128094 20241125101159.0 doi 10.1126/sciadv.adi8219 sideral 135267 ART-2023-135267 eng Kwak, Yeonsu Microwave-assisted, performance-advantaged electrification of propane dehydrogenation 2023 Access copy available to the general public Unrestricted Nonoxidative propane dehydrogenation (PDH) produces on-site propylene for value-added chemicals. While commercial, its modest selectivity and catalyst deactivation hamper the process efficiency and limit operation to lower temperatures. We demonstrate PDH in a microwave (MW)–heated reactor over PtSn/SiO2 catalyst pellets loaded in a SiC monolith acting as MW susceptor and a heat distributor while ensuring comparable conditions with conventional reactors. Time-on-stream experiments show active and stable operation at 500°C without hydrogen addition. Upon increasing temperature or feed partial pressure at high space velocity, catalysts under MWs show resistance in coking and sintering, high activity, and selectivity, starkly contrasting conventional reactors whose catalyst undergoes deactivation. Mechanistic differences in coke formation are exposed. Gas-solid temperature gradients are computationally investigated, and nanoscale temperature inhomogeneities are proposed to rationalize the different performances of the heating modes. The approach highlights the great potential of electrification of endothermic catalytic reactions. info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 11.7 2023 MULTIDISCIPLINARY SCIENCES 11 / 134 = 0.082 2023 Q1 T1 4.483 2023 Multidisciplinary 2023 Q1 21.4 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Wang, Cong Kavale, Chaitanya A. Yu, Kewei Selvam, Esun Mallada, Reyes Universidad de Zaragoza (orcid)0000-0002-4758-9380 Santamaria, Jesus Universidad de Zaragoza (orcid)0000-0002-8701-9745 Julian, Ignacio (orcid)0000-0003-3211-0485 Catala-Civera, Jose M. Goyal, Himanshu Zheng, Weiqing Vlachos, Dionisios G. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 9, 37 (2023), eadi8219 [12 pp.] Sci. adv. Science advances 2375-2548 2106854 http://zaguan.unizar.es/record/128094/files/texto_completo.pdf Versión publicada 3667155 http://zaguan.unizar.es/record/128094/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:128094 articulos driver 2024-11-22-12:10:56 ARTICLE