Direct investigations of the kinetics of the reactions of CN radicals with N atoms and 3CH2 radicals with NO

Burak Atakan*, Daniel Kocis, Jürgen Wolfrum, Peter Nelson

*Corresponding author for this work

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

The kinetics of two elementary reactions of radicals important in fuel nitrogen chemistry were investigated by means of the laser photolysis -laser induced fluorescence and molecular beam mass spectrometry methods. Reaction (-1) CN+N=C+N2 was investigated at 900 Pa total pressure. The rate constants decreased by one order of magnitude between room temperature and 534 K and could be fitted with the following Arrhenius expression: k-1(294 K≤T≤534 K)=10(11.29±0.06)exp((1770±170)/T) cm3mol-1 At 750 K an upper limit of 5·1011 cm3mol-1 was determined for reaction (-1). In the reaction of 3CH2 radicals with NO the addition complex CH2NO as well as the final products OH and HCN were detected and the branching ratios (α) for the following channels have been determined: CH2+NO→(CH2NO)* (CH2NO)*(+M)→NCO+H2 α300-1025 K<0.15 →HCN+OH α300 K=0.015±0.08; α1025 K=0.63±0.25 →CN+H2O α300-1025 K<0.1 By monitoring the OH formation, rate constants between 294 and 1025 K were derived: k2a(294K≤T≤1025 K)=10(12.54±0.05)exp((190±10)/T)cm3mol-1s-1.

Original languageEnglish
Pages (from-to)691-699
Number of pages9
JournalSymposium (International) on Combustion
Volume24
Issue number1
DOIs
Publication statusPublished - 1992
Externally publishedYes

Fingerprint Dive into the research topics of 'Direct investigations of the kinetics of the reactions of CN radicals with N atoms and 3CH2 radicals with NO'. Together they form a unique fingerprint.

Cite this