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n-Hexane conversion on γ-alumina supported palladium–platinum catalysts
Two series of Pd–Pt/Al 2 O 3 catalysts, characterized by high metal dispersions were prepared and investigated in the reaction of n -hexane conversion at the temperature
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| Published in: | Adsorption : journal of the International Adsorption Society 2019-05, Vol.25 (4), p.843-853 |
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| Main Authors: | , , , , , |
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| cited_by | cdi_FETCH-LOGICAL-c363t-45d2a7dcfe66e69fb9e09409a92563cd31694c6d26c372b81e1b2ddc553f825b3 |
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| cites | cdi_FETCH-LOGICAL-c363t-45d2a7dcfe66e69fb9e09409a92563cd31694c6d26c372b81e1b2ddc553f825b3 |
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| container_issue | 4 |
| container_start_page | 843 |
| container_title | Adsorption : journal of the International Adsorption Society |
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| creator | Radlik, Monika Śrębowata, Anna Juszczyk, Wojciech Matus, Krzysztof Małolepszy, Artur Karpiński, Zbigniew |
| description | Two series of Pd–Pt/Al
2
O
3
catalysts, characterized by high metal dispersions were prepared and investigated in the reaction of
n
-hexane conversion at the temperature |
| doi_str_mv | 10.1007/s10450-019-00083-9 |
| format | article |
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2
O
3
catalysts, characterized by high metal dispersions were prepared and investigated in the reaction of
n
-hexane conversion at the temperature < 300 °C. Incipient wetness co-impregnation of γ-alumina with the solutions of Pd(acac)
2
and Pt(acac)
2
led to relatively good Pd–Pt alloying. However, a similar catalyst preparation using solutions of PdCl
2
and H
2
PtCl
6
resulted in unsatisfactory homogenization; furthermore, significant amounts of chlorine were retained in the catalysts. The Pd–Pt alloy homogeneity has a significant effect on the relations of catalytic activities and product selectivities with Pd–Pt alloy composition. The relationship between the catalytic activity of chlorine-free Pd–Pt/Al
2
O
3
catalysts and bulk Pd–Pt composition matches the accepted relation between the surface composition and bulk composition of Pd–Pt, reflecting a high surface enrichment in palladium. In contrast, for the chloride series of Pd–Pt/Al
2
O
3
, variations of the turnover frequency are directly correlated with the bulk composition, indicating that unalloyed, more active, Pt particles decide about the catalytic behavior. Pd/Al
2
O
3
shows better than Pt/Al
2
O
3
selectivity for isomerization, especially after reduction at higher temperatures, ≥ 500 °C. On alloying with Pt, for the Cl-free series the isomerization selectivity was very high for nearly all bimetallic catalysts and showed a synergistic effect for 20 at.% Pt. In contrast, for the Cl-containing series, the isomerization selectivity was proportional to the palladium content. The effect of reduction temperature on the isomerization propensity of Cl-containing Pd–Pt/Al
2
O
3
catalysts was rather small, suggesting that possible variations in support acidity associated with chloride presence do not have large catalytic consequences, confirming the metal-only catalytic action in alkane isomerization carried out at the temperatures below 300 °C.</description><identifier>ISSN: 0929-5607</identifier><identifier>EISSN: 1572-8757</identifier><identifier>DOI: 10.1007/s10450-019-00083-9</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Alkanes ; Alloying ; Aluminum oxide ; Bimetals ; Catalysis ; Catalysts ; Catalytic activity ; Chemistry ; Chemistry and Materials Science ; Chlorine ; Composition ; Conversion ; Engineering Thermodynamics ; Heat and Mass Transfer ; Industrial Chemistry/Chemical Engineering ; Isomerization ; Moisture content ; Palladium ; Platinum ; Platinum base alloys ; Reduction ; Selectivity ; Surfaces and Interfaces ; Synergistic effect ; Thin Films ; Transitional aluminas</subject><ispartof>Adsorption : journal of the International Adsorption Society, 2019-05, Vol.25 (4), p.843-853</ispartof><rights>The Author(s) 2019</rights><rights>Copyright Springer Nature B.V. 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c363t-45d2a7dcfe66e69fb9e09409a92563cd31694c6d26c372b81e1b2ddc553f825b3</citedby><cites>FETCH-LOGICAL-c363t-45d2a7dcfe66e69fb9e09409a92563cd31694c6d26c372b81e1b2ddc553f825b3</cites><orcidid>0000-0001-7395-0670</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27915,27916</link.rule.ids></links><search><creatorcontrib>Radlik, Monika</creatorcontrib><creatorcontrib>Śrębowata, Anna</creatorcontrib><creatorcontrib>Juszczyk, Wojciech</creatorcontrib><creatorcontrib>Matus, Krzysztof</creatorcontrib><creatorcontrib>Małolepszy, Artur</creatorcontrib><creatorcontrib>Karpiński, Zbigniew</creatorcontrib><title>n-Hexane conversion on γ-alumina supported palladium–platinum catalysts</title><title>Adsorption : journal of the International Adsorption Society</title><addtitle>Adsorption</addtitle><description>Two series of Pd–Pt/Al
