1. Instituto Nacional del Carbón, (CSIC), C/Francisco Pintado Fe, No.
26, 33011 Oviedo, Spain
2. Instituto de Carboquímica, CSIC, C/Miguel Luesma Castán, No. 4, 50015 Zaragoza,
Spain
3. CanmetENERGY, Natural Resources Canada, 1 Haanel Drive, Ottawa, Ontario, Canada
K1A 1M1