Effects of crystal size and Si/Al ratio on the surface properties of H-ZSM-5 zeolites
Highly crystalline H-ZSM-5 zeolite samples with crystal sizes from 0.5 to 5 μm and Si/Al ratios ranging from 20 to 70 have been prepared and characterized by IR spectroscopy, SEM and XRD techniques. The surface properties of these materials have been compared with those of conventional small crystal...
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| Veröffentlicht in: | Applied catalysis. A, General General, 2006-06, Vol.306 (/), p.78-84 |
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| container_title | Applied catalysis. A, General |
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| creator | Armaroli, T. Simon, L.J. Digne, M. Montanari, T. Bevilacqua, M. Valtchev, V. Patarin, J. Busca, G. |
| description | Highly crystalline H-ZSM-5 zeolite samples with crystal sizes from 0.5 to 5
μm and Si/Al ratios ranging from 20 to 70 have been prepared and characterized by IR spectroscopy, SEM and XRD techniques. The surface properties of these materials have been compared with those of conventional small crystal size materials by using FT-IR spectroscopy of the surface hydroxyl groups and of adsorbed carbon monoxide. The external surface has been investigated using pivalonitrile (2,2-dimethyl-propionitrile) as an adsorption probe. Data show that the basic structure of the zeolite active sites do not depend significantly on the crystal size. Brønsted acid sites of high acid strength are constituted by bridging OH groups located inside the zeolite channels, while Lewis acid sites and weakly acidic silanol groups are found on the external surface in all cases. |
| doi_str_mv | 10.1016/j.apcata.2006.03.030 |
| format | Article |
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μm and Si/Al ratios ranging from 20 to 70 have been prepared and characterized by IR spectroscopy, SEM and XRD techniques. The surface properties of these materials have been compared with those of conventional small crystal size materials by using FT-IR spectroscopy of the surface hydroxyl groups and of adsorbed carbon monoxide. The external surface has been investigated using pivalonitrile (2,2-dimethyl-propionitrile) as an adsorption probe. Data show that the basic structure of the zeolite active sites do not depend significantly on the crystal size. Brønsted acid sites of high acid strength are constituted by bridging OH groups located inside the zeolite channels, while Lewis acid sites and weakly acidic silanol groups are found on the external surface in all cases.</description><identifier>ISSN: 0926-860X</identifier><identifier>EISSN: 1873-3875</identifier><identifier>DOI: 10.1016/j.apcata.2006.03.030</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Brønsted acidity ; Catalysis ; Chemical Sciences ; Chemistry ; CO adsorption ; Crystal size ; Exact sciences and technology ; External surface ; General and physical chemistry ; Ion-exchange ; IR spectroscopy ; Lewis acidity ; Material chemistry ; Morphology ; Nitrile adsorption ; Surface physical chemistry ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; Zeolites: preparations and properties ; ZSM5 zeolite</subject><ispartof>Applied catalysis. A, General, 2006-06, Vol.306 (/), p.78-84</ispartof><rights>2006 Elsevier B.V.</rights><rights>2006 INIST-CNRS</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c436t-5b5c55bfcf581fd876b3d20cbac2d6861a5b30daf38cfc4df716474750fe75033</citedby><cites>FETCH-LOGICAL-c436t-5b5c55bfcf581fd876b3d20cbac2d6861a5b30daf38cfc4df716474750fe75033</cites><orcidid>0000-0002-2341-6397</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0926860X06002122$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,776,780,881,3536,27903,27904,65309</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17787081$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-00267270$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Armaroli, T.</creatorcontrib><creatorcontrib>Simon, L.J.</creatorcontrib><creatorcontrib>Digne, M.</creatorcontrib><creatorcontrib>Montanari, T.</creatorcontrib><creatorcontrib>Bevilacqua, M.</creatorcontrib><creatorcontrib>Valtchev, V.</creatorcontrib><creatorcontrib>Patarin, J.</creatorcontrib><creatorcontrib>Busca, G.</creatorcontrib><title>Effects of crystal size and Si/Al ratio on the surface properties of H-ZSM-5 zeolites</title><title>Applied catalysis. A, General</title><description>Highly crystalline H-ZSM-5 zeolite samples with crystal sizes from 0.5 to 5
