Kinetics of the reaction OH + C sub 2 H sub 4 in He, N sub 2 , and O sub 2 at low pressure

Journal Article · Thu Feb 07 04:00:00 EST 1991 · Journal of Physical Chemistry; (United States)

OSTI ID:5233614

Kuo, Ching-Hui; Lee, Yuan-Pern ^[1]

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1. National Tsing Hua Univ., Hsinchu (Taiwan)

The rate coefficients of the reaction of OH and C{sub 2}H{sub 4} with the diluents M = He (P{sub He} = 1-5 Torr), N{sub 2} (P{sub N{sub 2}} = 0.8-3.2 Torr) and O{sub 2} (P{sub 0{sub 2}} = 0.3-1.5 Torr) have been determined by means of the discharge flow/resonance fluorescence technique. The rate coefficients agree well with the set of smaller reported values. The termolecular rate coefficients at the low-pressure limit (all in unit of 10{sup {minus}29} cm{sup 6} molecule{sup {minus}2}s{sup {minus}1}) at 300 K are k{sup III}{sub He} = 2.7 {plus minus} 0.5, k{sub O}{sup III} = 5.3 {plus minus} 1.1, and k{sub N}{sup III}, = 6.1 {plus minus} 1.2; the uncertainties represent 95% confidence limits. The rate coefficients for M = He was studied over the temperature range 251-430 K. A negative activation energy (-E{sub a}/R) in the range 1,290-1,560 K, much greater than the previously recommended value, has been observed.

• OSTI ID: 5233614
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 95:3; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACTIVATION ENERGY
ALKENES
ATMOSPHERIC CHEMISTRY
CHEMICAL REACTION KINETICS
CHEMISTRY
COMBUSTION PRODUCTS
DATA
EMISSION SPECTROSCOPY
ENERGY
ETHYLENE
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
HYDROCARBONS
HYDROXYL RADICALS
INFORMATION
KINETICS
LOW PRESSURE
MEDIUM TEMPERATURE
NUMERICAL DATA
ORGANIC COMPOUNDS
RADICALS
REACTION KINETICS
SPECTROSCOPY