58483 20200221144127.0 doi 10.1016/j.enconman.2015.11.070 sideral 93237 ART-2016-93237 eng (orcid)0000-0003-3315-5933 Remón, J. Production of gaseous and liquid chemicals by aqueous phase reforming of crude glycerol: Influence of operating conditions on the process 2016 Access copy available to the general public Unrestricted The present work studies the influence of the temperature (200-240 °C), pressure (38-50 bar), glycerol concentration (10-50 wt.%) and mass of catalyst/ glycerol mass flow rate ratio (W/mglycerol = 10-40 g catalyst min/g glycerol) during the aqueous phase reforming (APR) of a glycerol solution obtained from the production of biodiesel. The operating conditions exerted a statistically significant influence on the reforming results. Specifically, the global glycerol conversion and the carbon converted into gas and liquid products varied as follows: 4-100%, 1-80% and 16-93%, respectively. The gas phase was made up of H2 (8-55 vol.%), CO2 (34-66 vol.%), CO (0-4 vol.%) and CH4 (6-45 vol.%). The liquid phase consisted of a mixture of alcohols (monohydric: methanol and ethanol; and polyhydric: 1, 2-propanediol, 1, 2-ethanediol, 2, 3-butanediol), aldehydes (acetaldehyde), ketones (C3-ketones: acetone and 2-propanone-1-hydroxy; C4-ketones: 2-butanone-3-hydroxy and 2-butanone-1-hydroxy; and cyclic ketones), carboxylic acids (acetic and propionic acids) and esters (1, 2, 3-propanetriol-monoacetate), together with unreacted glycerol and water. The relative amount (free of water and un-reacted glycerol) of these compounds in the liquid phase was as follows: monohydric alcohols: 4-47%, polyhydric-alcohols: 14-68%, aldehydes: 0-5%, C3-ketones: 2-33%, C4-ketones: 0-10%, ciclo-ketones: 0-6%, carboxylic acids: 2-43%, and esters: 0-46%. This process turned out to be highly customisable for the valorisation of crude glycerol for the production of either gaseous or liquid products. Gas production is favoured at a low pressure (39 bar), high temperature (238 °C), high W/mglycerol ratio (38 g catalyst min/g glycerol) and employing a 15 wt.% glycerol solution. A high pressure (45 bar), medium temperature (216 °C), medium W/mglycerol ratio (22 g catalyst min/g glycerol) and the feeding of a 16 wt.% glycerol solution favours the production of liquid products. 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 Giménez, J.R. Valiente, A. (orcid)0000-0001-7115-9025 García, 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 110 (2016), 90-112 Energy convers. manag. Energy Conversion and Management 0196-8904 2157351 http://zaguan.unizar.es/record/58483/files/texto_completo.pdf Postprint 66117 http://zaguan.unizar.es/record/58483/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:58483 articulos driver 2020-02-21-13:04:08 ARTICLE