Hindered Stepwise Aggregation Model for Molecular Weight Determination of Heavy Petroleum Fractions by Vapor Pressure Osmometry (VPO)

2013 ◽  
Vol 27 (3) ◽  
pp. 1331-1336 ◽  
Author(s):  
Linzhou Zhang ◽  
Quan Shi ◽  
Changsen Zhao ◽  
Na Zhang ◽  
Keng H. Chung ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Vapor Pressure ◽  
Vapor Pressure Osmometry ◽  
Molecular Weight Determination ◽  
Heavy Petroleum ◽  
Aggregation Model ◽  
Petroleum Fractions

Molecular Weight and Aggregation of Heavy Petroleum Fractions Measured by Vapor Pressure Osmometry and a Hindered Stepwise Aggregation Model

2014 ◽  
Vol 28 (10) ◽  
pp. 6179-6187 ◽  
Author(s):  
Linzhou Zhang ◽  
Suoqi Zhao ◽  
Zhiming Xu ◽  
Keng H. Chung ◽  
Changsen Zhao ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Vapor Pressure ◽  
Vapor Pressure Osmometry ◽  
Heavy Petroleum ◽  
Aggregation Model ◽  
Petroleum Fractions

scholarly journals Determination of Molecular Weight

1966 ◽  
Vol 49 (4) ◽  
pp. 744-749
Author(s):  
C L Ogg
Keyword(s):  
Molecular Weight ◽  
Vapor Pressure ◽  
Initial Study ◽  
Vapor Pressure Osmometry ◽  
Reference Standard ◽  
Isothermal Distillation

Abstract An initial study, in which 23 collaborators participated, was conducted on the determination of molecular weight by the isothermal distillation (vapor pressure osmometry) method. Each used his own method and apparatus to analyze four samples in duplicate; the molecular weight ranged from 123 to 891. Results show that the chief problem is the choice of the correct solvent and reference standard and that the use of bare thermistors is questionable.

Sign in / Sign up

Export Citation Format

Share Document