2
O
3
catalysts, characterized by high metal dispersions were prepared and investigated in the reaction of
n
-hexane conversion at the temperature < 300 °C. Incipient wetness co-impregnation of γ-alumina with the solutions of Pd(acac)
2
and Pt(acac)
2
led to relatively good Pd–Pt alloying. However, a similar catalyst preparation using solutions of PdCl
2
and H
2
PtCl
6
resulted in unsatisfactory homogenization; furthermore, significant amounts of chlorine were retained in the catalysts. The Pd–Pt alloy homogeneity has a significant effect on the relations of catalytic activities and product selectivities with Pd–Pt alloy composition. The relationship between the catalytic activity of chlorine-free Pd–Pt/Al
2
O
3
catalysts and bulk Pd–Pt composition matches the accepted relation between the surface composition and bulk composition of Pd–Pt, reflecting a high surface enrichment in palladium. In contrast, for the chloride series of Pd–Pt/Al
2
O
3
, variations of the turnover frequency are directly correlated with the bulk composition, indicating that unalloyed, more active, Pt particles decide about the catalytic behavior. Pd/Al
2
O
3
shows better than Pt/Al
2
O
3
selectivity for isomerization, especially after reduction at higher temperatures, ≥ 500 °C. On alloying with Pt, for the Cl-free series the isomerization selectivity was very high for nearly all bimetallic catalysts and showed a synergistic effect for 20 at.% Pt. In contrast, for the Cl-containing series, the isomerization selectivity was proportional to the palladium content. The effect of reduction temperature on the isomerization propensity of Cl-containing Pd–Pt/Al
2
O
3
catalysts was rather small, suggesting that possible variations in support acidity associated with chloride presence do not have large catalytic consequences, confirming the metal-only catalytic action in alkane isomerization carried out at the temperatures below 300 °C.</description><subject>Alkanes</subject><subject>Alloying</subject><subject>Aluminum oxide</subject><subject>Bimetals</subject><subject>Catalysis</subject><subject>Catalysts</subject><subject>Catalytic activity</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Chlorine</subject><subject>Composition</subject><subject>Conversion</subject><subject>Engineering Thermodynamics</subject><subject>Heat and Mass Transfer</subject><subject>Industrial Chemistry/Chemical Engineering</subject><subject>Isomerization</subject><subject>Moisture content</subject><subject>Palladium</subject><subject>Platinum</subject><subject>Platinum base alloys</subject><subject>Reduction</subject><subject>Selectivity</subject><subject>Surfaces and Interfaces</subject><subject>Synergistic effect</subject><subject>Thin Films</subject><subject>Transitional aluminas</subject><issn>0929-5607</issn><issn>1572-8757</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp9kEFKxDAUhoMoOI5ewFXBdfQlaZJmKYM6yoAbXYc0SaVDm9akFd15B4_iPTyEJ7FawZ3w4N98___gQ-iYwCkBkGeJQM4BA1EYAAqG1Q5aEC4pLiSXu2gBiirMBch9dJDSdoKUkGyBbgJe-2cTfGa78ORjqruQTffxjk0ztnUwWRr7vouDd1lvmsa4emw_X9_6xgx1GNvMmsE0L2lIh2ivMk3yR7-5RPeXF3erNd7cXl2vzjfYMsEGnHNHjXS28kJ4oapSeVA5KKMoF8w6RoTKrXBUWCZpWRBPSuqc5ZxVBeUlW6KTebeP3ePo06C33RjD9FJTyignUORsouhM2dilFH2l-1i3Jr5oAvrbmZ6d6cmZ_nGm1VRicylNcHjw8W_6n9YXtsBxNg</recordid><startdate>20190515</startdate><enddate>20190515</enddate><creator>Radlik, Monika</creator><creator>Śrębowata, Anna</creator><creator>Juszczyk, Wojciech</creator><creator>Matus, Krzysztof</creator><creator>Małolepszy, Artur</creator><creator>Karpiński, Zbigniew</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>C6C</scope><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0001-7395-0670</orcidid></search><sort><creationdate>20190515</creationdate><title>n-Hexane conversion on γ-alumina supported palladium–platinum catalysts</title><author>Radlik, Monika ; Śrębowata, Anna ; Juszczyk, Wojciech ; Matus, Krzysztof ; Małolepszy, Artur ; Karpiński, Zbigniew</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c363t-45d2a7dcfe66e69fb9e09409a92563cd31694c6d26c372b81e1b2ddc553f825b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Alkanes</topic><topic>Alloying</topic><topic>Aluminum