The Mechanism of Zeolite Y Destruction by Steam in the Presence of Vanadium
The mechanism of zeolite Y destruction by steam in the presence of vanadium is described. Electron spin resonance, UV–VIS diffuse reflectance, and sorption measurements are used to understand vanadium dynamics on the zeolite. Vanadium deposited on the external surface of the zeolite migrates into th...
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| Veröffentlicht in: | Journal of Catalysis 1997-05, Vol.168 (1), p.1-15 |
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| container_title | Journal of Catalysis |
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| creator | Trujillo, Carlos A. Uribe, Uriel Navarro Knops-Gerrits, Peter-Paul Oviedo A, Luis Alfredo Jacobs, Pierre A. |
| description | The mechanism of zeolite Y destruction by steam in the presence of vanadium is described. Electron spin resonance, UV–VIS diffuse reflectance, and sorption measurements are used to understand vanadium dynamics on the zeolite. Vanadium deposited on the external surface of the zeolite migrates into the channels by being heated in oxidizing atmosphere; although water helps vanadium reach the acid sites, it is not required. Vanadium is stabilized as VO2+cation near the acid sites. The strongest acid sites can stabilize V as VO2+cations, but experimental results show that VIVdoes not play any role in zeolite destruction. Extraframework aluminum competes with the zeolite for vanadium and delays its migration to the acid sites. In the presence of water vanadic acid is formed inside the zeolite according to the reaction VO2+–Y+2H2O ⇌H+– Y+2H3VO4. Since vanadic acid is a strong acid, it can destroy the zeolite by hydrolysis of the SiO2/Al2O3framework; in this way, vanadium can act as a catalyst for zeolite destruction. Synergistic action between sodium and vanadium is explained. A detailed mechanism for zeolite dealumination by steam is proposed. |
| doi_str_mv | 10.1006/jcat.1997.1550 |
| format | Article |
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Electron spin resonance, UV–VIS diffuse reflectance, and sorption measurements are used to understand vanadium dynamics on the zeolite. Vanadium deposited on the external surface of the zeolite migrates into the channels by being heated in oxidizing atmosphere; although water helps vanadium reach the acid sites, it is not required. Vanadium is stabilized as VO2+cation near the acid sites. The strongest acid sites can stabilize V as VO2+cations, but experimental results show that VIVdoes not play any role in zeolite destruction. Extraframework aluminum competes with the zeolite for vanadium and delays its migration to the acid sites. In the presence of water vanadic acid is formed inside the zeolite according to the reaction VO2+–Y+2H2O ⇌H+– Y+2H3VO4. Since vanadic acid is a strong acid, it can destroy the zeolite by hydrolysis of the SiO2/Al2O3framework; in this way, vanadium can act as a catalyst for zeolite destruction. Synergistic action between sodium and vanadium is explained. A detailed mechanism for zeolite dealumination by steam is proposed.</description><identifier>ISSN: 0021-9517</identifier><identifier>EISSN: 1090-2694</identifier><identifier>DOI: 10.1006/jcat.1997.1550</identifier><identifier>CODEN: JCTLA5</identifier><language>eng</language><publisher>Amsterdam: Elsevier Inc</publisher><subject>02 PETROLEUM ; Catalysis ; CATALYSTS ; Catalysts: preparations and properties ; CATALYTIC CRACKING ; Chemistry ; DEACTIVATION ; ELECTRON SPIN RESONANCE ; Exact sciences and technology ; General and physical chemistry ; MATERIALS SCIENCE ; PETROLEUM ; STEAM ; SURFACE PROPERTIES ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; VANADIUM ; ZEOLITES</subject><ispartof>Journal of Catalysis, 1997-05, Vol.168 (1), p.1-15</ispartof><rights>1997 Academic Press</rights><rights>1997 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c377t-a4d620f84f6f86568b9801ec8bb17d8dcbc53254391132a3d20de2434c2a218f3</citedby><cites>FETCH-LOGICAL-c377t-a4d620f84f6f86568b9801ec8bb17d8dcbc53254391132a3d20de2434c2a218f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0021951797915505$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,881,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2710346$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/543381$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Trujillo, Carlos A.</creatorcontrib><creatorcontrib>Uribe, Uriel Navarro</creatorcontrib><creatorcontrib>Knops-Gerrits, Peter-Paul</creatorcontrib><creatorcontrib>Oviedo A, Luis Alfredo</creatorcontrib><creatorcontrib>Jacobs, Pierre A.</creatorcontrib><title>The Mechanism of Zeolite Y Destruction by Steam in the Presence of Vanadium</title><title>Journal of Catalysis</title><description>The mechanism of zeolite Y destruction by steam in the presence of vanadium is described. Electron spin resonance, UV–VIS diffuse reflectance, and sorption measurements are used to understand vanadium dynamics on the zeolite. Vanadium deposited on the external surface of the zeolite migrates into the channels by being heated in oxidizing atmosphere; although water helps vanadium reach the acid sites, it is not required. Vanadium is stabilized as VO2+cation near the acid sites. The strongest acid sites can stabilize V as VO2+cations, but experimental results show that VIVdoes not play any role in zeolite destruction. Extraframework aluminum competes with the zeolite for vanadium and delays its migration to the acid sites. In the presence of water vanadic acid is formed inside the zeolite according to the reaction VO2+–Y+2H2O ⇌H+– Y+2H3VO4. Since vanadic acid is a strong acid, it can destroy the zeolite by hydrolysis of the SiO2/Al2O3framework; in this way, vanadium can act as a catalyst for zeolite destruction. Synergistic action between sodium and vanadium is explained. A detailed mechanism for zeolite dealumination by steam is proposed.