1 Laboratory of Separation and Reaction Engineering, Associate Laboratory LSRE-LCM, Department of Chemical Engineering, Faculty of Engineering, University of Porto Rua Dr. Roberto Frias 4200-465 Porto Portugal.
2 School of Engineering (ISEP), Polytechnic of Porto (P.Porto) R. Dr. António Bernardino de Almeida 431 4249-015 Porto Portugal afccu@isep.ipp.pt +351 22 83 21 159 +351 22 83 41 904.
3 Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada Avenida de Fuentenueva, s/n 18071 Granada Spain semoto@ugr.es +34 958248526 +34 958240443.
4 LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto Rua Dr. Roberto Frias 4200-465 Porto Portugal.