GRAIN GROWTH AND DENSIFICATION IN PALLADIUM OXIDE PARTICLES DURING SPRAY PYROLYSIS
A model for aerosol-phase densification of particles during their synthesis by spray pyrolysis is presented. The model was used to describe the evolution of the specific surface area of PdO powders synthesized at temperatures between 400 to 800 °C (residence times 27.9 to 22.7 s). Surface areas and...
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| Veröffentlicht in: | Chemical engineering communications 1996-09, Vol.151 (1), p.211-226 |
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| container_title | Chemical engineering communications |
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| creator | GURAV, A. S. PLUYM, T. C. KODAS, T. T. PRATSINIS, S. E. |
| description | A model for aerosol-phase densification of particles during their synthesis by spray pyrolysis is presented. The model was used to describe the evolution of the specific surface area of PdO powders synthesized at temperatures between 400 to 800 °C (residence times 27.9 to 22.7 s). Surface areas and grain sizes ranged between 56 m
2
/g and 4 nm at 400 °C to 3.2 m
2
/g and 40 nm at 800 °C The characteristic coalescence lime was determined as: τ= 1.7 x 10
13
T d
3
exp(1.3 x 10
5
/RT) [for lattice diffusion] and t = 2.7 x 10
19
Td
4
exp (1.6 x 10
5
/RT) [for grain boundary diffusion] (τ is in seconds, Tin degrees Kelvin, R is 8.314J/(mol.K)and d is in meters), but the data and model did not allow identification of the specific mechanism. The model provides a general approach for correlating changes in particle surface area with reactor operating conditions that is applicable to a wide variety of materials. |
| doi_str_mv | 10.1080/00986449608936549 |
| format | Article |
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2
/g and 4 nm at 400 °C to 3.2 m
2
/g and 40 nm at 800 °C The characteristic coalescence lime was determined as: τ= 1.7 x 10
13
T d
3
exp(1.3 x 10
5
/RT) [for lattice diffusion] and t = 2.7 x 10
19
Td
4
exp (1.6 x 10
5
/RT) [for grain boundary diffusion] (τ is in seconds, Tin degrees Kelvin, R is 8.314J/(mol.K)and d is in meters), but the data and model did not allow identification of the specific mechanism. The model provides a general approach for correlating changes in particle surface area with reactor operating conditions that is applicable to a wide variety of materials.</description><identifier>ISSN: 0098-6445</identifier><identifier>EISSN: 1563-5201</identifier><identifier>DOI: 10.1080/00986449608936549</identifier><identifier>CODEN: CEGCAK</identifier><language>eng</language><publisher>Elmont, NY: Taylor & Francis Group</publisher><subject>Chemistry ; Colloidal state and disperse state ; Densification ; Exact sciences and technology ; General and physical chemistry ; Grain growth ; Palladium oxide ; Physical and chemical studies. Granulometry. Electrokinetic phenomena ; Spray pyrolysis</subject><ispartof>Chemical engineering communications, 1996-09, Vol.151 (1), p.211-226</ispartof><rights>Copyright Taylor & Francis Group, LLC 1996</rights><rights>1996 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c325t-9f96a8603087c80dc5e3496bfa4261a5619607a11a3007575e7056d20d072c563</citedby><cites>FETCH-LOGICAL-c325t-9f96a8603087c80dc5e3496bfa4261a5619607a11a3007575e7056d20d072c563</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.tandfonline.com/doi/pdf/10.1080/00986449608936549$$EPDF$$P50$$Ginformaworld$$H</linktopdf><linktohtml>$$Uhttps://www.tandfonline.com/doi/full/10.1080/00986449608936549$$EHTML$$P50$$Ginformaworld$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,59647,60436</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=3244816$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>GURAV, A. S.</creatorcontrib><creatorcontrib>PLUYM, T. C.</creatorcontrib><creatorcontrib>KODAS, T. T.</creatorcontrib><creatorcontrib>PRATSINIS, S. E.</creatorcontrib><title>GRAIN GROWTH AND DENSIFICATION IN PALLADIUM OXIDE PARTICLES DURING SPRAY PYROLYSIS</title><title>Chemical engineering communications</title><description>A model for aerosol-phase densification of particles during their synthesis by spray pyrolysis is presented. The model was used to describe the evolution of the specific surface area of PdO powders synthesized at temperatures between 400 to 800 °C (residence times 27.9 to 22.7 s). Surface areas and grain sizes ranged between 56 m
2
/g and 4 nm at 400 °C to 3.2 m
2
/g and 40 nm at 800 °C The characteristic coalescence lime was determined as: τ= 1.7 x 10
13
T d
3
exp(1.3 x 10
5
/RT) [for lattice diffusion] and t = 2.7 x 10
19
Td
4
exp (1.6 x 10
5
