SONOCHEMICAL TRANSFORMATIONS OF METHANE AND ETHYLENE
1815
process parameters (e.g., temperature, temperature
gradient, and pressure in a gas-vapor bubble) under
conditions of cavitation. Clarification of the true
mechanism of the process requires a number of special
experiments. It is necessary in particular to clarify the
8. S. J. Shaw and P. D. M. Spelt, J. Fluid Mech. 646, 363
(
2010).
9. R. I. Nigmatulin, A. A. Aganin, D. Yu. Toporkov, and
M. A. Il’gamov, Dokl. Phys. 59, 431 (2014).
role of such active particles as ions, radicals, radical 10. A. A. Aganin and D. Yu. Toporkov, Uchen. Zap. Ka-
ions, and excited particles.
zan. Univ., Ser. Fiz.-Mat. Nauki 159, 271 (2017).
1
1. A. Gaydon and I. Hurle, The Shock Tube in High-Tem-
perature Chemical Physics (Springer, New York, 1963).
CONCLUSIONS
1
2. G. L. Agafonov and A. M. Tereza, Russ. J. Phys. Chem.
Based on our experimental data, we may conclude
that the main product of the sonochemical oxidation
of methane, ethylene, and mixtures of them in aque-
ous solutions at ultrasound frequency ν = 22 kHz is
formaldehyde, which forms even if there is no dis-
solved oxygen in the initial solution. The rate of form-
aldehyde accumulation depends on the power of the
ultrasound and the amount of molecular oxygen
introduced into the system.
B 9, 92 (2015).
1
3. D. F. Davidson, M. A. Oehlschlaeger, J. T. Herbon,
and R. K. Hanson, Proc. Combust. Inst. 29, 1295
(2002).
1
4. M. J. A. Rickard, J. M. Hall, and E. L. Petersen, Proc.
Combust. Inst. 30, 1915 (2005).
1
5. O. G. Penyazkov, K. A. Ragotner, A. J. Dean, and
B. Varatharajan, Proc. Combust. Inst. 30, 1941 (2005).
1
6. M. A. Margulis, Russ. J. Phys. Chem. A 82, 1407
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7. M. A. Margulis, Russ. J. Phys. Chem. A 82, 1407
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8. I. E. El’piner and A. V. Sokol’skaya, Zh. Fiz. Khim. 45,
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9. M. A. Margulis, Zh. Fiz. Khim. 50, 2531 (1976).
(
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