Configurational diffusion of asphaltenes in fresh and aged catalyst extrudates. Quarterly progress report, December 20, 1994--March 20, 1995 | Zendy

J.A. Guin | Zendy

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Configurational diffusion of asphaltenes in fresh and aged catalyst extrudates. Quarterly progress report, December 20, 1994--March 20, 1995

Author(s) -

J.A. Guin

Publication year - 1995

Language(s) - English

Resource type - Reports

DOI - 10.2172/80752

Subject(s) - asphaltene , polystyrene , angstrom , calibration curve , calibration , resolution (logic) , diffusion , analytical chemistry (journal) , materials science , mineralogy , chemistry , chromatography , polymer , thermodynamics , organic chemistry , crystallography , composite material , mathematics , physics , statistics , artificial intelligence , computer science , detection limit

This quarter, GPC column efficiency and resolution were tested. Better resolution and separation of petroleum asphaltenes were obtained in GPC by connecting four columns (1000{Angstrom}, 1000{Angstrom}, 500{Angstrom}, 500{Angstrom} pore sizes, respectively) in series. A good linear column calibration curve was obtained using several polystyrene standards with molecular weights ranging from 500 to 5 {times} 10{sup 4}. The molecular weight distribution of a petroleum asphaltenes was approximated by the polystyrene calibration curve

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