Investigation of the Reaction of ³CH₂ with NO at high Temperatures

Abstract

The reaction k H , + N O was studied behind incident shock waves over the temperature range 1100-2600K by following the H and 0 atom formation with Atomic Resonance Absorption Spectroscopy (ARAS) and the OH radical formation with Laser Absorption. In the temperature range from 1100 to 2500 K the rate constant of the H atom formation formally attributed to a reaction channel giving HCNO+H (1 h) obtained on the basis of the experiments reported here is k , ,, = lo('* 4 * 0 ').exp (-(25 * 2) kJ rnol-'/RT) crn3 mol-s-'. The rate constant of' the channel leading to HCN+OH (1 d) was determined to be k , , = 10("7"o.3)~exp(-(12+2) k J m o l~' / R T ) c m 3 m o l s -' .

Photolysis of Ketene at 193 nm and the Rate Constant for H + HCCO at 297 K

“…This mechanism is shown in Table 1. [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] Following Peeters and co-workers, 10,11 we assumed that H + HCCO, reaction 2, occurs on both singlet and triplet surfaces, producing 92% CH 2 (a 1 A 1 ) and 8% CH 2 (X 3 …”

Measurement of the rate coefficient of the reaction CH+O2 ? products in the temperature range 2200 to 2600 K

“…Basically the same experiment was repeated in more recent studies by Markus et al [31] and Bauerle et al [32]. In [31], the formation of CH and C was also measured.…”

HIGH-TEMPERATURE PHOTOCHEMISTRY IN THE ATMOSPHERE OF HD 189733b

“…The primary fate of CH 4 in the upper atmosphere is reaction with H to produce CH 3 , which immediately reacts with H 2 to restore CH 4 , × e −400/T cm 3 s −1 (Bauerle et al 1995) Net: 2CH 4 → C 2 H 2 + 2H 2 + 2H. The net result is the production of C 2 H 2 in the upper atmosphere at the ∼1 ppm level.…”