1. LUKOIL Neftohim Burgas, 8104 Burgas, Bulgaria
2. University “Prof. Dr. Assen Zlatarov”, 8010 Burgas, Bulgaria
3. Ufa State Petroleum Technological University, 1 Kosmonavtov St., Ufa,450062 Russian Federation
4. University of Chemical Technology and Metallurgy, 1756 Sofia, Bulgaria
5. Petroleum
and Petrochemistry Department, Kazan National Research Technological University, 420015 Kazan, Russia
6. Department
of Chemical Engineering, University of Calgary 2015 University Drive NW, Calgary, Canada T2N
1N4