Selective hydrogenation of citral by noble metals supported on carbon xerogels: Catalytic performance and stability
[Display omitted] •Pt, Ru and Ir-catalysts were developed by impregnation of a microporous carbon xerogels.•Sintering is favoured after H2 pre-treatments regarding He pre-treatments, mainly for Ru-catalysts.•Ir-catalysts present a low activity but a high selectivity to unsaturated alcohols.•Pt-catal...
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| Veröffentlicht in: | Applied catalysis. A, General General, 2016-02, Vol.512, p.63-73 |
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| container_title | Applied catalysis. A, General |
| container_volume | 512 |
| creator | Bailón-García, Esther Carrasco-Marín, Francisco Pérez-Cadenas, Agustín F. Maldonado-Hódar, Francisco J. |
| description | [Display omitted]
•Pt, Ru and Ir-catalysts were developed by impregnation of a microporous carbon xerogels.•Sintering is favoured after H2 pre-treatments regarding He pre-treatments, mainly for Ru-catalysts.•Ir-catalysts present a low activity but a high selectivity to unsaturated alcohols.•Pt-catalysts present the best combination of activity and selectivity, but a deeper deactivation by CO -poisoning.
A series of monometallic Pt, Ir and Ru-catalysts deposited on carbon xerogel microspheres was prepared, exhaustively characterized and used in the selective hydrogenation of citral. A similar metal particle size is obtained in all cases after He-pretreatment, allowing the comparison between metals; the catalytic activity increases in the sense Ir |
| doi_str_mv | 10.1016/j.apcata.2015.12.017 |
| format | Article |
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•Pt, Ru and Ir-catalysts were developed by impregnation of a microporous carbon xerogels.•Sintering is favoured after H2 pre-treatments regarding He pre-treatments, mainly for Ru-catalysts.•Ir-catalysts present a low activity but a high selectivity to unsaturated alcohols.•Pt-catalysts present the best combination of activity and selectivity, but a deeper deactivation by CO -poisoning.
A series of monometallic Pt, Ir and Ru-catalysts deposited on carbon xerogel microspheres was prepared, exhaustively characterized and used in the selective hydrogenation of citral. A similar metal particle size is obtained in all cases after He-pretreatment, allowing the comparison between metals; the catalytic activity increases in the sense Ir<Ru<Pt. Sintering is favoured when catalysts are pretreated in H2-flow leading to an important loss of activity, especially for Ru-catalysts. Pt and Ir-catalysts are more selective than Ru-catalysts, reaching selectivity values to unsaturated alcohols of around 80%. Thus, in terms of yields to these valuable products Pt-catalysts seem to be the most appropriate active phase. Nevertheless, reutilization experiments showed that Ir-catalyst maintained a good performance while a severe deactivation is observed for Pt-catalysts. This fact is discussed on the basis of the different nature of the deposits formed during reaction.</description><identifier>ISSN: 0926-860X</identifier><identifier>EISSN: 1873-3875</identifier><identifier>DOI: 10.1016/j.apcata.2015.12.017</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Active phase selection ; Carbon ; Catalysis ; Catalyst deactivation ; Catalysts ; Citral ; Deposition ; Hydrogenation ; Platinum ; Selective hydrogenation ; Xerogels</subject><ispartof>Applied catalysis. A, General, 2016-02, Vol.512, p.63-73</ispartof><rights>2015 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c376t-c8958eecb70d38d387684e1cdd502a93ced4b46e9333973f7a396e991ea1dc693</citedby><cites>FETCH-LOGICAL-c376t-c8958eecb70d38d387684e1cdd502a93ced4b46e9333973f7a396e991ea1dc693</cites><orcidid>0000-0002-2468-8407</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0926860X1530291X$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65534</link.rule.ids></links><search><creatorcontrib>Bailón-García, Esther</creatorcontrib><creatorcontrib>Carrasco-Marín, Francisco</creatorcontrib><creatorcontrib>Pérez-Cadenas, Agustín F.</creatorcontrib><creatorcontrib>Maldonado-Hódar, Francisco J.</creatorcontrib><title>Selective hydrogenation of citral by noble metals supported on carbon xerogels: Catalytic performance and stability</title><title>Applied catalysis. A, General</title><description>[Display omitted]
•Pt, Ru and Ir-catalysts were developed by impregnation of a microporous carbon xerogels.•Sintering is favoured after H2 pre-treatments regarding He pre-treatments, mainly for Ru-catalysts.•Ir-catalysts present a low activity but a high selectivity to unsaturated alcohols.•Pt-catalysts present the best combination of activity and selectivity, but a deeper deactivation by CO -poisoning.