μm and Si/Al ratios ranging from 20 to 70 have been prepared and characterized by IR spectroscopy, SEM and XRD techniques. The surface properties of these materials have been compared with those of conventional small crystal size materials by using FT-IR spectroscopy of the surface hydroxyl groups and of adsorbed carbon monoxide. The external surface has been investigated using pivalonitrile (2,2-dimethyl-propionitrile) as an adsorption probe. Data show that the basic structure of the zeolite active sites do not depend significantly on the crystal size. Brønsted acid sites of high acid strength are constituted by bridging OH groups located inside the zeolite channels, while Lewis acid sites and weakly acidic silanol groups are found on the external surface in all cases.</description><subject>Brønsted acidity</subject><subject>Catalysis</subject><subject>Chemical Sciences</subject><subject>Chemistry</subject><subject>CO adsorption</subject><subject>Crystal size</subject><subject>Exact sciences and technology</subject><subject>External surface</subject><subject>General and physical chemistry</subject><subject>Ion-exchange</subject><subject>IR spectroscopy</subject><subject>Lewis acidity</subject><subject>Material chemistry</subject><subject>Morphology</subject><subject>Nitrile adsorption</subject><subject>Surface physical chemistry</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>Zeolites: preparations and properties</subject><subject>ZSM5 zeolite</subject><issn>0926-860X</issn><issn>1873-3875</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNp9kE9LAzEQxYMoWKvfwEMuHjxsnWw2f7wIRaoVKh5qQbyE2WxCU9bukqwF_fRuXdGbMMzA8H4zvEfIOYMJAyavNhNsLXY4yQHkBHhfcEBGTCueca3EIRnBdS4zLeHlmJyktAGAvLgWI7Kaee9sl2jjqY0fqcOapvDpKG4rugxX05pG7EJDmy3t1o6m9-jROtrGpnWxC-6bnGevy8dM0E_X1KFz6ZQceayTO_uZY7K6mz3fzrPF0_3D7XSR2YLLLhOlsEKU3nqhma-0kiWvcrAl2rySWjIUJYcKPdfW26LyislCFUqAd33jfEwuh7trrE0bwxvGD9NgMPPpwux3vU2pcgU71muLQWtjk1J0_hdgYPYxmo0ZYjT7GA3wvqDHLgasxWSx9hG3NqQ_VimtQO_P3ww61_vdBRdNssFtratC7AM2VRP-f_QF4jCJBg</recordid><startdate>20060607</startdate><enddate>20060607</enddate><creator>Armaroli, T.</creator><creator>Simon, L.J.</creator><creator>Digne, M.</creator><creator>Montanari, T.</creator><creator>Bevilacqua, M.</creator><creator>Valtchev, V.</creator><creator>Patarin, J.</creator><creator>Busca, G.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0002-2341-6397</orcidid></search><sort><creationdate>20060607</creationdate><title>Effects of crystal size and Si/Al ratio on the surface properties of H-ZSM-5 zeolites</title><author>Armaroli, T. ; Simon, L.J. ; Digne, M. ; Montanari, T. ; Bevilacqua, M. ; Valtchev, V. ; Patarin, J. ; Busca, G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c436t-5b5c55bfcf581fd876b3d20cbac2d6861a5b30daf38cfc4df716474750fe75033</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Brønsted acidity</topic><topic>Catalysis</topic><topic>Chemical Sciences</topic><topic>Chemistry</topic><topic>CO adsorption</topic><topic>Crystal size</topic><topic>Exact sciences and technology</topic><topic>External surface</topic><topic>General and physical chemistry</topic><topic>Ion-exchange</topic><topic>IR spectroscopy</topic><topic>Lewis acidity</topic><topic>Material chemistry</topic><topic>Morphology</topic><topic>Nitrile adsorption</topic><topic>Surface physical chemistry</topic><topic>Theory of reactions, general kinetics. 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μm and Si/Al ratios ranging from 20 to 70 have been prepared and characterized by IR spectroscopy, SEM and XRD techniques. The surface properties of these materials have been compared with those of conventional small crystal size materials by using FT-IR spectroscopy of the surface hydroxyl groups and of adsorbed carbon monoxide. The external surface has been investigated using pivalonitrile (2,2-dimethyl-propionitrile) as an adsorption probe. Data show that the basic structure of the zeolite active sites do not depend significantly on the crystal size. Brønsted acid sites of high acid strength are constituted by bridging OH groups located inside the zeolite channels, while Lewis acid sites and weakly acidic silanol groups are found on the external surface in all cases.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.apcata.2006.03.030</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0002-2341-6397</orcidid></addata></record> |
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| ispartof | Applied catalysis. A, General, 2006-06, Vol.306 (/), p.78-84 |
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| source | Elsevier ScienceDirect Journals |
| subjects | Brønsted acidity Catalysis Chemical Sciences Chemistry CO adsorption Crystal size Exact sciences and technology External surface General and physical chemistry Ion-exchange IR spectroscopy Lewis acidity Material chemistry Morphology Nitrile adsorption Surface physical chemistry Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Zeolites: preparations and properties ZSM5 zeolite |
| title | Effects of crystal size and Si/Al ratio on the surface properties of H-ZSM-5 zeolites |
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