1. Department of Mechanical Engineering, Indian Institute of Technology (BHU), Varanasi-221005, India
2. Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
3. Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, Mol, 2400 Belgium
4. Department of Mechanical Engineering, Dr. Vishwanath Karad MIT World Peace University Pune, India