Excess electron mobility in hydrocarbon liquids at high pressure

Journal Article · Thu Aug 13 04:00:00 EDT 1987 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100301a042· OSTI ID:5737090

Munoz, R C; Holroyd, R A; Itoh, K; Nakagawa, K; Nishikawa, M; Fueki, K

Excess electron mobilities (..mu..) are reported as a function of pressure (1-2500 bar) and temperature (20-120 /sup 0/C) for n-pentane, 3-methylpentane, and cyclopentane for which ..mu.. at 20 /sup 0/C and low pressure is less than or equal to 1.0 cm/sup 2//(V x s), and for 2,2-dimethylbutane (2,2-DMB) for which ..mu.. approx. 10 cm/sup 2//(V x s) at 1 atm and room temperature. For the first three liquids the mobility decreases with pressure at all temperatures studied. The results are interpreted in terms of an equilibrium between quasi-free and trapped electrons, and application of pressure shifts the equilibrium in favor of trapped electrons thus lowering the mobility. The volume changes, associated with trapping, which are of the order of -20 cm/sup 3//mol at standard conditions are attributed to electrostriction of the solvent by the trapped (or localized) electron. For 2,2-DMB, the mobility increases with increasing pressure at low temperature and decreases with pressure at high temperature. This behavior is not understood but suggests that traps are unimportant in 2,2-dimethylbutane.

• Research Organization: Brookhaven National Lab., Upton, NY
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5737090
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:17; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
ALKANES
CYCLOALKANES
DENSITY
ELECTRON MOBILITY
ENERGY
HIGH PRESSURE
HYDROCARBONS
MEDIUM PRESSURE
MEDIUM TEMPERATURE
MOBILITY
ORGANIC COMPOUNDS
PARTICLE MOBILITY
PENTANE
PHYSICAL PROPERTIES
TEMPERATURE DEPENDENCE
VERY HIGH PRESSURE