A comparative study of bitumen molecular-weight distributions

被引：56
作者：
Domin, M
Herod, A
Kandiyoti, R
Larsen, JW
Lazaro, MJ
Li, S
Rahimi, P
机构：
[1] Lehigh Univ, Dept Chem, Bethlehem, PA 18015 USA
[2] Univ London, Sch Pharm, Dept Pharmaceut & Biol Chem, London WC1N 1AX, England
[3] Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, London SW7 2BY, England
[4] Natl Ctr Upgrading Technol, Devon, AB T6G 1A8, Canada
来源：
ENERGY & FUELS | 1999年 / 13卷 / 03期
关键词：
D O I：
10.1021/ef980065b
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A sample of Athabasca bitumen was fractionated by preparative size-exclusion chromatography (SEC), and the molecular-weight distribution of the five fractions and the original sample were determined by SEC in NMP solvent using a calibration based on polystyrene standards, by Cf-252 plasma desorption mass spectrometry (PDMS), and by laser desorption and matrix-assisted laser-desorption mass spectrometry (LDMS and MALDI) and the average molecular weights were measured by vapor pressure osmometry (VPO). A comparison of the results shows that VPO, MALDI, and SEC gave similar results while PDMS showed the same trend. The molecular-weight distribution of this 525+ degrees C fraction is continuous up to and perhaps beyond a molecular weight of 15000.
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收藏
页码：552 / 557
页数：6
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