/RT) [for grain boundary diffusion] (τ is in seconds, Tin degrees Kelvin, R is 8.314J/(mol.K)and d is in meters), but the data and model did not allow identification of the specific mechanism. The model provides a general approach for correlating changes in particle surface area with reactor operating conditions that is applicable to a wide variety of materials.</description><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Densification</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Grain growth</subject><subject>Palladium oxide</subject><subject>Physical and chemical studies. Granulometry. Electrokinetic phenomena</subject><subject>Spray pyrolysis</subject><issn>0098-6445</issn><issn>1563-5201</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><recordid>eNp1UE1Lw0AQXUTBWv0B3vbgNTqbzW424CU0aboQk7JJ0Z7Cmg-opE3ZFKT_3i1VL-JpGN7HzHsI3RN4JCDgCSAQ3PMCDiKgnHnBBZoQxqnDXCCXaHLCHUtg1-hmHD8ACKWETJBKVCgznKj8tVzgMItwFGeFnMtZWMo8wxZbhmkaRnL1gvM3GcV2V6WcpXGBo5WSWYKLpQrXeLlWebouZHGLrjrdj-3d95yi1TwuZwsnzRNrmzo1ddnBCbqAa8GBgvBrAU3NWmr_f--053KiGSc2jK8J0RTAZz5rfWC8caEB361ttCkiZ9_aDONo2q7am81Wm2NFoDqVUv0pxWoezpq9Hmvdd0bv6s34K6Su5wlysn4-0za7bjBb_TmYvqkO-tgP5kdD_7_yBQ2Qaug</recordid><startdate>19960901</startdate><enddate>19960901</enddate><creator>GURAV, A. S.</creator><creator>PLUYM, T. C.</creator><creator>KODAS, T. T.</creator><creator>PRATSINIS, S. E.</creator><general>Taylor & Francis Group</general><general>Taylor & Francis</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19960901</creationdate><title>GRAIN GROWTH AND DENSIFICATION IN PALLADIUM OXIDE PARTICLES DURING SPRAY PYROLYSIS</title><author>GURAV, A. S. ; PLUYM, T. C. ; KODAS, T. T. ; PRATSINIS, S. E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c325t-9f96a8603087c80dc5e3496bfa4261a5619607a11a3007575e7056d20d072c563</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1996</creationdate><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Densification</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Grain growth</topic><topic>Palladium oxide</topic><topic>Physical and chemical studies. Granulometry. Electrokinetic phenomena</topic><topic>Spray pyrolysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>GURAV, A. S.</creatorcontrib><creatorcontrib>PLUYM, T. C.</creatorcontrib><creatorcontrib>KODAS, T. T.</creatorcontrib><creatorcontrib>PRATSINIS, S. E.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Chemical engineering communications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>GURAV, A. S.</au><au>PLUYM, T. C.</au><au>KODAS, T. T.</au><au>PRATSINIS, S. E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>GRAIN GROWTH AND DENSIFICATION IN PALLADIUM OXIDE PARTICLES DURING SPRAY PYROLYSIS</atitle><jtitle>Chemical engineering communications</jtitle><date>1996-09-01</date><risdate>1996</risdate><volume>151</volume><issue>1</issue><spage>211</spage><epage>226</epage><pages>211-226</pages><issn>0098-6445</issn><eissn>1563-5201</eissn><coden>CEGCAK</coden><abstract>A model for aerosol-phase densification of particles during their synthesis by spray pyrolysis is presented. The model was used to describe the evolution of the specific surface area of PdO powders synthesized at temperatures between 400 to 800 °C (residence times 27.9 to 22.7 s). Surface areas and grain sizes ranged between 56 m
2
/g and 4 nm at 400 °C to 3.2 m
2
/g and 40 nm at 800 °C The characteristic coalescence lime was determined as: τ= 1.7 x 10
13
T d
3
exp(1.3 x 10
5
/RT) [for lattice diffusion] and t = 2.7 x 10
19
Td
4
exp (1.6 x 10
5
/RT) [for grain boundary diffusion] (τ is in seconds, Tin degrees Kelvin, R is 8.314J/(mol.K)and d is in meters), but the data and model did not allow identification of the specific mechanism. The model provides a general approach for correlating changes in particle surface area with reactor operating conditions that is applicable to a wide variety of materials.</abstract><cop>Elmont, NY</cop><pub>Taylor & Francis Group</pub><doi>10.1080/00986449608936549</doi><tpages>16</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0098-6445 |
| ispartof | Chemical engineering communications, 1996-09, Vol.151 (1), p.211-226 |
| issn | 0098-6445 1563-5201 |
| language | eng |
| recordid | cdi_pascalfrancis_primary_3244816 |
| source | Taylor & Francis:Master (3349 titles) |
| subjects | Chemistry Colloidal state and disperse state Densification Exact sciences and technology General and physical chemistry Grain growth Palladium oxide Physical and chemical studies. Granulometry. Electrokinetic phenomena Spray pyrolysis |
| title | GRAIN GROWTH AND DENSIFICATION IN PALLADIUM OXIDE PARTICLES DURING SPRAY PYROLYSIS |
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