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.

引用

页码：552 / 557

页数：6

共 27 条

[1] CALIBRATION OF GEL-PERMEATION COLUMNS IN THE HIGH-MOLECULAR-MASS RANGE - FIXED HUMAN THROMBOCYTES FOR THE ESTIMATION OF INTERSTITIAL VOLUME AND THE HEMOCYANIN OF THE VINEYARD SNAIL HELIX-POMATIA AS A MOLECULAR-MASS CALIBRATION SUBSTANCE [J].