Experimental density and PC-SAFT modeling of Krytox (R) (perfluoropolyether) at pressures to 275 MPa and temperatures to 533 K

Journal Article · Thu Oct 25 04:00:00 EDT 2012 · Fluid Phase Equilibria

DOI:https://doi.org/10.1016/j.fluid.2012.07.008· OSTI ID:1114758

Bamgbade, B. A.; Wu, Y.; Burgess, W. A.

Density data from 298 to 533 K and to 275 MPa are reported for Krytox® GPL 102, a poly(perfluoropropyl ether) (PFPE) with a CF3-branched fluoropropylether repeat group. The Tait equation fit to each density isotherm have mean absolute percent deviations (MAPD) between 0.11 and 0.30% with standard deviations (SD) not exceeding 0.20%. The perturbed-chain statistical associating fluid theory (PC-SAFT) fit to the density data has an MAPD of 0.67% and an SD of 0.67%. Likewise the PC-SAFT fit to previously reported density data of Demnum®, a PFPE with an n-fluoropropylether repeat group, has an MAPD of 0.22% and a SD of 0.21% for Demnum® S-20 and an MAPD of 0.27% with a SD of 0.14% for Demnum® S-65. The trends exhibited by the PC-SAFT pure component parameters obtained from the fits of these three PFPEs are similar to those reported for linear and branched hydrocarbons with the same number of carbons.

• Research Organization: National Energy Technology Laboratory - In-house Research; National Energy Technology Laboratory (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• DOE Contract Number: FE0004000
• OSTI ID: 1114758
• Report Number(s): TPR-3833
• Journal Information: Fluid Phase Equilibria, Journal Name: Fluid Phase Equilibria Vol. 332; ISSN 0378-3812
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
Demnum®
Density
High pressure
Krytox®
Lubricant
PC-SAFT
PFPE
Perfluoropolyether