The influence of pore geometry of Pt containing ZSM-5, Beta and SBA-15 catalysts on dehydrogenation of propane
The influence of the pore geometry of the catalyst supports on dehydrogenation of propane (DHP) activity, selectivity to propylene and the degree of coke formation was evaluated over micro-(Pt-ZSM-5 and Pt-Beta) and meso-(Pt-SBA-15) porous materials in a tapered element oscillating microbalance (TEO...
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Veröffentlicht in: | Microporous and mesoporous materials 2009-11, Vol.126 (1), p.152-158 |
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description | The influence of the pore geometry of the catalyst supports on dehydrogenation of propane (DHP) activity, selectivity to propylene and the degree of coke formation was evaluated over micro-(Pt-ZSM-5 and Pt-Beta) and meso-(Pt-SBA-15) porous materials in a tapered element oscillating microbalance (TEOM) reactor by analyzing reaction products and mass changes simultaneously. The catalysts were prepared by incipient wetness impregnation and were characterized by N
2-physisorption, X-ray diffraction (XRD) and H
2-chemisorption. The characterization results indicate that catalysts contain Pt within the pores and Pt nanoparticles of more or less similar sizes however stabilized on markedly different pore geometries (structure and size). This allowed to (i) largely marginalize the effect of the sizes of Pt particles on DHP and (ii) evaluate exclusively the vital role of pore geometry of the supports, where a fraction of Pt is located within the pores, on the catalytic performance. Pt-ZSM-5 presents the highest propane conversion followed by Pt-Beta and Pt-SBA-15 indicating that the activity decreases with increasing pore size (ZSM-5
<
Beta
<
SBA-15) of the support. TEOM results evidence that the amount of coke formed during DHP is the highest on Pt-ZSM-5 and is the lowest on Pt-Beta thus, the latter exhibits better catalytic stability than the former and Pt-SBA-15. Among Pt-ZSM-5 and Pt-SBA-15, the former shows better selectivity and stability than the latter despite higher coke content. These observations demonstrate that the three dimensional microporous materials are better catalytic supports for DHP than the mesoporous SBA-15 because of their intrinsic nature that may induce optimum catalytic properties of Pt sites. |
doi_str_mv | 10.1016/j.micromeso.2009.05.031 |
format | Article |
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2-physisorption, X-ray diffraction (XRD) and H
2-chemisorption. The characterization results indicate that catalysts contain Pt within the pores and Pt nanoparticles of more or less similar sizes however stabilized on markedly different pore geometries (structure and size). This allowed to (i) largely marginalize the effect of the sizes of Pt particles on DHP and (ii) evaluate exclusively the vital role of pore geometry of the supports, where a fraction of Pt is located within the pores, on the catalytic performance. Pt-ZSM-5 presents the highest propane conversion followed by Pt-Beta and Pt-SBA-15 indicating that the activity decreases with increasing pore size (ZSM-5
<
Beta
<
SBA-15) of the support. TEOM results evidence that the amount of coke formed during DHP is the highest on Pt-ZSM-5 and is the lowest on Pt-Beta thus, the latter exhibits better catalytic stability than the former and Pt-SBA-15. Among Pt-ZSM-5 and Pt-SBA-15, the former shows better selectivity and stability than the latter despite higher coke content. These observations demonstrate that the three dimensional microporous materials are better catalytic supports for DHP than the mesoporous SBA-15 because of their intrinsic nature that may induce optimum catalytic properties of Pt sites.</description><identifier>ISSN: 1387-1811</identifier><identifier>EISSN: 1873-3093</identifier><identifier>DOI: 10.1016/j.micromeso.2009.05.031</identifier><language>eng</language><publisher>San Diego, CA: Elsevier Inc</publisher><subject>Catalysis ; Chemistry ; Coking ; Colloidal state and disperse state ; Exact sciences and technology ; General and physical chemistry ; Ion-exchange ; Physical and chemical studies. Granulometry. Electrokinetic phenomena ; Pore geometry ; Porous materials ; Propane dehydrogenation ; Pt-SBA-15 ; Pt-zeolites ; Surface physical chemistry ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; Zeolites: preparations and properties</subject><ispartof>Microporous and mesoporous materials, 2009-11, Vol.126 (1), p.152-158</ispartof><rights>2009 Elsevier Inc.