1. Institute of Chemistry and Chemical Technology, Lviv Polytechnic National University, Lviv, Ukraine
2. Institute of Building and Environmental Engineering, Lviv Polytechnic National University, Lviv, Ukraine
3. Department of Oil, Gas and Solid Fuel Processing, National Technical University «Kharkiv Polytechnical Institute», Kharkiv, Ukraine
4. School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai, Malaysia