A series of monometallic Pt, Ir and Ru-catalysts deposited on carbon xerogel microspheres was prepared, exhaustively characterized and used in the selective hydrogenation of citral. A similar metal particle size is obtained in all cases after He-pretreatment, allowing the comparison between metals; the catalytic activity increases in the sense Ir<Ru<Pt. Sintering is favoured when catalysts are pretreated in H2-flow leading to an important loss of activity, especially for Ru-catalysts. Pt and Ir-catalysts are more selective than Ru-catalysts, reaching selectivity values to unsaturated alcohols of around 80%. Thus, in terms of yields to these valuable products Pt-catalysts seem to be the most appropriate active phase. Nevertheless, reutilization experiments showed that Ir-catalyst maintained a good performance while a severe deactivation is observed for Pt-catalysts. This fact is discussed on the basis of the different nature of the deposits formed during reaction.</description><subject>Active phase selection</subject><subject>Carbon</subject><subject>Catalysis</subject><subject>Catalyst deactivation</subject><subject>Catalysts</subject><subject>Citral</subject><subject>Deposition</subject><subject>Hydrogenation</subject><subject>Platinum</subject><subject>Selective hydrogenation</subject><subject>Xerogels</subject><issn>0926-860X</issn><issn>1873-3875</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLxDAUhYMoOD7-gYss3bQmTds0LgQZfMGACxXchTS51QyZpiYZsf_eDONauHC5cM7hng-hC0pKSmh7tS7VpFVSZUVoU9KqJJQfoAXtOCtYx5tDtCCiaouuJe_H6CTGNSGkqkWzQPEFHOhkvwF_zib4DxhVsn7EfsDapqAc7mc8-t4B3kBSLuK4nSYfEhicZVqFPq8f2FldvMbL_Iebk9V4gjD4sFGjBqxGg2NSvXU2zWfoaMhBcP63T9Hb_d3r8rFYPT88LW9XhWa8TYXuRNMB6J4Tw7o8vO1qoNqYhlRKMA2m7usWBGNMcDZwxUS-BAVFjW4FO0WX-9wp-K8txCQ3NmpwTo3gt1FSLlhV14R0WVrvpTr4GAMMcgp2o8IsKZE7xnIt94zljrGklcyMs-1mb8vV4dtCkFFbyIWNDZmqNN7-H_ALmeuJqQ</recordid><startdate>20160225</startdate><enddate>20160225</enddate><creator>Bailón-García, Esther</creator><creator>Carrasco-Marín, Francisco</creator><creator>Pérez-Cadenas, Agustín F.</creator><creator>Maldonado-Hódar, Francisco J.</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-2468-8407</orcidid></search><sort><creationdate>20160225</creationdate><title>Selective hydrogenation of citral by noble metals supported on carbon xerogels: Catalytic performance and stability</title><author>Bailón-García, Esther ; Carrasco-Marín, Francisco ; Pérez-Cadenas, Agustín F. ; Maldonado-Hódar, Francisco J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c376t-c8958eecb70d38d387684e1cdd502a93ced4b46e9333973f7a396e991ea1dc693</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Active phase selection</topic><topic>Carbon</topic><topic>Catalysis</topic><topic>Catalyst deactivation</topic><topic>Catalysts</topic><topic>Citral</topic><topic>Deposition</topic><topic>Hydrogenation</topic><topic>Platinum</topic><topic>Selective hydrogenation</topic><topic>Xerogels</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bailón-García, Esther</creatorcontrib><creatorcontrib>Carrasco-Marín, Francisco</creatorcontrib><creatorcontrib>Pérez-Cadenas, Agustín F.</creatorcontrib><creatorcontrib>Maldonado-Hódar, Francisco J.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied catalysis. A, General</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bailón-García, Esther</au><au>Carrasco-Marín, Francisco</au><au>Pérez-Cadenas, Agustín F.</au><au>Maldonado-Hódar, Francisco J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Selective hydrogenation of citral by noble metals supported on carbon xerogels: Catalytic performance and stability</atitle><jtitle>Applied catalysis. A, General</jtitle><date>2016-02-25</date><risdate>2016</risdate><volume>512</volume><spage>63</spage><epage>73</epage><pages>63-73</pages><issn>0926-860X</issn><eissn>1873-3875</eissn><abstract>[Display omitted]
•Pt, Ru and Ir-catalysts were developed by impregnation of a microporous carbon xerogels.•Sintering is favoured after H2 pre-treatments regarding He pre-treatments, mainly for Ru-catalysts.•Ir-catalysts present a low activity but a high selectivity to unsaturated alcohols.•Pt-catalysts present the best combination of activity and selectivity, but a deeper deactivation by CO -poisoning.
A series of monometallic Pt, Ir and Ru-catalysts deposited on carbon xerogel microspheres was prepared, exhaustively characterized and used in the selective hydrogenation of citral. A similar metal particle size is obtained in all cases after He-pretreatment, allowing the comparison between metals; the catalytic activity increases in the sense Ir<Ru<Pt. Sintering is favoured when catalysts are pretreated in H2-flow leading to an important loss of activity, especially for Ru-catalysts. Pt and Ir-catalysts are more selective than Ru-catalysts, reaching selectivity values to unsaturated alcohols of around 80%. Thus, in terms of yields to these valuable products Pt-catalysts seem to be the most appropriate active phase. Nevertheless, reutilization experiments showed that Ir-catalyst maintained a good performance while a severe deactivation is observed for Pt-catalysts. This fact is discussed on the basis of the different nature of the deposits formed during reaction.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.apcata.2015.12.017</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-2468-8407</orcidid></addata></record> |
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| ispartof | Applied catalysis. A, General, 2016-02, Vol.512, p.63-73 |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Active phase selection Carbon Catalysis Catalyst deactivation Catalysts Citral Deposition Hydrogenation Platinum Selective hydrogenation Xerogels |
| title | Selective hydrogenation of citral by noble metals supported on carbon xerogels: Catalytic performance and stability |
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