</rights><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c479t-c90520021d821b91d293731cef98932b6bf1d60086ec26a4a3c7bac0c2dae42b3</citedby><cites>FETCH-LOGICAL-c479t-c90520021d821b91d293731cef98932b6bf1d60086ec26a4a3c7bac0c2dae42b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S1387181109002765$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22044527$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Santhosh Kumar, M.</creatorcontrib><creatorcontrib>Holmen, Anders</creatorcontrib><creatorcontrib>Chen, De</creatorcontrib><title>The influence of pore geometry of Pt containing ZSM-5, Beta and SBA-15 catalysts on dehydrogenation of propane</title><title>Microporous and mesoporous materials</title><description>The influence of the pore geometry of the catalyst supports on dehydrogenation of propane (DHP) activity, selectivity to propylene and the degree of coke formation was evaluated over micro-(Pt-ZSM-5 and Pt-Beta) and meso-(Pt-SBA-15) porous materials in a tapered element oscillating microbalance (TEOM) reactor by analyzing reaction products and mass changes simultaneously. The catalysts were prepared by incipient wetness impregnation and were characterized by N
2-physisorption, X-ray diffraction (XRD) and H
2-chemisorption. The characterization results indicate that catalysts contain Pt within the pores and Pt nanoparticles of more or less similar sizes however stabilized on markedly different pore geometries (structure and size). This allowed to (i) largely marginalize the effect of the sizes of Pt particles on DHP and (ii) evaluate exclusively the vital role of pore geometry of the supports, where a fraction of Pt is located within the pores, on the catalytic performance. Pt-ZSM-5 presents the highest propane conversion followed by Pt-Beta and Pt-SBA-15 indicating that the activity decreases with increasing pore size (ZSM-5
<
Beta
<
SBA-15) of the support. TEOM results evidence that the amount of coke formed during DHP is the highest on Pt-ZSM-5 and is the lowest on Pt-Beta thus, the latter exhibits better catalytic stability than the former and Pt-SBA-15. Among Pt-ZSM-5 and Pt-SBA-15, the former shows better selectivity and stability than the latter despite higher coke content. These observations demonstrate that the three dimensional microporous materials are better catalytic supports for DHP than the mesoporous SBA-15 because of their intrinsic nature that may induce optimum catalytic properties of Pt sites.</description><subject>Catalysis</subject><subject>Chemistry</subject><subject>Coking</subject><subject>Colloidal state and disperse state</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Ion-exchange</subject><subject>Physical and chemical studies. Granulometry. Electrokinetic phenomena</subject><subject>Pore geometry</subject><subject>Porous materials</subject><subject>Propane dehydrogenation</subject><subject>Pt-SBA-15</subject><subject>Pt-zeolites</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><issn>1387-1811</issn><issn>1873-3093</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqFkE9vGyEQxVdVIzVN8hnKpT11twzsP46O1bSRXCVSnEsviIVZG2sNLuBK_vZh5SjXnIZBb96b-RXFF6AVUGh_7Kq91cHvMfqKUSoq2lSUw4fiEvqOl5wK_jG_ed-V0AN8Kj7HuKMUOmBwWbj1Fol143REp5H4kRx8QLLBbJjCaf54TER7l5R11m3I36c_ZfOd3GJSRDlDnm4XJTREq6SmU0yReEcMbk8m-A06lWzuZ9fgD8rhdXExqinizWu9Kp7vfq6Xv8vVw6_75WJV6roTqdSCNvkWBqZnMAgwTPCOg8ZR9IKzoR1GMC2lfYuatapWXHeD0lQzo7BmA78qvp19c-6_I8Yk9zZqnKa8gz9GyWvBe9GILOzOwowwxoCjPAS7V-EkgcqZr9zJN75y5itpIzPfPPn1NUJFraYxKKdtfBtnjNZ1w7qsW5x1mO_9bzHIqO0M29iAOknj7btZLyq8lPc</recordid><startdate>20091101</startdate><enddate>20091101</enddate><creator>Santhosh Kumar, M.