1. Department of Engineering and Management of Energy Resources, University of Western Macedonia, Sialvera & Bakola Str., 50100 Kozani, Greece, Thermi Business Incubator, Process Systems Enterprise Ltd, 9th Km Thessaloniki-Thermi, 57001 Thessaloniki-Thermi, Greece, Centre for Process Systems Engineering, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K.