Microwave-assisted, performance-advantaged electrification of propane dehydrogenation
Kwak, Yeonsu ; Wang, Cong ; Kavale, Chaitanya A. ; Yu, Kewei ; Selvam, Esun ; Mallada, Reyes (Universidad de Zaragoza) ; Santamaria, Jesus (Universidad de Zaragoza) ; Julian, Ignacio ; Catala-Civera, Jose M. ; Goyal, Himanshu ; Zheng, Weiqing ; Vlachos, Dionisios G.
Resumen: 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.
Idioma: Inglés
DOI: 10.1126/sciadv.adi8219
Año: 2023
Publicado en: Science advances 9, 37 (2023), eadi8219 [12 pp.]
ISSN: 2375-2548
Factor impacto JCR: 11.7 (2023)
Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 11 / 134 = 0.082 (2023) - Q1 - T1
Factor impacto CITESCORE: 21.4 - Multidisciplinary (Q1)
Factor impacto SCIMAGO: 4.483 - Multidisciplinary (Q1)
Tipo y forma: Article (Published version)
Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2024-11-22-12:10:56)
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Idioma: Inglés
DOI: 10.1126/sciadv.adi8219
Año: 2023
Publicado en: Science advances 9, 37 (2023), eadi8219 [12 pp.]
ISSN: 2375-2548
Factor impacto JCR: 11.7 (2023)
Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 11 / 134 = 0.082 (2023) - Q1 - T1
Factor impacto CITESCORE: 21.4 - Multidisciplinary (Q1)
Factor impacto SCIMAGO: 4.483 - Multidisciplinary (Q1)
Tipo y forma: Article (Published version)
Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2024-11-22-12:10:56)
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Record created 2023-11-08, last modified 2024-11-25