Hydrogenation during Adiabatic Cavitation in a Hydrocarbon Medium

The presence of diamond nanocrystals in the particles indicates that the collapse provided favorable thermodynamic conditions for the stability of diamond matter within bubbles. Hence, the pressures developed in the bubbles were ~10 n kbar [4]. Increase of pressure up to these values corresponds to contraction of the bubble by 10 5 ‐10 6 times during its collapse. Hence, the initial size of the bubbles was ~1 mm. Bubbles of this size were generated by a profiled jet pipe, whose minimum and maximum sizes in the experimental device were 3 and 10 mm, respectively. At a bubble size of 1 mm, the propagation time of the shock wave was 10 ‐6 s, which is three orders of magnitude lower than the time of asymmetric collapse, during which the maximum pressure reached n kbar at a temperature less than 1000 ° C [5]. The thermodynamic conditions in the bubbles during their adiabatic compression were such that the kinetic energy of any particle in a volume of the cavitating bubble was significantly higher than the atombonding energy in the molecule of the working organic liquid (benzol). Hydrogen atoms released during the formation of diamonds and the high-carbon phase should trigger the hydrogenation of the working liquid. High temperatures at sites of bubble collapse should also provoke variations in the initial composition of the working liquid. This work presents the results of study of products of organic synthesis that accompany the adiabatic cavitation synthesis of diamonds. The experiment with the cavitation synthesis of dia