V. Baranov Ivan Franko National University of Lviv Ukraine
A. Banya Department of Physico-Сhemistry of Combustive Minerals, L. M. Lytvynenko InPOCC, NAS of Ukraine Ukraine
O. Karpenko National University “Lviv Polytechnic” Ukraine
M. Prystai Department of Physico-Сhemistry of Combustive Minerals, L. M. Lytvynenko InPOCC, NAS of Ukraine Ukraine
E. Karpenko Department of Physico-Сhemistry of Combustive Minerals, L. M. Lytvynenko InPOCC, NAS of Ukraine Ukraine