On the Effect of a Small Acetone Impurity on the Thermal Self-Decomposition of Acetylene

• Published in: High temperature Vol. 60; no. 6; pp. 830 - 837
• Main Authors: Gurentsov, E. V., Drakon, A. V., Eremin, A. V., Mikheyeva, E. Yu
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-12-2022; Springer Nature B.V
• Subjects: Acetone; Acetylene; Additives; Atoms and Molecules in Strong Fields; Classical and Continuum Physics; Decomposition; Explosions; Heat and Mass Transfer and Physical Gasdynamics; Impurities; Industrial Chemistry/Chemical Engineering; Kinetics; Laser Matter Interaction; Materials Science; Physical Chemistry; Physics; Physics and Astronomy; Pyrolysis; Shock waves; Soot
• ISSN: 0018-151X; 1608-3156
• DOI: 10.1134/S0018151X22040149

In this article, we experimentally studied the effect of acetone impurities on the induction time and soot yield during the self-decomposition of acetylene behind shock waves. The results of the experiments showed that variation of the acetone impurity in the range 0.5–3.0%, characteristic of technical acetylene, does not have a significant effect on the pyrolysis kinetics and soot yield, while the addition of acetone to acetylene in a ratio 1 : 3 increases it only slightly. At the same time, the results of modeling using modern kinetic mechanisms predict in the presence of acetone additives a significant acceleration of pyrolysis and increase in the yield of polyaromatic compounds and soot particles in acetylene. This result indicates the need for further improvement of kinetic schemes for a successful description of the kinetics of self-decomposition of acetylene and soot formation. The results should be taken into account when developing promising energy cycles based on the energy of acetylene self-decomposition, as well as when analyzing the risks of spontaneous explosions in technological processes associated with its use.