Influence of precipitating agents on the performance of iron catalysts on ethylbenzene dehydrogenation
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2021 |
| Outros Autores: | , , |
| Tipo de documento: | Artigo |
| Idioma: | eng por |
| Título da fonte: | Research, Society and Development |
| Texto Completo: | https://rsdjournal.org/index.php/rsd/article/view/12425 |
Resumo: | Catalytic dehydrogenation of ethylbenzene with steam is the dominant technology for the industrial production of styrene, which is a raw material extensively used in the manufacture of plastics. The commercial catalyst consists of iron oxide doped with potassium and chromium and has a low specific surface area, in addition to being susceptible to deactivation. In order to obtain more efficient catalysts than those available commercially, the effect of the precipitating agent on the performance of iron catalysts, based on hematite, was studied in this work. The samples were prepared by the sol-gel method, using ammonium hydroxide, potassium hydroxide and potassium carbonate as precipitating agents and evaluated in the dehydrogenation of ethylbenzene at 480, 530, 580 and 630 oC. It was observed that the most suitable precipitating agent was potassium carbonate, which produced the most active catalyst, with the highest specific surface area and resistance to reduction. At the temperature of industrial processes (530 oC), this catalyst was four times more active than a commercial sample. |
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Influence of precipitating agents on the performance of iron catalysts on ethylbenzene dehydrogenationInfluencia de los agentes precipitantes sobre el desempeño de los catalizadores de hierro en la deshidrogenación del etilbencenoInfluência de agentes precipitantes no desempenho de catalisadores de ferro na desidrogenação do etilbenzeno EstirenoEtilbencenoCatalizadores de hierroHematitaÓxido de hierro.EstirenoEtilbenzenoCatalisadores de ferroHematitaÓxido de ferro.StyreneEthylbenzeneIron catalystsHematiteIron oxide.Catalytic dehydrogenation of ethylbenzene with steam is the dominant technology for the industrial production of styrene, which is a raw material extensively used in the manufacture of plastics. The commercial catalyst consists of iron oxide doped with potassium and chromium and has a low specific surface area, in addition to being susceptible to deactivation. In order to obtain more efficient catalysts than those available commercially, the effect of the precipitating agent on the performance of iron catalysts, based on hematite, was studied in this work. The samples were prepared by the sol-gel method, using ammonium hydroxide, potassium hydroxide and potassium carbonate as precipitating agents and evaluated in the dehydrogenation of ethylbenzene at 480, 530, 580 and 630 oC. It was observed that the most suitable precipitating agent was potassium carbonate, which produced the most active catalyst, with the highest specific surface area and resistance to reduction. At the temperature of industrial processes (530 oC), this catalyst was four times more active than a commercial sample.La deshidrogenación catalítica del etilbenceno, con vapor de agua, es la tecnología dominante para la producción industrial de estireno, que es una materia prima muy utilizada en la fabricación de plásticos. El catalizador comercial consiste en óxido de hierro dopado con potasio y cromo y tiene una superficie específica baja, además de ser susceptible de desactivación. Con el fin de obtener catalizadores más eficientes que los disponibles comercialmente, este trabajo estudió el efecto del agente precipitante sobre el desempeño de los catalizadores de hierro, basados en hematita. Las muestras se prepararon por el método sol-gel, utilizando hidróxido de amonio, hidróxido de potasio y carbonato de potasio como agentes precipitantes y se evaluaron en la deshidrogenación de etilbenceno a 480, 530, 580 y 630 oC. Se observó que el agente precipitante más adecuado era el carbonato de potasio, que producía el catalizador más activo, con mayor superficie específica y resistencia a la reducción. A la temperatura de los procesos industriales (530 oC), este catalizador era cuatro veces más activo que una muestra comercial.A desidrogenação catalítica do etilbenzeno, com vapor de água, é a tecnologia dominante para a produção industrial de estireno, que é uma matéria-prima extensivamente usada na manufatura de plásticos. O catalisador comercial é constituído de óxido de ferro dopado com potássio e cromo e apresenta baixa área superficial específica, além de ser susceptível à desativação. Visando à obter catalisadores mais eficientes que aqueles disponíveis comercialmente estudou-se, neste trabalho, o efeito do agente precipitante sobre o desempenho de catalisadores de ferro, baseados em hematita. As amostras foram preparadas pelo método sol-gel, usando hidróxido de amônio, hidróxido de potássio e carbonato de potássio como agentes precipitantes e avaliadas na desidrogenação do etilbenzeno a 480, 530, 580 e 630 oC. Observou-se que o agente precipitante mais adequado foi o carbonato de potássio, que produziu o catalisador mais ativo, com área superficial específica e resistência à redução mais elevadas. Na temperatura dos processos industriais (530 oC), esse catalisador foi quatro vezes mais ativo que uma amostra comercial.Research, Society and Development2021-02-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/1242510.33448/rsd-v10i2.12425Research, Society and Development; Vol. 10 No. 2; e25810212425Research, Society and Development; Vol. 10 Núm. 2; e25810212425Research, Society and Development; v. 10 n. 2; e258102124252525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIengporhttps://rsdjournal.org/index.php/rsd/article/view/12425/11240https://rsdjournal.org/index.php/rsd/article/view/12425/11241Copyright (c) 2021 Maria do Carmo Rangel Varela; Bruna Caroline de Oliveira Barral; Simone Pereira de Lima ; Sirlene Barbosa Lima https://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessVarela, Maria do Carmo RangelBarral, Bruna Caroline de Oliveira Lima , Simone Pereira de Lima , Sirlene Barbosa 2021-03-02T09:32:39Zoai:ojs.pkp.sfu.ca:article/12425Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:34:00.272953Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false |
