75584 20190709135433.0 doi 10.1016/j.ijhydene.2017.02.043 sideral 99070 ART-2017-99070 eng Schaefer, S. Rice straw-based activated carbons doped with SiC for enhanced hydrogen adsorption 2017 Access copy available to the general public Unrestricted Activated carbons (ACs) based on rice straw (RS) were synthesised using potassium carbonate as activating agent at three different K2CO3/RS weight ratios. Morphological, chemical, structural as well as textural characterisations were carried out in order to establish relationships between the physicochemical properties of the materials and their hydrogen adsorption capacities. The ACs contained potassium and silicon as the main impurities. Si was identified by XRD in both phases of silicon dioxide and silicon carbide. The presence of SiC was particularly surprising due to the rather low activation temperature, much lower than what is usually required for SiC synthesis. ACs exhibited well-developed surface areas (approximatively 2000–2100 m2 g-1) and high micropore volumes, making them suitable for hydrogen storage applications. RS-based ACs showed higher hydrogen storage capacities than those previously obtained with KOH-activated sucrose. The latter exhibited hydrogen uptakes (excess, 10 MPa, 298 K) up to 0.55 wt. %, whereas 0.65 wt. % was measured for RS-based ACs in the same conditions. The higher hydrogen capacities and isosteric heats of adsorption found here were attributed to the presence of SiC. info:eu-repo/grantAgreement/EUR/COST/MP1103 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 4.229 2017 CHEMISTRY, PHYSICAL 42 / 146 = 0.288 2017 Q2 T1 ENERGY & FUELS 24 / 97 = 0.247 2017 Q1 T1 ELECTROCHEMISTRY 8 / 28 = 0.286 2017 Q2 T1 1.116 2017 Condensed Matter Physics 2017 Q1 Energy Engineering and Power Technology 2017 Q1 Fuel Technology 2017 Q1 Renewable Energy, Sustainability and the Environment 2017 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Muñiz, G. (orcid)0000-0002-2408-2528 Izquierdo, M.T. Mathieu, S. Ballinas-Casarrubias, M.L. González-Sánchez, G. Celzard, A. Fierro, V. 42, 16 (2017), 11534-11540 Int. j. hydrogen energy International Journal of Hydrogen Energy 0360-3199 229853 http://zaguan.unizar.es/record/75584/files/texto_completo.pdf Postprint 90276 http://zaguan.unizar.es/record/75584/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:75584 articulos driver 2019-07-09-11:32:52 ARTICLE