Evidences of the in situ generation of highly active Lewis acid species on Zr-SBA-15
The dramatic increase in activity of reused/treated Zr-SBA-15 in the alkylation of aromatics with benzyl chloride points to the formation of novel highly acidic Lewis Cl x Zr–O–Si species on the catalyst surface. Such materials provided quantitative conversions of starting material in less than 1 h...
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| Veröffentlicht in: | Applied catalysis. A, General General, 2009-12, Vol.371 (1), p.85-91 |
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| container_title | Applied catalysis. A, General |
| container_volume | 371 |
| creator | Gracia, Maria D. Balu, Alina M. Campelo, Juan M. Luque, Rafael Marinas, Jose M. Romero, Antonio A. |
| description | The dramatic increase in activity of reused/treated Zr-SBA-15 in the alkylation of aromatics with benzyl chloride points to the formation of novel highly acidic Lewis Cl
x
Zr–O–Si species on the catalyst surface. Such materials provided quantitative conversions of starting material in less than 1
h compared to more than 12
h needed for the parent Zr-SBA-15.
Zr-SBA-15 materials were synthesized and the activity of the catalysts was investigated in the alkylation of aromatics with benzyl chloride. While Zr-SBA-15 materials needed more than 12
h of reaction to achieve quantitative conversion, an unusually high catalytic activity was observed for reused materials that provided quantitative conversions of starting material in less than 1
h. This dramatic increase in activity observed for reused and/or treated Zr-SBA-15 in the alkylation of aromatics with benzyl chloride points to the formation of novel highly acidic Lewis Cl
x
Zr–O–Si species on the catalyst surface. |
| doi_str_mv | 10.1016/j.apcata.2009.09.033 |
| format | Article |
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x
Zr–O–Si species on the catalyst surface. Such materials provided quantitative conversions of starting material in less than 1
h compared to more than 12
h needed for the parent Zr-SBA-15.
Zr-SBA-15 materials were synthesized and the activity of the catalysts was investigated in the alkylation of aromatics with benzyl chloride. While Zr-SBA-15 materials needed more than 12
h of reaction to achieve quantitative conversion, an unusually high catalytic activity was observed for reused materials that provided quantitative conversions of starting material in less than 1
h. This dramatic increase in activity observed for reused and/or treated Zr-SBA-15 in the alkylation of aromatics with benzyl chloride points to the formation of novel highly acidic Lewis Cl
x
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x
Zr–O–Si species on the catalyst surface. Such materials provided quantitative conversions of starting material in less than 1
h compared to more than 12
h needed for the parent Zr-SBA-15.
Zr-SBA-15 materials were synthesized and the activity of the catalysts was investigated in the alkylation of aromatics with benzyl chloride. While Zr-SBA-15 materials needed more than 12
h of reaction to achieve quantitative conversion, an unusually high catalytic activity was observed for reused materials that provided quantitative conversions of starting material in less than 1
h. This dramatic increase in activity observed for reused and/or treated Zr-SBA-15 in the alkylation of aromatics with benzyl chloride points to the formation of novel highly acidic Lewis Cl
x
Zr–O–Si species on the catalyst surface.</description><subject>Alkylation</subject><subject>Alkylation of aromatics</subject><subject>Catalysis</subject><subject>Catalysts</subject><subject>Chemistry</subject><subject>Chlorides</subject><subject>Colloidal state and disperse state</subject><subject>Conversion</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>In situ generation of acid sites</subject><subject>Lewis acid</subject><subject>Lewis acidity</subject><subject>Porous materials</subject><subject>Surface chemistry</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>Zirconium</subject><subject>Zr-SBA-15</subject><issn>0926-860X</issn><issn>1873-3875</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNp9kMFqGzEQhkVJIY6TN8hBl7andUea3dXqUkhN0hYMOTSFkouQpdlYZrPrSmsHv320OPQYMSAGff-M-Bi7FrAQIOqv24XdOTvahQTQi6kQP7CZaBQW2KjqjM1Ay7poavh7zi5S2gKALHU1Yw-3h-Cpd5T40PJxQzz0PIVxz5-op2jHMPTTyyY8bbojt24MB-IregkpN8HztCMXpnTPH2Px-_tNIapL9rG1XaKrt3vO_tzdPix_Fqv7H7-WN6vCodTj9B3Z-LpG70sHTgIJtFavCaVEJZXWsPagsRK2pBbXtqm1l23TIgCtRYtz9uU0dxeHf3tKo3kOyVHX2Z6GfTKqQlVKrVQmP79LYgWVBlVmsDyBLg4pRWrNLoZnG49GgJlkm605yTaTbDMVYo59eptvk7NdG23vQvqflfnUoqwy9-3EUdZyCBRNyvayfh8iudH4Iby_6BWoi5UD</recordid><startdate>20091215</startdate><enddate>20091215</enddate><creator>Gracia, Maria D.