Open AccessConfigurational 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