Thermal Stability of Zirconia as a Catalyst Support: Kinetics and Modelling
The textural changes of two zirconium dioxide powders, one containing only tetragonal crystallites and the other a mixture of monoclinic and tetragonal crystallites, were investigated. The crystallite size increase was followed by means of X-ray diffraction line broadening for powders annealed in a...
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| Veröffentlicht in: | Journal of catalysis 1993-02, Vol.139 (2), p.329-337 |
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| creator | Methivier, A. Pijolat, M. |
| description | The textural changes of two zirconium dioxide powders, one containing only tetragonal crystallites and the other a mixture of monoclinic and tetragonal crystallites, were investigated. The crystallite size increase was followed by means of X-ray diffraction line broadening for powders annealed in a controlled gaseous atmosphere at 600 and 770°C, in order to establish the variations of its experimental rate versus partial pressures of water and oxygen. An accelerating influence of water vapour was observed for both powders. A model, based on a catalytic effect of water vapour, and involving six elementary steps, was proposed in order to calculate theoretical rates within the approximation of the rate-limiting step. The comparison between the experimental and theoretical rate laws attests to the validity of the model and defines the most probable rate-limiting step: tetragonal crystallite growth proceeds at a rate controlled either by adsorption (or desorption) of water molecules or diffusion of hydroxyl groups: monoclinic crystallite growth is controlled by the diffusion of zirconium ions. |
| doi_str_mv | 10.1006/jcat.1993.1028 |
| format | Article |
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The crystallite size increase was followed by means of X-ray diffraction line broadening for powders annealed in a controlled gaseous atmosphere at 600 and 770°C, in order to establish the variations of its experimental rate versus partial pressures of water and oxygen. An accelerating influence of water vapour was observed for both powders. A model, based on a catalytic effect of water vapour, and involving six elementary steps, was proposed in order to calculate theoretical rates within the approximation of the rate-limiting step. The comparison between the experimental and theoretical rate laws attests to the validity of the model and defines the most probable rate-limiting step: tetragonal crystallite growth proceeds at a rate controlled either by adsorption (or desorption) of water molecules or diffusion of hydroxyl groups: monoclinic crystallite growth is controlled by the diffusion of zirconium ions.</description><identifier>ISSN: 0021-9517</identifier><identifier>EISSN: 1090-2694</identifier><identifier>DOI: 10.1006/jcat.1993.1028</identifier><identifier>CODEN: JCTLA5</identifier><language>eng</language><publisher>Amsterdam: Elsevier Inc</publisher><subject>360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies ; ADSORPTION ; ANNEALING ; Catalysis ; CATALYST SUPPORTS ; CATALYSTS ; Catalysts: preparations and properties ; CHALCOGENIDES ; CHARGED PARTICLES ; Chemical and Process Engineering ; CHEMICAL REACTION KINETICS ; Chemistry ; COHERENT SCATTERING ; CRYSTAL GROWTH ; CRYSTAL LATTICES ; CRYSTAL STRUCTURE ; DESORPTION ; DIFFRACTION ; DIFFUSION ; ELEMENTS ; Engineering Sciences ; Exact sciences and technology ; General and physical chemistry ; HEAT TREATMENTS ; HYDROGEN COMPOUNDS ; IONS ; KINETICS ; LINE BROADENING ; MATERIALS SCIENCE ; MONOCLINIC LATTICES ; NONMETALS ; OXIDES ; OXYGEN ; OXYGEN COMPOUNDS ; POWDERS ; REACTION KINETICS ; SCATTERING ; SIZE ; SORPTION ; STABILITY ; TEMPERATURE DEPENDENCE ; TEMPERATURE RANGE ; TEMPERATURE RANGE 0400-1000 K ; TEMPERATURE RANGE 1000-4000 K ; TETRAGONAL LATTICES ; TEXTURE ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; TRANSITION ELEMENT COMPOUNDS ; WATER ; X-RAY DIFFRACTION ; ZIRCONIUM COMPOUNDS ; ZIRCONIUM IONS ; ZIRCONIUM OXIDES</subject><ispartof>Journal of catalysis, 1993-02, Vol.139 (2), p.329-337</ispartof><rights>1993 Academic Press</rights><rights>1993 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-c377t-d82c985e7b4802ebbd9657335892dea501689069a7cba2b20d172db729d2420e3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0021951783710286$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,776,780,881,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=4530316$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://hal-emse.ccsd.cnrs.fr/emse-00610371$$DView record in HAL$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/6239080$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Methivier, A.