| dc.title.none.fl_str_mv |
Influence of precipitating agents on the performance of iron catalysts on ethylbenzene dehydrogenation Influencia de los agentes precipitantes sobre el desempeño de los catalizadores de hierro en la deshidrogenación del etilbenceno Influência de agentes precipitantes no desempenho de catalisadores de ferro na desidrogenação do etilbenzeno |
| title |
Influence of precipitating agents on the performance of iron catalysts on ethylbenzene dehydrogenation |
| spellingShingle |
Influence of precipitating agents on the performance of iron catalysts on ethylbenzene dehydrogenation Varela, Maria do Carmo Rangel Estireno Etilbenceno Catalizadores de hierro Hematita Óxido de hierro. Estireno Etilbenzeno Catalisadores de ferro Hematita Óxido de ferro. Styrene Ethylbenzene Iron catalysts Hematite Iron oxide. |
| title_short |
Influence of precipitating agents on the performance of iron catalysts on ethylbenzene dehydrogenation |
| title_full |
Influence of precipitating agents on the performance of iron catalysts on ethylbenzene dehydrogenation |
| title_fullStr |
Influence of precipitating agents on the performance of iron catalysts on ethylbenzene dehydrogenation |
| title_full_unstemmed |
Influence of precipitating agents on the performance of iron catalysts on ethylbenzene dehydrogenation |
| title_sort |
Influence of precipitating agents on the performance of iron catalysts on ethylbenzene dehydrogenation |
| author |
Varela, Maria do Carmo Rangel |
| author_facet |
Varela, Maria do Carmo Rangel Barral, Bruna Caroline de Oliveira Lima , Simone Pereira de Lima , Sirlene Barbosa |
| author_role |
author |
| author2 |
Barral, Bruna Caroline de Oliveira Lima , Simone Pereira de Lima , Sirlene Barbosa |
| author2_role |
author author author |
| dc.contributor.author.fl_str_mv |
Varela, Maria do Carmo Rangel Barral, Bruna Caroline de Oliveira Lima , Simone Pereira de Lima , Sirlene Barbosa |
| dc.subject.por.fl_str_mv |
Estireno Etilbenceno Catalizadores de hierro Hematita Óxido de hierro. Estireno Etilbenzeno Catalisadores de ferro Hematita Óxido de ferro. Styrene Ethylbenzene Iron catalysts Hematite Iron oxide. |
| topic |
Estireno Etilbenceno Catalizadores de hierro Hematita Óxido de hierro. Estireno Etilbenzeno Catalisadores de ferro Hematita Óxido de ferro. Styrene Ethylbenzene Iron catalysts Hematite Iron oxide. |
| description |
Catalytic dehydrogenation of ethylbenzene with steam is the dominant technology for the industrial production of styrene, which is a raw material extensively used in the manufacture of plastics. The commercial catalyst consists of iron oxide doped with potassium and chromium and has a low specific surface area, in addition to being susceptible to deactivation. In order to obtain more efficient catalysts than those available commercially, the effect of the precipitating agent on the performance of iron catalysts, based on hematite, was studied in this work. The samples were prepared by the sol-gel method, using ammonium hydroxide, potassium hydroxide and potassium carbonate as precipitating agents and evaluated in the dehydrogenation of ethylbenzene at 480, 530, 580 and 630 oC. It was observed that the most suitable precipitating agent was potassium carbonate, which produced the most active catalyst, with the highest specific surface area and resistance to reduction. At the temperature of industrial processes (530 oC), this catalyst was four times more active than a commercial sample. |
| publishDate |
2021 |
| dc.date.none.fl_str_mv |
2021-02-14 |
| dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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https://rsdjournal.org/index.php/rsd/article/view/12425 10.33448/rsd-v10i2.12425 |
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https://rsdjournal.org/index.php/rsd/article/view/12425 |
| identifier_str_mv |
10.33448/rsd-v10i2.12425 |
| dc.language.iso.fl_str_mv |
eng por |
| language |
eng por |
| dc.relation.none.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/12425/11240 https://rsdjournal.org/index.php/rsd/article/view/12425/11241 |
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https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
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https://creativecommons.org/licenses/by/4.0 |
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openAccess |
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application/pdf application/pdf |
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Research, Society and Development |
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Research, Society and Development |
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Research, Society and Development; Vol. 10 No. 2; e25810212425 Research, Society and Development; Vol. 10 Núm. 2; e25810212425 Research, Society and Development; v. 10 n. 2; e25810212425 2525-3409 reponame:Research, Society and Development instname:Universidade Federal de Itajubá (UNIFEI) instacron:UNIFEI |
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Research, Society and Development |
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Research, Society and Development - Universidade Federal de Itajubá (UNIFEI) |
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rsd.articles@gmail.com |
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