</description><subject>02 PETROLEUM</subject><subject>Catalysis</subject><subject>CATALYSTS</subject><subject>Catalysts: preparations and properties</subject><subject>CATALYTIC CRACKING</subject><subject>Chemistry</subject><subject>DEACTIVATION</subject><subject>ELECTRON SPIN RESONANCE</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>MATERIALS SCIENCE</subject><subject>PETROLEUM</subject><subject>STEAM</subject><subject>SURFACE PROPERTIES</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>VANADIUM</subject><subject>ZEOLITES</subject><issn>0021-9517</issn><issn>1090-2694</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><recordid>eNp1kElLAzEARoMoWKtXzxG8zphllsxR6ooVBaugl5DJQlPaTElSof_ehBFvnnJ5L1_yADjHqMQINVcrKWKJu64tcV2jAzDBqEMFabrqEEwQIrjoatweg5MQVgjhBLEJeFosNXzWcimcDRs4GPilh7WNGn7CGx2i38loBwf7PXyLWmygdTAm5dXroJ3U2fgQTii725yCIyPWQZ_9nlPwfne7mD0U85f7x9n1vJC0bWMhKtUQZFhlGsOaumF9xxDWkvU9bhVTspc1JXVFO4wpEVQRpDSpaCWJIJgZOgUX471DiJYHmV4rl3JwTsvIk0cZTkw5MtIPIXht-NbbjfB7jhHPuXjOxXMunnMl4XIUtiJIsTZeOGnDn0VajGjVJIyNmE4f_Lba5_0cQlmf59Vg_1v4AakkfF4</recordid><startdate>19970501</startdate><enddate>19970501</enddate><creator>Trujillo, Carlos A.</creator><creator>Uribe, Uriel Navarro</creator><creator>Knops-Gerrits, Peter-Paul</creator><creator>Oviedo A, Luis Alfredo</creator><creator>Jacobs, Pierre A.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>19970501</creationdate><title>The Mechanism of Zeolite Y Destruction by Steam in the Presence of Vanadium</title><author>Trujillo, Carlos A. ; Uribe, Uriel Navarro ; Knops-Gerrits, Peter-Paul ; Oviedo A, Luis Alfredo ; Jacobs, Pierre A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c377t-a4d620f84f6f86568b9801ec8bb17d8dcbc53254391132a3d20de2434c2a218f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>02 PETROLEUM</topic><topic>Catalysis</topic><topic>CATALYSTS</topic><topic>Catalysts: preparations and properties</topic><topic>CATALYTIC CRACKING</topic><topic>Chemistry</topic><topic>DEACTIVATION</topic><topic>ELECTRON SPIN RESONANCE</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>MATERIALS SCIENCE</topic><topic>PETROLEUM</topic><topic>STEAM</topic><topic>SURFACE PROPERTIES</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>VANADIUM</topic><topic>ZEOLITES</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Trujillo, Carlos A.</creatorcontrib><creatorcontrib>Uribe, Uriel Navarro</creatorcontrib><creatorcontrib>Knops-Gerrits, Peter-Paul</creatorcontrib><creatorcontrib>Oviedo A, Luis Alfredo</creatorcontrib><creatorcontrib>Jacobs, Pierre A.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Journal of Catalysis</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Trujillo, Carlos A.</au><au>Uribe, Uriel Navarro</au><au>Knops-Gerrits, Peter-Paul</au><au>Oviedo A, Luis Alfredo</au><au>Jacobs, Pierre A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Mechanism of Zeolite Y Destruction by Steam in the Presence of Vanadium</atitle><jtitle>Journal of Catalysis</jtitle><date>1997-05-01</date><risdate>1997</risdate><volume>168</volume><issue>1</issue><spage>1</spage><epage>15</epage><pages>1-15</pages><issn>0021-9517</issn><eissn>1090-2694</eissn><coden>JCTLA5</coden><abstract>The mechanism of zeolite Y destruction by steam in the presence of vanadium is described. Electron spin resonance, UV–VIS diffuse reflectance, and sorption measurements are used to understand vanadium dynamics on the zeolite. Vanadium deposited on the external surface of the zeolite migrates into the channels by being heated in oxidizing atmosphere; although water helps vanadium reach the acid sites, it is not required. Vanadium is stabilized as VO2+cation near the acid sites. The strongest acid sites can stabilize V as VO2+cations, but experimental results show that VIVdoes not play any role in zeolite destruction. Extraframework aluminum competes with the zeolite for vanadium and delays its migration to the acid sites. In the presence of water vanadic acid is formed inside the zeolite according to the reaction VO2+–Y+2H2O ⇌H+– Y+2H3VO4. Since vanadic acid is a strong acid, it can destroy the zeolite by hydrolysis of the SiO2/Al2O3framework; in this way, vanadium can act as a catalyst for zeolite destruction. Synergistic action between sodium and vanadium is explained. A detailed mechanism for zeolite dealumination by steam is proposed.</abstract><cop>Amsterdam</cop><pub>Elsevier Inc</pub><doi>10.1006/jcat.1997.1550</doi><tpages>15</tpages></addata></record> |
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| subjects | 02 PETROLEUM Catalysis CATALYSTS Catalysts: preparations and properties CATALYTIC CRACKING Chemistry DEACTIVATION ELECTRON SPIN RESONANCE Exact sciences and technology General and physical chemistry MATERIALS SCIENCE PETROLEUM STEAM SURFACE PROPERTIES Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry VANADIUM ZEOLITES |
| title | The Mechanism of Zeolite Y Destruction by Steam in the Presence of Vanadium |
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