</creatorcontrib><creatorcontrib>Pijolat, M.</creatorcontrib><title>Thermal Stability of Zirconia as a Catalyst Support: Kinetics and Modelling</title><title>Journal of catalysis</title><description>The textural changes of two zirconium dioxide powders, one containing only tetragonal crystallites and the other a mixture of monoclinic and tetragonal crystallites, were investigated. The crystallite size increase was followed by means of X-ray diffraction line broadening for powders annealed in a controlled gaseous atmosphere at 600 and 770°C, in order to establish the variations of its experimental rate versus partial pressures of water and oxygen. An accelerating influence of water vapour was observed for both powders. A model, based on a catalytic effect of water vapour, and involving six elementary steps, was proposed in order to calculate theoretical rates within the approximation of the rate-limiting step. The comparison between the experimental and theoretical rate laws attests to the validity of the model and defines the most probable rate-limiting step: tetragonal crystallite growth proceeds at a rate controlled either by adsorption (or desorption) of water molecules or diffusion of hydroxyl groups: monoclinic crystallite growth is controlled by the diffusion of zirconium ions.</description><subject>360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies</subject><subject>ADSORPTION</subject><subject>ANNEALING</subject><subject>Catalysis</subject><subject>CATALYST SUPPORTS</subject><subject>CATALYSTS</subject><subject>Catalysts: preparations and properties</subject><subject>CHALCOGENIDES</subject><subject>CHARGED PARTICLES</subject><subject>Chemical and Process Engineering</subject><subject>CHEMICAL REACTION KINETICS</subject><subject>Chemistry</subject><subject>COHERENT SCATTERING</subject><subject>CRYSTAL GROWTH</subject><subject>CRYSTAL LATTICES</subject><subject>CRYSTAL STRUCTURE</subject><subject>DESORPTION</subject><subject>DIFFRACTION</subject><subject>DIFFUSION</subject><subject>ELEMENTS</subject><subject>Engineering Sciences</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>HEAT TREATMENTS</subject><subject>HYDROGEN COMPOUNDS</subject><subject>IONS</subject><subject>KINETICS</subject><subject>LINE BROADENING</subject><subject>MATERIALS SCIENCE</subject><subject>MONOCLINIC LATTICES</subject><subject>NONMETALS</subject><subject>OXIDES</subject><subject>OXYGEN</subject><subject>OXYGEN COMPOUNDS</subject><subject>POWDERS</subject><subject>REACTION KINETICS</subject><subject>SCATTERING</subject><subject>SIZE</subject><subject>SORPTION</subject><subject>STABILITY</subject><subject>TEMPERATURE DEPENDENCE</subject><subject>TEMPERATURE RANGE</subject><subject>TEMPERATURE RANGE 0400-1000 K</subject><subject>TEMPERATURE RANGE 1000-4000 K</subject><subject>TETRAGONAL LATTICES</subject><subject>TEXTURE</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>TRANSITION ELEMENT COMPOUNDS</subject><subject>WATER</subject><subject>X-RAY DIFFRACTION</subject><subject>ZIRCONIUM COMPOUNDS</subject><subject>ZIRCONIUM IONS</subject><subject>ZIRCONIUM OXIDES</subject><issn>0021-9517</issn><issn>1090-2694</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><recordid>eNp1kMFrFDEUh4MouNZePQfxJMz6kuxMEm9lsa10xUPbi5fwJnnrpszOLEks7H9vhpHePIVHvt97Pz7GPghYC4Duy5PHshbWqjpK84qtBFhoZGc3r9kKQIrGtkK_Ze9yfgIQom3Nit09HCgdceD3Bfs4xHLm057_islPY0SOmSPfYsHhnAu__3M6Tal85XdxpBJ9_RwD_zEFGoY4_n7P3uxxyHT5771gj9ffHra3ze7nzfft1a7xSuvSBCO9NS3pfmNAUt8H27VaqdZYGQhbEJ2x0FnUvkfZSwhCy9BraYPcSCB1wT4ue6dcoss-FvKH2nckX1wnlQUDFfq8QAcc3CnFI6azmzC626udo2MmV50JUFo8iwqvF9inKedE-5eEADfLdbNcN8t1s9wa-LQETpg9DvuEo4_5JbVpFSjRVcwsGFUdz5HS3JZGTyGmuWyY4v8u_AXB94r4</recordid><startdate>19930201</startdate><enddate>19930201</enddate><creator>Methivier, A.</creator><creator>Pijolat, M.