61867 20200221144231.0 doi 10.1016/j.enconman.2016.04.010 sideral 99557 ART-2016-99557 eng (orcid)0000-0003-3315-5933 Remon, J. Production of gaseous and liquid bio-fuels from the upgrading of lignocellulosic bio-oil in sub- and supercritical water: effect of operating conditions on the process 2016 Access copy available to the general public Unrestricted This work analyses the influence of the temperature (310–450 C), pressure (200–260 bar), catalyst/biooil mass ratio (0–0.25 g catalyst/g bio-oil), and reaction time (0–60 min) on the reforming in sub- and supercritical water of bio-oil obtained from the fast pyrolysis of pinewood. The upgrading experiments were carried out in a batch micro-bomb reactor employing a co-precipitated Ni–Co/Al–Mg catalyst. This reforming process turned out to be highly customisable for the valorisation of bio-oil for the production of either gaseous or liquid bio-fuels. Depending on the operating conditions and water regime (sub/supercritical), the yields to upgraded bio-oil (liquid), gas and solid varied as follows: 5–90%, 7–91% and 3–31%, respectively. The gas phase, having a LHV ranging from 2 to 17 MJ/m3 STP, was made up of a mixture of H2 (9–31 vol.%), CO2 (41–84 vol.%), CO (1–22 vol.%) and CH4 (1–45 vol.%). The greatest H2 production from bio-oil (76% gas yield with a relative amount of H2 of 30 vol.%) was achieved under supercritical conditions at a temperature of 339 C, 200 bar of pressure and using a catalyst/bio-oil ratio of 0.2 g/g for 60 min. The amount of C, H and O (wt.%) in the upgraded bio-oil varied from 48 to 74, 4 to 9 and 13 to 48, respectively. This represents an increase of up to 37% and 171% in the proportions of C and H, respectively, as well as a decrease of up to 69% in the proportion of O. The HHV of the treated bio-oil shifted from 20 to 35 MJ/kg, which corresponds to an increase of up to 89% with respect to the HHV of the original bio-oil. With a temperature of around 344 C, a pressure of 233 bar, a catalyst/bio-oil ratio of 0.16 g/g and a reaction time of 9 min a compromise was reached between the yield and the quality of the upgraded liquid, enabling the transformation of 62% of the bio-oil into liquid with a HHV (29 MJ/kg) about twice as high as that of the original feedstock (17 MJ/kg). info:eu-repo/grantAgreement/ES/DGA/GPT 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/ENE2013-41523-R info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 5.589 2016 ENERGY & FUELS 10 / 92 = 0.109 2016 Q1 T1 THERMODYNAMICS 2 / 58 = 0.034 2016 Q1 T1 MECHANICS 4 / 133 = 0.03 2016 Q1 T1 2.232 2016 Energy Engineering and Power Technology 2016 Q1 Renewable Energy, Sustainability and the Environment 2016 Q1 Nuclear Energy and Engineering 2016 Q1 Fuel Technology 2016 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Arcelus-Arrillaga, P. (orcid)0000-0001-7115-9025 Garcia, L. Universidad de Zaragoza (orcid)0000-0002-5959-3168 Arauzo, J. Universidad de Zaragoza 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 119 (2016), [59 pp.] Energy convers. manag. Energy Conversion and Management 0196-8904 689111 http://zaguan.unizar.es/record/61867/files/texto_completo.pdf Postprint 79974 http://zaguan.unizar.es/record/61867/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:61867 articulos driver 2020-02-21-13:19:29 ARTICLE