87692 20200716101432.0 doi 10.1016/j.ijhydene.2019.01.078 sideral 109876 ART-2019-109876 eng (orcid)0000-0003-2614-9228 Colom Díaz, Juan Manuel Universidad de Zaragoza High pressure study of H2 oxidation and its interaction with NO 2019 Access copy available to the general public Unrestricted The present study deals with the oxidation of H2 at high pressure and its interaction with NO. The high pressure behavior of the H2/NOx/O2 system has been tested over a wide range of temperatures (500–1100 K) and different air excess ratios (lambda = 0.5–6.4). The experiments have been carried out in a tubular flow reactor at 10, 20 and 40 bar NO has been found to promote H2 oxidation under oxidizing conditions, reacting with HO2 radicals to form the more active OH radical, which enhances the conversion of hydrogen. The onset temperature for hydrogen oxidation, when doped with NO, was approximately the same at all stoichiometries at high pressures (40 bar), and shifted to higher temperatures as the pressure decreases. The experimental results have been analyzed with an updated kinetic model. The reaction NO + NO + O2 <--> NO2 + NO2 has been found to be important at all conditions studied and its kinetic parameters HNO + H2 <--> NH + H2O have been modified, according to its activation energy uncertainty. Furthermore, the kinetic parameters of reaction have been estimated, in order to obtain a good prediction of the oxidation behavior of H2 and NO conversion under reducing conditions. The kinetic model shows a good agreement between experimental results and model predictions over a wide range of conditions. info:eu-repo/grantAgreement/ES/DGA/GPT info:eu-repo/grantAgreement/ES/MINECO-FEDER/BES-2016-076610 info:eu-repo/grantAgreement/ES/MINECO-FEDER/CTQ2015-65226-PPQ info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 4.939 2019 1.141 2019 ELECTROCHEMISTRY 7 / 27 = 0.259 2019 Q2 T1 Condensed Matter Physics 2019 Q1 ENERGY & FUELS 30 / 112 = 0.268 2019 Q2 T1 Energy Engineering and Power Technology 2019 Q1 CHEMISTRY, PHYSICAL 48 / 158 = 0.304 2019 Q2 T1 Fuel Technology 2019 Q1 Renewable Energy, Sustainability and the Environment 2019 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0001-5426-6486 Millera, Ángela Universidad de Zaragoza (orcid)0000-0002-5420-0943 Bilbao, Rafael Universidad de Zaragoza (orcid)0000-0003-4679-5761 Alzueta, María Uxue Universidad de Zaragoza 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 5005 790 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Tecnologi. Medio Ambiente 44, 12 (2019), 6325-6332 Int. j. hydrogen energy International Journal of Hydrogen Energy 0360-3199 775833 http://zaguan.unizar.es/record/87692/files/texto_completo.pdf Postprint 284105 http://zaguan.unizar.es/record/87692/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:87692 articulos driver 2020-07-16-08:51:30 ARTICLE