62046 20200221144255.0 doi 10.1016/j.fuproc.2016.08.030 sideral 96666 ART-2016-96666 eng (orcid)0000-0003-3315-5933 Remón, J. Bio-oil upgrading in supercritical water using Ni-Co catalysts supported on carbon nanofibres 2016 Access copy available to the general public Unrestricted This work addresses the preparation, characterisation and screening of different Ni-Co catalysts supported on carbon nanofibres (CNFs) for use in the upgrading of bio-oil in supercritical water. The aim is to improve the physicochemical properties of bio-oil so that it can be used as a fuel. The CNFs were firstly oxidised in HNO3 and afterwards subjected to a thermal treatment to selectively modify their surface chemistry prior to the incorporation of the metal active phase (Ni-Co). The CNFs and the supported catalysts were thoroughly characterised by several techniques, which allowed a relationship to be established between the catalyst properties and the upgrading results. The use of Ni-Co/CNFs for bio-oil upgrading in supercritical water (SCW) significantly improved the properties of the original feedstock. In addition, the thermal treatment to which the fibres were subjected exerted a significant influence on their catalytic properties. An increase in the severity of the thermal treatment led to a substantial reduction in the oxygen content of the CNFs, mainly due to the removal of the less stable oxygen surface groups, which allowed their surface polarity to decrease. This decrease resulted in less formation of solid products. However, it also reduced the H/C and increased the O/C ratios of the upgraded liquid. Therefore, a compromise between the yield and the properties of the upgraded bio-oil was achieved with a Ni-Co supported on a CNF with a moderate amount of oxygen surface groups. info:eu-repo/grantAgreement/ES/MINECO/BES-2011-044856 info:eu-repo/grantAgreement/ES/MINECO/EEBB-I-14-08688 info:eu-repo/grantAgreement/ES/MINECO/ENE2010-18985 info:eu-repo/grantAgreement/ES/MINECO/ENE2011-28318 info:eu-repo/grantAgreement/ES/MINECO/ENE2013-41523-R info:eu-repo/grantAgreement/ES/MINECO/ENE2014-52189-C2-1-R info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 3.752 2016 CHEMISTRY, APPLIED 8 / 72 = 0.111 2016 Q1 T1 ENGINEERING, CHEMICAL 17 / 135 = 0.126 2016 Q1 T1 ENERGY & FUELS 23 / 92 = 0.25 2016 Q1 T1 1.397 2016 Chemical Engineering (miscellaneous) 2016 Q1 Fuel Technology 2016 Q1 Energy Engineering and Power Technology 2016 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0002-5959-3168 Arauzo, J. Universidad de Zaragoza (orcid)0000-0001-7115-9025 García, L. Universidad de Zaragoza Arcelus-Arrillaga, P. Millan, M. Suelves, I. Pinilla, J. L. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 154 (2016), [36 pp.] Fuel process. technol. Fuel Processing Technology 0378-3820 1187626 http://zaguan.unizar.es/record/62046/files/texto_completo.pdf Postprint 73982 http://zaguan.unizar.es/record/62046/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:62046 articulos driver 2020-02-21-13:29:33 ARTICLE