High pressure study of H2 oxidation and its interaction with NO

Colom Díaz, Juan Manuel (Universidad de Zaragoza) ; Millera, Ángela (Universidad de Zaragoza) ; Bilbao, Rafael (Universidad de Zaragoza) ; Alzueta, María Uxue (Universidad de Zaragoza)

Resumen: 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.

Idioma: Inglés

DOI: 10.1016/j.ijhydene.2019.01.078

Año: 2019

Publicado en: International Journal of Hydrogen Energy 44, 12 (2019), 6325-6332
ISSN: 0360-3199

Factor impacto JCR: 4.939 (2019)

Categ. JCR: ELECTROCHEMISTRY rank: 7 / 27 = 0.259 (2019) - Q2 - T1
Categ. JCR: ENERGY & FUELS rank: 30 / 112 = 0.268 (2019) - Q2 - T1
Categ. JCR: CHEMISTRY, PHYSICAL rank: 48 / 158 = 0.304 (2019) - Q2 - T1

Factor impacto SCIMAGO: 1.141 - Condensed Matter Physics (Q1) - Energy Engineering and Power Technology (Q1) - Fuel Technology (Q1) - Renewable Energy, Sustainability and the Environment (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA/GPT
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/BES-2016-076610
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/CTQ2015-65226-PPQ

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Tecnologi. Medio Ambiente (Dpto. Ing.Quím.Tecnol.Med.Amb.)