78846 20230926093528.0 doi 10.1126/sciadv.aau9000 sideral 111246 ART-2019-111246 eng Ramirez, A. (orcid)0000-0001-5036-1355 Escaping undesired gas-phase chemistry: Microwave-driven selectivity enhancement in heterogeneous catalytic reactors 2019 Access copy available to the general public Unrestricted Research in solid-gas heterogeneous catalytic processes is typically aimed toward optimization of catalyst composition to achieve a higher conversion and, especially, a higher selectivity. However, even with the most selective catalysts, an upper limit is found: Above a certain temperature, gas-phase reactions become important and their effects cannot be neglected. Here, we apply a microwave field to a catalyst-support ensemble capable of direct microwave heating (MWH). We have taken extra precautions to ensure that (i) the solid phase is free from significant hot spots and (ii) an accurate estimation of both solid and gas temperatures is obtained. MWH allows operating with a catalyst that is significantly hotter than the surrounding gas, achieving a high conversion on the catalyst while reducing undesired homogeneous reactions. We demonstrate the concept with the CO 2 -mediated oxidative dehydrogenation of isobutane, but it can be applied to any system with significant undesired homogeneous contributions. info:eu-repo/grantAgreement/EUR/ERC/HECTOR-267626 info:eu-repo/grantAgreement/ES/MINECO-FEDER/CTQ2015-65226 info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 13.116 2019 MULTIDISCIPLINARY SCIENCES 4 / 71 = 0.056 2019 Q1 T1 6.062 2019 Multidisciplinary 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Hueso, J.L. (orcid)0000-0002-4546-4111 Abian, M. Universidad de Zaragoza (orcid)0000-0001-7559-9669 Alzueta, M.U. Universidad de Zaragoza (orcid)0000-0003-4679-5761 Mallada, R. Universidad de Zaragoza (orcid)0000-0002-4758-9380 Santamaria, J. Universidad de Zaragoza (orcid)0000-0002-8701-9745 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 5, 3 (2019), eaau9000 [7 pp] Sci. adv. Science advances 2375-2548 252364 http://zaguan.unizar.es/record/78846/files/texto_completo.pdf Versión publicada 143490 http://zaguan.unizar.es/record/78846/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:78846 articulos driver 2023-09-26-09:29:41 ARTICLE