화학공학소재연구정보센터
Journal of Physical Chemistry, Vol.99, No.38, 13984-13991, 1995
Shock-Tube and Modeling Study of the H+o-2=oh+o Reaction over a Wide-Range of Composition, Pressure, and Temperature
The rate coefficient of the reaction H + O-2 = OH + O (1) was determined using OH laser absorption spectroscopy behind reflected shock waves over the temperature range 1050-2500 K and the pressure range 0.7-4.0 atm. Eight mixtures and three stoichiometries were used. Two distinct and independent criteria were employed in the evaluation of k(1). Our recommended expression for k(1) is k(1) = 7.13 x 10(13) exp(-6957 K/T) cm(3) mol(-1) s(-1) with a statistical uncertainty of 6%. A critical review of recent evaluations of k(1) yields a consensus expression given by k(1) = 7.82 x 10(13) exp(-7105 K/T) cm(3) mol(-1) s(-1) over the temperature range 960-5300 K. We do not support a non-Arrhenius rate coefficient expression, nor do we find evidence of composition dependence upon the determination of k(1).