1. Instituto Nacional del Carbón, (CSIC), C/Francisco Pintado Fe, No. 26, 33011 Oviedo, Spain, Instituto de Carboquímica, (CSIC), C/Miguel Luesma Castán No. 4, 50015, Zaragoza Spain, CANMET Energy Technology Centre, Natural Resources Canada, 1 Haanel Drive, Ottawa Ontario, K1A 1M1 Canada, and CIRCE, Universidad de Zaragoza, CPS, 50015, Zaragoza, Spain