Available online xxxKeywords: Biogas Dry reforming Hydrogen Membranes Fluidized bed a b s t r a c t Biogas is a renewable resource obtained mainly from the anaerobic fermentation of agroindustrial and anthropogenic residues. The production of hydrogen by dry reforming of methane represents a potential application for this renewable energy carrier. This could play a positive contribution towards meeting the challenge of providing a global supply of energetically sustainable and environmentally friendly energy. This work combines a catalytic reaction, a separation and the catalyst regeneration in a single reactor. To this end, a two zone fluidized bed reactor (TZFBR) with hydrogen selective membranes has been employed (TZFBR þ MB). The operating conditions for the process of dry reforming of biogas have been optimized experimentally, both in TZFBR and TZFBR þ MB. Several catalysts were prepared (Ni/Al 2 O 3 , NieCe/Al 2 O 3 , NieCo/Al 2 O 3 ), characterized and tested in reactions in both TZFBR and in TZFBR þ MB. Finally, the influence of using oxygen or carbon dioxide as regenerating gases in the process has been studied. Experimental results show the feasibility of using CO 2 for in situ catalyst regeneration, avoiding the potential problems associated with the use of O 2 .ScienceDirect j o urn al h om epa ge: www.elsev ier.com/locate/he i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y x x x ( 2 0 1 7 ) 1 e9 http://dx.

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