oxide</topic><topic>Bimetals</topic><topic>Catalysis</topic><topic>Catalysts</topic><topic>Catalytic activity</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Chlorine</topic><topic>Composition</topic><topic>Conversion</topic><topic>Engineering Thermodynamics</topic><topic>Heat and Mass Transfer</topic><topic>Industrial Chemistry/Chemical Engineering</topic><topic>Isomerization</topic><topic>Moisture content</topic><topic>Palladium</topic><topic>Platinum</topic><topic>Platinum base alloys</topic><topic>Reduction</topic><topic>Selectivity</topic><topic>Surfaces and Interfaces</topic><topic>Synergistic effect</topic><topic>Thin Films</topic><topic>Transitional aluminas</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Radlik, Monika</creatorcontrib><creatorcontrib>Śrębowata, Anna</creatorcontrib><creatorcontrib>Juszczyk, Wojciech</creatorcontrib><creatorcontrib>Matus, Krzysztof</creatorcontrib><creatorcontrib>Małolepszy, Artur</creatorcontrib><creatorcontrib>Karpiński, Zbigniew</creatorcontrib><collection>SpringerOpen</collection><collection>CrossRef</collection><jtitle>Adsorption : journal of the International Adsorption Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Radlik, Monika</au><au>Śrębowata, Anna</au><au>Juszczyk, Wojciech</au><au>Matus, Krzysztof</au><au>Małolepszy, Artur</au><au>Karpiński, Zbigniew</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>n-Hexane conversion on γ-alumina supported palladium–platinum catalysts</atitle><jtitle>Adsorption : journal of the International Adsorption Society</jtitle><stitle>Adsorption</stitle><date>2019-05-15</date><risdate>2019</risdate><volume>25</volume><issue>4</issue><spage>843</spage><epage>853</epage><pages>843-853</pages><issn>0929-5607</issn><eissn>1572-8757</eissn><abstract>Two series of Pd–Pt/Al
2
O
3
catalysts, characterized by high metal dispersions were prepared and investigated in the reaction of
n
-hexane conversion at the temperature < 300 °C. Incipient wetness co-impregnation of γ-alumina with the solutions of Pd(acac)
2
and Pt(acac)
2
led to relatively good Pd–Pt alloying. However, a similar catalyst preparation using solutions of PdCl
2
and H
2
PtCl
6
resulted in unsatisfactory homogenization; furthermore, significant amounts of chlorine were retained in the catalysts. The Pd–Pt alloy homogeneity has a significant effect on the relations of catalytic activities and product selectivities with Pd–Pt alloy composition. The relationship between the catalytic activity of chlorine-free Pd–Pt/Al
2
O
3
catalysts and bulk Pd–Pt composition matches the accepted relation between the surface composition and bulk composition of Pd–Pt, reflecting a high surface enrichment in palladium. In contrast, for the chloride series of Pd–Pt/Al
2
O
3
, variations of the turnover frequency are directly correlated with the bulk composition, indicating that unalloyed, more active, Pt particles decide about the catalytic behavior. Pd/Al
2
O
3
shows better than Pt/Al
2
O
3
selectivity for isomerization, especially after reduction at higher temperatures, ≥ 500 °C. On alloying with Pt, for the Cl-free series the isomerization selectivity was very high for nearly all bimetallic catalysts and showed a synergistic effect for 20 at.% Pt. In contrast, for the Cl-containing series, the isomerization selectivity was proportional to the palladium content. The effect of reduction temperature on the isomerization propensity of Cl-containing Pd–Pt/Al
2
O
3
catalysts was rather small, suggesting that possible variations in support acidity associated with chloride presence do not have large catalytic consequences, confirming the metal-only catalytic action in alkane isomerization carried out at the temperatures below 300 °C.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10450-019-00083-9</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0001-7395-0670</orcidid><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 0929-5607 |
| ispartof | Adsorption : journal of the International Adsorption Society, 2019-05, Vol.25 (4), p.843-853 |
| issn | 0929-5607 1572-8757 |
| language | eng |
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| source | Springer Nature |
| subjects | Alkanes Alloying Aluminum oxide Bimetals Catalysis Catalysts Catalytic activity Chemistry Chemistry and Materials Science Chlorine Composition Conversion Engineering Thermodynamics Heat and Mass Transfer Industrial Chemistry/Chemical Engineering Isomerization Moisture content Palladium Platinum Platinum base alloys Reduction Selectivity Surfaces and Interfaces Synergistic effect Thin Films Transitional aluminas |
| title | n-Hexane conversion on γ-alumina supported palladium–platinum catalysts |
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