109526 20230519145405.0 doi 10.1021/acs.energyfuels.0c03387 sideral 123291 ART-2021-123291 eng Benés, M. Experimental Study of the Pyrolysis of NH3under Flow Reactor Conditions 2021 Access copy available to the general public Unrestricted The possibility of using ammonia (NH3), as a fuel and as an energy carrier with low pollutant emissions, can contribute to the transition to a low-carbon economy. To use ammonia as fuel, knowledge about the NH3 conversion is desired. In particular, the conversion of ammonia under pyrolysis conditions could be determinant in the description of its combustion mechanism. In this work, pyrolysis experiments of ammonia have been performed in both a quartz tubular flow reactor (900-1500 K) and a non-porous alumina tubular flow reactor (900-1800 K) using Ar or N2 as bath gas. An experimental study of the influence of the reactor material (quartz or alumina), the bulk gas (N2 or Ar), the ammonia inlet concentration (1000 and 10a 000 ppm), and the gas residence time [2060/T (K)-8239/T (K) s] on the pyrolysis process has been performed. After the reaction, the resulting compounds (NH3, H2, and N2) are analyzed in a gas chromatograph/thermal conductivity detector chromatograph and an infrared continuous analyzer. Results show that H2 and N2 are the main products of the thermal decomposition of ammonia. Under the conditions of the present work, differences between working in a quartz or non-porous alumina reactor are not significant under pyrolysis conditions for temperatures lower than 1400 K. Neither the bath gas nor the ammonia inlet concentration influence the ammonia conversion values. For a given temperature and under all conditions studied, conversion of ammonia increases with an increasing gas residence time, which results into a narrower temperature window for NH3 conversion. info:eu-repo/grantAgreement/ES/DGA-FEDER/Construyendo Europa desde Aragón info:eu-repo/grantAgreement/ES/DGA-FEDER/T22-17R info:eu-repo/grantAgreement/ES/MCIU-FEDER/RTI2018-098856-B-100 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 4.654 2021 ENGINEERING, CHEMICAL 45 / 143 = 0.315 2021 Q2 T1 ENERGY & FUELS 63 / 119 = 0.529 2021 Q3 T2 0.822 2021 Chemical Engineering (miscellaneous) 2021 Q1 Energy Engineering and Power Technology 2021 Q1 6.3 2021 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Pozo, G. Abián, M. Universidad de Zaragoza (orcid)0000-0001-7559-9669 Millera, Á. Universidad de Zaragoza (orcid)0000-0001-5426-6486 Bilbao, R. Universidad de Zaragoza (orcid)0000-0002-5420-0943 Alzueta, M.U. Universidad de Zaragoza (orcid)0000-0003-4679-5761 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 35, 9 (2021), 7193–7200 Energy fuels Energy and Fuels 0887-0624 884988 http://zaguan.unizar.es/record/109526/files/texto_completo.pdf Postprint 3106068 http://zaguan.unizar.es/record/109526/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:109526 articulos driver 2023-05-18-13:45:36 ARTICLE