</creator><creator>Holmen, Anders</creator><creator>Chen, De</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>7U5</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20091101</creationdate><title>The influence of pore geometry of Pt containing ZSM-5, Beta and SBA-15 catalysts on dehydrogenation of propane</title><author>Santhosh Kumar, M. ; Holmen, Anders ; Chen, De</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c479t-c90520021d821b91d293731cef98932b6bf1d60086ec26a4a3c7bac0c2dae42b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Catalysis</topic><topic>Chemistry</topic><topic>Coking</topic><topic>Colloidal state and disperse state</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Ion-exchange</topic><topic>Physical and chemical studies. Granulometry. Electrokinetic phenomena</topic><topic>Pore geometry</topic><topic>Porous materials</topic><topic>Propane dehydrogenation</topic><topic>Pt-SBA-15</topic><topic>Pt-zeolites</topic><topic>Surface physical chemistry</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>Zeolites: preparations and properties</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Santhosh Kumar, M.</creatorcontrib><creatorcontrib>Holmen, Anders</creatorcontrib><creatorcontrib>Chen, De</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Microporous and mesoporous materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Santhosh Kumar, M.</au><au>Holmen, Anders</au><au>Chen, De</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The influence of pore geometry of Pt containing ZSM-5, Beta and SBA-15 catalysts on dehydrogenation of propane</atitle><jtitle>Microporous and mesoporous materials</jtitle><date>2009-11-01</date><risdate>2009</risdate><volume>126</volume><issue>1</issue><spage>152</spage><epage>158</epage><pages>152-158</pages><issn>1387-1811</issn><eissn>1873-3093</eissn><abstract>The influence of the pore geometry of the catalyst supports on dehydrogenation of propane (DHP) activity, selectivity to propylene and the degree of coke formation was evaluated over micro-(Pt-ZSM-5 and Pt-Beta) and meso-(Pt-SBA-15) porous materials in a tapered element oscillating microbalance (TEOM) reactor by analyzing reaction products and mass changes simultaneously. The catalysts were prepared by incipient wetness impregnation and were characterized by N
2-physisorption, X-ray diffraction (XRD) and H
2-chemisorption. The characterization results indicate that catalysts contain Pt within the pores and Pt nanoparticles of more or less similar sizes however stabilized on markedly different pore geometries (structure and size). This allowed to (i) largely marginalize the effect of the sizes of Pt particles on DHP and (ii) evaluate exclusively the vital role of pore geometry of the supports, where a fraction of Pt is located within the pores, on the catalytic performance. Pt-ZSM-5 presents the highest propane conversion followed by Pt-Beta and Pt-SBA-15 indicating that the activity decreases with increasing pore size (ZSM-5
<
Beta
<
SBA-15) of the support. TEOM results evidence that the amount of coke formed during DHP is the highest on Pt-ZSM-5 and is the lowest on Pt-Beta thus, the latter exhibits better catalytic stability than the former and Pt-SBA-15. Among Pt-ZSM-5 and Pt-SBA-15, the former shows better selectivity and stability than the latter despite higher coke content. These observations demonstrate that the three dimensional microporous materials are better catalytic supports for DHP than the mesoporous SBA-15 because of their intrinsic nature that may induce optimum catalytic properties of Pt sites.</abstract><cop>San Diego, CA</cop><pub>Elsevier Inc</pub><doi>10.1016/j.micromeso.2009.05.031</doi><tpages>7</tpages></addata></record> |
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subjects | Catalysis Chemistry Coking Colloidal state and disperse state Exact sciences and technology General and physical chemistry Ion-exchange Physical and chemical studies. Granulometry. Electrokinetic phenomena Pore geometry Porous materials Propane dehydrogenation Pt-SBA-15 Pt-zeolites Surface physical chemistry Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Zeolites: preparations and properties |
title | The influence of pore geometry of Pt containing ZSM-5, Beta and SBA-15 catalysts on dehydrogenation of propane |
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