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- W2351117561 abstract "The asphaltene structure and composition changes pre-and post hydrotreating of residue with different asphaltene contents were researched by 1H-NMR,elemental analysis and molecular weight determination,et al.The results show that the molecular weight,H/C,σ,w(HAU)/w(C),w(Hα),w(Hβ),w(Hγ)and substituted aromatic-carbon ratio of asphaltene decreased after hydrotreating;but aromatic-carbon ratio,w(HA),protonic aromatic-carbon ratio increased.All above factors show that the condensation degree of asphaltene after hydrotreating is increased and asphaltene is dealkylation in residue hydrotreating.Sulfur in asphaltene decreased but nitrogen increased.The aromatic ring and naphthene ring of hydrotreated asphaltene increase with the increase of asphaltene content in feedstock.The aromatic ring numbers of hydrotreated asphaltene even more than that of original asphaltene.Asphaltene react in the forms of structure units in residue hydrotreating.The reaction mechanism of asphaltene in hydrotreating is free radical reaction and carbonium ion reaction." @default.
- W2351117561 created "2016-06-24" @default.
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- W2351117561 date "2010-01-01" @default.
- W2351117561 modified "2023-09-23" @default.
- W2351117561 title "Structure Changes of Asphaltene in Residue Hydrotreating" @default.
- W2351117561 hasPublicationYear "2010" @default.
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