A. Laskin et H. Wang, On initiation reactions of acetylene oxidation in shock tubes - A quantum mechanical and kinetic modeling study, CHEM P LETT, 303(1-2), 1999, pp. 43-49
Reaction between acetylene and molecular oxygen was analyzed using quantum
mechanical calculations and kinetic modeling of acetylene oxidation in shoc
k tubes. Calculations at the G2(B3LYP) level of theory show that the direct
attack of molecular oxygen on the pi bond in acetylene has a larger energy
barrier than acetylene <----> vinylidene isomerization, such that this iso
merization followed by the reaction of vinylidene with molecular oxygen is
the energetically favorable initiation reaction of acetylene oxidation. It
is further shown that detailed kinetic models of acetylene oxidation includ
ing this initiation process predict well the experimental shock tube igniti
on delay data. (C) 1999 Elsevier Science B.V. All rights reserved.