ISSN:
1432-2153
Keywords:
ARAS
;
Chemical shock tube
;
Thermal decomposition
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
,
Technology
Notes:
Abstract The thermal decomposition of CS2 highly diluted in Ar was studied behind reflected shock waves by monitoring time-dependent absorption profiles of S(3P) and S(1D) using atomic resonance absorption spectroscopy (ARAS). The rate coefficient of the reaction: (R1) $$\begin{gathered} CS_2 + M\mathop \to \limits^{k_1 } CS + S + M, \hfill \\ k_1 = 5.1 \times 10^{14} \exp \left( {\frac{{ - 38150K}}{T}} \right)cm^3 mol^{ - 1} s^{ - 1} \hfill \\ \end{gathered} $$ . was determined in experiments with initial concentrations of CS2 between 5 and 50 ppm at post-shock conditions of 2300 K≤T≤3360 K and total densities between 2.2×1018 cm−3 and 3.9×1018 cm−3. In experiments with higher initial concentrations of 100 ppm CS2 in Ar, the S(3P) concentrations were found to reach quasi-stationary values. From the steady state assumption a value for the rate coefficient of the most probable S consuming reaction: (R2) $$\begin{gathered} CS_2 + S\mathop \rightleftharpoons \limits^{k_2 } CS + S_2 , \hfill \\ k_2 \approx 1.2 \times 10^{13} cm^3 mol^{ - 1} s^{ - 1} \hfill \\ \end{gathered} $$ . was estimated at temperatures between 2100 K and 2340 K.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01418572