</creator><creator>Balu, Alina M.</creator><creator>Campelo, Juan M.</creator><creator>Luque, Rafael</creator><creator>Marinas, Jose M.</creator><creator>Romero, Antonio A.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20091215</creationdate><title>Evidences of the in situ generation of highly active Lewis acid species on Zr-SBA-15</title><author>Gracia, Maria D. ; Balu, Alina M. ; Campelo, Juan M. ; Luque, Rafael ; Marinas, Jose M. ; Romero, Antonio A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c329t-86028d663dd4c0c20e13aa9be3223727990bd09351a4ef3ba869d2f8f300eb1f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Alkylation</topic><topic>Alkylation of aromatics</topic><topic>Catalysis</topic><topic>Catalysts</topic><topic>Chemistry</topic><topic>Chlorides</topic><topic>Colloidal state and disperse state</topic><topic>Conversion</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>In situ generation of acid sites</topic><topic>Lewis acid</topic><topic>Lewis acidity</topic><topic>Porous materials</topic><topic>Surface chemistry</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>Zirconium</topic><topic>Zr-SBA-15</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gracia, Maria D.</creatorcontrib><creatorcontrib>Balu, Alina M.</creatorcontrib><creatorcontrib>Campelo, Juan M.</creatorcontrib><creatorcontrib>Luque, Rafael</creatorcontrib><creatorcontrib>Marinas, Jose M.</creatorcontrib><creatorcontrib>Romero, Antonio A.</creatorcontrib><collection>Pascal-Francis</collection><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>Gracia, Maria D.</au><au>Balu, Alina M.</au><au>Campelo, Juan M.</au><au>Luque, Rafael</au><au>Marinas, Jose M.</au><au>Romero, Antonio A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evidences of the in situ generation of highly active Lewis acid species on Zr-SBA-15</atitle><jtitle>Applied catalysis. A, General</jtitle><date>2009-12-15</date><risdate>2009</risdate><volume>371</volume><issue>1</issue><spage>85</spage><epage>91</epage><pages>85-91</pages><issn>0926-860X</issn><eissn>1873-3875</eissn><abstract>The dramatic increase in activity of reused/treated Zr-SBA-15 in the alkylation of aromatics with benzyl chloride points to the formation of novel highly acidic Lewis Cl
x
Zr–O–Si species on the catalyst surface. Such materials provided quantitative conversions of starting material in less than 1
h compared to more than 12
h needed for the parent Zr-SBA-15.
Zr-SBA-15 materials were synthesized and the activity of the catalysts was investigated in the alkylation of aromatics with benzyl chloride. While Zr-SBA-15 materials needed more than 12
h of reaction to achieve quantitative conversion, an unusually high catalytic activity was observed for reused materials that provided quantitative conversions of starting material in less than 1
h. This dramatic increase in activity observed for reused and/or treated Zr-SBA-15 in the alkylation of aromatics with benzyl chloride points to the formation of novel highly acidic Lewis Cl
x
Zr–O–Si species on the catalyst surface.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.apcata.2009.09.033</doi><tpages>7</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0926-860X |
| ispartof | Applied catalysis. A, General, 2009-12, Vol.371 (1), p.85-91 |
| issn | 0926-860X 1873-3875 |
| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Alkylation Alkylation of aromatics Catalysis Catalysts Chemistry Chlorides Colloidal state and disperse state Conversion Exact sciences and technology General and physical chemistry In situ generation of acid sites Lewis acid Lewis acidity Porous materials Surface chemistry Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Zirconium Zr-SBA-15 |
| title | Evidences of the in situ generation of highly active Lewis acid species on Zr-SBA-15 |
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