Multifunctional Pd/Ni–Co Catalyst for Hydrogen Production by Chemical Looping Coupled With Steam Reforming of Acetic Acid

• Published in: ChemSusChem
• Main Authors: Fermoso Domínguez, Javier, Gil Matellanes, María Victoria, Rubiera González, Fernando, Chen, De
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley-VCH 2014
• Subjects: Biomass; Hydrogen; Hydrotalcite; Oxygen carrier; Steam reforming; Arctic; Norway
• Online Access: http://hdl.handle.net/10261/139636; https://doi.org/10.1002/cssc.201402675

This is the accepted version of the following article: Fermoso, J., Gil, M. V., Rubiera, F. and Chen, D. (2014), Multifunctional Pd/Ni–Co Catalyst for Hydrogen Production by Chemical Looping Coupled With Steam Reforming of Acetic Acid. ChemSusChem, 7: 3063–3077. doi:10.1002/cssc.201402675, which has been published in final form at http://dx.doi.org/10.1002/cssc.201402675. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy High yield of high-purity H2 from acetic acid, a model compound of bio-oil obtained from the fast pyrolysis of biomass, was produced by sorption-enhanced steam reforming (SESR). An oxygen carrier was introduced into a chemical loop (CL) coupled to the cyclical SESR process to supply heat in situ for the endothermic sorbent regeneration to increase the energy efficiency of the process. A new multifunctional 1 %Pd/20 %Ni–20 %Co catalyst was developed for use both as oxygen carrier in the CL and as reforming catalyst in the SESR whereas a CaO-based material was used as CO2 sorbent. In the sorbent–air regeneration step, the Ni–Co atoms in the catalyst undergo strong exothermic oxidation reactions that provide heat for the CaO decarbonation. The addition of Pd to the Ni–Co catalyst makes the catalyst active throughout the whole SESR–CL cycle. Pd significantly promotes the reduction of Ni–Co oxides to metallic Ni–Co during the reforming stage, which avoids the need for a reduction step after regeneration. H2 yield above 90 % and H2 purity above 99.2 vol % were obtained. The authors acknowledge financial support from the Research Council of Norway (RCN). They thank Franefoss Miljøkalk A/S (Norway) for supplying Arctic dolomite. J. Fermoso acknowledges funding from the Spanish Ministry of Education, through the National Mobility Program of Human Resources of the National Plan of I-D+i 2008-2011. M.V. Gil acknowledges funding from the CSIC JAE-Doc program, Spain, co-financed by the European Social Fund, and support from the Research Council of ...