Microwave-assisted, performance-advantaged electrification of propane dehydrogenation

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...

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Autores: Kwak, Yeonsu, Wang, Cong, Kavale, Chaitanya A., Yu, Kewei, Selvam, Esun, Mallada, Reyes, Santamaria, Jesus, Julian, Ignacio, Catala-Civera, Jose M., Goyal, Himanshu, Zheng, Weiqing, Vlachos, Dionisios G.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Recursos:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:128094
Acesso em linha:http://zaguan.unizar.es/record/128094
Access Level:acceso abierto
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spelling Microwave-assisted, performance-advantaged electrification of propane dehydrogenationKwak, YeonsuWang, CongKavale, Chaitanya A.Yu, KeweiSelvam, EsunMallada, ReyesSantamaria, JesusJulian, IgnacioCatala-Civera, Jose M.Goyal, HimanshuZheng, WeiqingVlachos, Dionisios G.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.2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://zaguan.unizar.es/record/128094reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/semantics/openAccessoai:zaguan.unizar.es:1280942026-05-29T13:59:51Z
dc.title.none.fl_str_mv Microwave-assisted, performance-advantaged electrification of propane dehydrogenation
title Microwave-assisted, performance-advantaged electrification of propane dehydrogenation
spellingShingle Microwave-assisted, performance-advantaged electrification of propane dehydrogenation
Kwak, Yeonsu
title_short Microwave-assisted, performance-advantaged electrification of propane dehydrogenation
title_full Microwave-assisted, performance-advantaged electrification of propane dehydrogenation
title_fullStr Microwave-assisted, performance-advantaged electrification of propane dehydrogenation
title_full_unstemmed Microwave-assisted, performance-advantaged electrification of propane dehydrogenation
title_sort Microwave-assisted, performance-advantaged electrification of propane dehydrogenation
dc.creator.none.fl_str_mv Kwak, Yeonsu
Wang, Cong
Kavale, Chaitanya A.
Yu, Kewei
Selvam, Esun
Mallada, Reyes
Santamaria, Jesus
Julian, Ignacio
Catala-Civera, Jose M.
Goyal, Himanshu
Zheng, Weiqing
Vlachos, Dionisios G.
author Kwak, Yeonsu
author_facet Kwak, Yeonsu
Wang, Cong
Kavale, Chaitanya A.
Yu, Kewei
Selvam, Esun
Mallada, Reyes
Santamaria, Jesus
Julian, Ignacio
Catala-Civera, Jose M.
Goyal, Himanshu
Zheng, Weiqing
Vlachos, Dionisios G.
author_role author
author2 Wang, Cong
Kavale, Chaitanya A.
Yu, Kewei
Selvam, Esun
Mallada, Reyes
Santamaria, Jesus
Julian, Ignacio
Catala-Civera, Jose M.
Goyal, Himanshu
Zheng, Weiqing
Vlachos, Dionisios G.
author2_role author
author
author
author
author
author
author
author
author
author
author
description 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.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/128094
url http://zaguan.unizar.es/record/128094
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv
publisher.none.fl_str_mv
dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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