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>1XC</scope><scope>OTOTI</scope></search><sort><creationdate>19930201</creationdate><title>Thermal Stability of Zirconia as a Catalyst Support: Kinetics and Modelling</title><author>Methivier, A. ; Pijolat, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c377t-d82c985e7b4802ebbd9657335892dea501689069a7cba2b20d172db729d2420e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><topic>360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies</topic><topic>ADSORPTION</topic><topic>ANNEALING</topic><topic>Catalysis</topic><topic>CATALYST SUPPORTS</topic><topic>CATALYSTS</topic><topic>Catalysts: preparations and properties</topic><topic>CHALCOGENIDES</topic><topic>CHARGED PARTICLES</topic><topic>Chemical and Process Engineering</topic><topic>CHEMICAL REACTION KINETICS</topic><topic>Chemistry</topic><topic>COHERENT SCATTERING</topic><topic>CRYSTAL GROWTH</topic><topic>CRYSTAL LATTICES</topic><topic>CRYSTAL STRUCTURE</topic><topic>DESORPTION</topic><topic>DIFFRACTION</topic><topic>DIFFUSION</topic><topic>ELEMENTS</topic><topic>Engineering Sciences</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>HEAT TREATMENTS</topic><topic>HYDROGEN COMPOUNDS</topic><topic>IONS</topic><topic>KINETICS</topic><topic>LINE BROADENING</topic><topic>MATERIALS SCIENCE</topic><topic>MONOCLINIC LATTICES</topic><topic>NONMETALS</topic><topic>OXIDES</topic><topic>OXYGEN</topic><topic>OXYGEN COMPOUNDS</topic><topic>POWDERS</topic><topic>REACTION KINETICS</topic><topic>SCATTERING</topic><topic>SIZE</topic><topic>SORPTION</topic><topic>STABILITY</topic><topic>TEMPERATURE DEPENDENCE</topic><topic>TEMPERATURE RANGE</topic><topic>TEMPERATURE RANGE 0400-1000 K</topic><topic>TEMPERATURE RANGE 1000-4000 K</topic><topic>TETRAGONAL LATTICES</topic><topic>TEXTURE</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>TRANSITION ELEMENT COMPOUNDS</topic><topic>WATER</topic><topic>X-RAY DIFFRACTION</topic><topic>ZIRCONIUM COMPOUNDS</topic><topic>ZIRCONIUM IONS</topic><topic>ZIRCONIUM OXIDES</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Methivier, A.</creatorcontrib><creatorcontrib>Pijolat, M.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>OSTI.GOV</collection><jtitle>Journal of catalysis</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Methivier, A.</au><au>Pijolat, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thermal Stability of Zirconia as a Catalyst Support: Kinetics and Modelling</atitle><jtitle>Journal of catalysis</jtitle><date>1993-02-01</date><risdate>1993</risdate><volume>139</volume><issue>2</issue><spage>329</spage><epage>337</epage><pages>329-337</pages><issn>0021-9517</issn><eissn>1090-2694</eissn><coden>JCTLA5</coden><abstract>The textural changes of two zirconium dioxide powders, one containing only tetragonal crystallites and the other a mixture of monoclinic and tetragonal crystallites, were investigated. The crystallite size increase was followed by means of X-ray diffraction line broadening for powders annealed in a controlled gaseous atmosphere at 600 and 770°C, in order to establish the variations of its experimental rate versus partial pressures of water and oxygen. An accelerating influence of water vapour was observed for both powders. A model, based on a catalytic effect of water vapour, and involving six elementary steps, was proposed in order to calculate theoretical rates within the approximation of the rate-limiting step. The comparison between the experimental and theoretical rate laws attests to the validity of the model and defines the most probable rate-limiting step: tetragonal crystallite growth proceeds at a rate controlled either by adsorption (or desorption) of water molecules or diffusion of hydroxyl groups: monoclinic crystallite growth is controlled by the diffusion of zirconium ions.</abstract><cop>Amsterdam</cop><pub>Elsevier Inc</pub><doi>10.1006/jcat.1993.1028</doi><tpages>9</tpages></addata></record> |
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| ispartof | Journal of catalysis, 1993-02, Vol.139 (2), p.329-337 |
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| subjects | 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies ADSORPTION ANNEALING Catalysis CATALYST SUPPORTS CATALYSTS Catalysts: preparations and properties CHALCOGENIDES CHARGED PARTICLES Chemical and Process Engineering CHEMICAL REACTION KINETICS Chemistry COHERENT SCATTERING CRYSTAL GROWTH CRYSTAL LATTICES CRYSTAL STRUCTURE DESORPTION DIFFRACTION DIFFUSION ELEMENTS Engineering Sciences Exact sciences and technology General and physical chemistry HEAT TREATMENTS HYDROGEN COMPOUNDS IONS KINETICS LINE BROADENING MATERIALS SCIENCE MONOCLINIC LATTICES NONMETALS OXIDES OXYGEN OXYGEN COMPOUNDS POWDERS REACTION KINETICS SCATTERING SIZE SORPTION STABILITY TEMPERATURE DEPENDENCE TEMPERATURE RANGE TEMPERATURE RANGE 0400-1000 K TEMPERATURE RANGE 1000-4000 K TETRAGONAL LATTICES TEXTURE Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry TRANSITION ELEMENT COMPOUNDS WATER X-RAY DIFFRACTION ZIRCONIUM COMPOUNDS ZIRCONIUM IONS ZIRCONIUM OXIDES |
| title | Thermal Stability of Zirconia as a Catalyst Support: Kinetics and Modelling |
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