D.D. Assylkhanova1, M. Najipkyzy2, A. Nurgain3, A.R. Seitkazinova4, A.I. Niyazbaeva5,
A.A. Zekenova6, S.V. Agasieva7, G.A. Gudkov8

1, 6, 7 Peoples' Friendship University of Russia (Moscow, Russia)
1, 2, 4–6 Al-Farabi Kazakh National University (Almaty, Kazakhstan)
1–3 RSE on PCV Institute of Combustion (Almaty, Kazakhstan)
8 Hyperion ltd (Moscow, Russia)