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Research on the Mechanism of Low-Temperature Oxidation of Asphaltene.
Zhao, Zhengchong; Yang, Haiyang; He, Jingjing; Hu, Fuqiang; Cheng, Fan; Liu, Hai; Gong, Chunli; Wen, Sheng.
Affiliation
  • Zhao Z; School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China.
  • Yang H; HuBei FTSCI BioTech Co., Ltd., Xiaogan 432000, China.
  • He J; School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China.
  • Hu F; HuBei FTSCI BioTech Co., Ltd., Xiaogan 432000, China.
  • Cheng F; Hubei Engineering & Technology Research Center for Functional Materials from Biomass, Hubei Engineering University, Xiaogan 432000, China.
  • Liu H; Hubei Collaborative Innovation Center for Biomass Conversion and Utilization, Hubei Engineering University, Xiaogan 432000, China.
  • Gong C; School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China.
  • Wen S; School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China.
Molecules ; 28(14)2023 Jul 12.
Article de En | MEDLINE | ID: mdl-37513237
ABSTRACT
Asphaltene extracted from heavy oil was oxidized by a mixture of propionic anhydride and hydrogen peroxide at a low temperature of 50 °C. Elemental analysis, infrared analysis, proton nuclear magnetic resonance analysis, and gas chromatograph/mass spectrometer analysis results indicated that oxygen addition, side chain cleavage, and condensation reactions mainly occurred in the oxidation process. The oxidation products were divided into 28% methanol solubles and 72% methanol insolubles. There were mainly fatty acids and fatty acid esters in the methanol solubles. There were also small amounts of aromatic compounds with low condensation in the methanol solubles, and the alkyl side chains were mostly short ones. The degree of aromatic ring condensation in the methanol insolubles was slightly higher than that of the pristine asphaltene. There were still some long unbroken chains in the methanol insolubles after the low-temperature reaction. The molecular dynamics simulation results show that the distribution of propionic anhydride around the asphaltene molecules can promote the oxidation of asphaltene. This low-temperature oxidation technology can be used to process asphaltenes to improve the profitability of heavy-oil-processing enterprises.
Mots clés

Texte intégral: 1 Collection: 01-internacional Base de données: MEDLINE Langue: En Journal: Molecules Sujet du journal: BIOLOGIA Année: 2023 Type de document: Article Pays d'affiliation: Chine

Texte intégral: 1 Collection: 01-internacional Base de données: MEDLINE Langue: En Journal: Molecules Sujet du journal: BIOLOGIA Année: 2023 Type de document: Article Pays d'affiliation: Chine
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