Pressure dependence of the reaction of chlorine atoms with ethene and acetylene in air at 295 K

Journal Article · Thu May 03 04:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100372a052· OSTI ID:6371704

Wallington, T J; Andino, J M; Lorkovic, I M; Kaiser, E W ^[1]; Marston, G ^[2]

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1. Ford Motor Co., Dearborn, MI (USA)
2. NASA/Goddard Space Flight Center, Greenbelt, MD (USA)

The relative rate technique has been used to determine rate constants for the reaction of chlorine atoms with ethene and acetylene over the pressure ranges 10-3,000 and 10-5,800 Torr, respectively, of synthetic air at 295 K. The decays of the reactants were measured relative to that of either ethane or chloroethane or both. Using a pressure-independent value of 5.7 {times} 10{sup {minus}11} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1} for the reaction of Cl with ethane, the relative data were placed on an absolute basis and fit to the Troe expression with the broadening factor, F, fixed at 0.6. Values of the best-fit low-pressure termolecular rate constant, k{sub 0}, and high-pressure limiting bimolecular rate constant, k{sub {infinity}}, for the reaction of Cl atoms with ethene were k{sub 01} = 1.6 {sub {minus}0.3}{sup +1} {times} 10{sup {minus}29} cm{sup 6} molecule{sup {minus}2} s{sup {minus}1} and k{sub {infinity}1} = 3.05{sub {minus}0.4}{sup +2} {times} 10{sup {minus}10} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}, and those for the reaction of Cl atoms with acetylene were k{sub 02} = (5.2 {plus minus} 0.7) {times} 10{sup {minus}30} cm{sup 6} molecule{sup {minus}2} s{sup {minus}1} and k{sub {infinity}2} = (2.3 {plus minus} 0.7) {times} 10{sup {minus}10} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}.

• OSTI ID: 6371704
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:9; ISSN JPCHA; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ACETYLENE
ALKENES
ALKYNES
ATMOSPHERIC CHEMISTRY
CHEMICAL REACTIONS
CHEMISTRY
CHLORINE
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
HALOGENS
HYDROCARBONS
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
MEDIUM TEMPERATURE
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PRESSURE DEPENDENCE