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Hydrogen production from methane and natural gas steam reforming in conventional and microreactor reaction systems
Authors:U Izquierdo  VL Barrio  JF Cambra  J Requies  MB Güemez  PL Arias  G Kolb  R Zapf  AM Gutiérrez  JR Arraibi
Affiliation:1. Faculty of Engineering, University of the Basque Country (UPV/EHU), C/Alda. Urquijo s/n, 48013 Bilbao, Spain;2. Institut für Mikrotechnik Mainz GmbH, Carl-Zeiss-Str. 18-20, 55129 Mainz, Germany;3. Naturgas Energía Distribución, Plz. Pio Baroja 3, 48001 Bilbao, Spain
Abstract:Ni-based (over MgO and Al2O3) and noble metal-based (Pd and Pt over Al2O3) catalysts were prepared by wet impregnation method and thereafter impregnated in microreactors. The catalytic activity was measured at several temperatures, atmospheric pressure and different steam to carbon, S/C, ratios. These conditions were the same for conventional, fixed bed reactor system, and microreactors. Weight hourly space velocity, WHSV, was maintained equal in order to compare the activity results from both reaction systems. For microreactor systems, similar activities of Ni-based catalyst were measured in the steam methane reforming (SMR) activity tests, but not in the case of natural gas steam reforming tests. When noble metal-based catalysts were used in the conventional reaction system no significant activity was measured but all catalysts showed some activity when they were tested in the microreactor systems. The analysis by SEM and TEM revealed a carbon-free surface for Ni-based catalyst as well as carbon filaments growth in case of noble metal-based catalysts.
Keywords:Hydrogen  Microreactor  Natural gas  Methane  Steam reforming
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