UV absorption cross section of the molecules O2, NO, N2O, CO2, H2O, and NO2

A study of N2O decomposition rate constant at high temperature: Application to the reduction of nitrous oxide by hydrogen

“…Temperature and pressure behind the reflected shock wave were computed from the incident shock speed, which was measured by piezoelectric pressure gauges. [3] with k N 2 O+Ar suggested by Dean and Bozzelli [13] with k N 2 O+Ar determined by Röhrig et al [7] [3] with k N 2 O+Ar suggested by Dean and Bozzelli [13] with k N 2 O+Ar determined by Röhrig et al [7] [3] with k N 2 O+Ar suggested by Dean and Bozzelli [13] with k N 2 O+Ar determined by Röhrig et al [7] Meagher and Anderson [9] Baulch et al [14] Davidson et al [5] Dean and Bozzelli [13] Röhrig et al [7], Hanson and Salimian [11], Tsang and Herron [12] Zuev and Starikovskii [4] The optical detection technique for measuring O atom concentration was an emission line absorption method. A microwave-excited discharge lamp that contained a flowing mixture of 1% O 2 in He maintained at a pressure of 1.4 kPa was used as light source.…”

“…They found a minimum energy point of about 243 kJ mol −1 with the (X 1 + , 3 ) crossing surface. If the present result is compared only with the more recent experimental [3,[6][7][8] or theoretical [10] determinations or with the rate constant recommended in the literature [13,14,27], except the expressions reported by Zuev and Starikovskii [3] and Miller and Bowman [27], which give values higher than those found in this study at low temperatures, the rate constant reported here has been found to be overall slightly higher than those reported by other teams, in the temperature range 1490-2490 K. In particular, concerning the preexponential factor, we found a value two times higher than some others given recently in literature [6,7,10,13]. To show that the choice of the rate constants of the reduced mechanism used to simulate our experimental measurements did not influence significantly our results, what could explain the deviation with those reported previously in the literature, the influence of the rate constants for the consumption of O atoms by their reactions with N 2 O has been investigated.…”

“…The reduced reaction mechanism used for the computed simulations (SENKIN II [22]) is given in Table II. The high-pressure limiting rate constant determined by Zuev and Starikovskii [3] was chosen. For the reactions involving O with N 2 O, the rate constant results from the intensive study of Meagher and Anderson [9] (also recommended by Baulch et al [14]) were used.…”

“…The thermal decomposition and reactions of N 2 O have been the subject of numerous old [1,2] and recent experimental [3][4][5][6][7][8][9] and theoretical [10] studies, as seen in the reviews by Hanson and Salimian [11], Tsang and Herron [12], and more recently, Dean and Bozzelli [13] and Baulch et al [14]. These early studies established that the thermal N 2 O decomposition reaction proceeds via a spin-forbidden, nonadiabatic pathway to form O( 3 P) atoms in preference to the spin-allowed pathway to form O( 1 D) atoms: Consequently, the experimental activation energy of the decomposition reaction was found very much higher than the N 2 -O( 3 P) bond energy.…”

Spectra comparison for an optical breathing gas sensor development

“…To the best of our knowledge, there is no previous works to measure water vapor absorption cross section in the region of 200 nm to 250 nm. Although research [19] has been done to determine the spectrum for water molecule in the region of 190 nm to 250 nm, it is only for high temperature which is from 1000 to 3700 K. It has been reported by H. Okabe et al [20], water vapor absorption cross section becomes appreciable only in the UV region lower than 190 nm. It is also reported in the UVACS database, that water vapor spectrum only exists in the range 120-189 nm and 260-330 nm [21].…”