects of Pt(IV)-ion on maturation changes in alkylnaphthalenes and Ru(III)-ion on maturation changes in alkylphenanthrenes were observed at 250 °C, which is caused by the different coordination properties of these metal ions.

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