About: Transport-related structure characteristics of FCC catalysts from sorption, porosimetric and PFG NMR measurements     Goto   Sponge   NotDistinct   Permalink

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  • Texturní charakteristiky katalyzátorů pro fluidní krakování byly vyhodnoceny z měření adsorpce N2 a rtuťové porozimetrie. V ložích částic FCC katalyzátorů byla nalezena a kvantitativně určena hierarchie dutin ve čtyřech úrovních velikosti. Difúzní koeficienty n-oktanu v částici byly měřeny PFG NMR technikou v loži katalyzátorů. Difúzní koeficienty vykazují lineární závislost na parametru .xi., který zahrnuje střední hodnotu poloměru póru v příslušné oblasti porozity a funkci příslušné porozity. Byla nalezena také silná lineární korelace mezi parametrem .xi. pro makropóry a mezopóry. Střední velikosti makro- a mezopórů se tak stávají klíčovým parametrem pro naladění vlastností FCC katalyzátorů. (cs)
  • Texture characteristics of fluid catalytic cracking (FCC) catalysts were evaluated from N2 adsorption and mercury porosimetry measurements. A hierarchy of four levels of voids were found and quantified in the beds of FCC particles. Diffusion coefficients of intraparticle diffusion for n-octane were measured in the catalyst beds by PFG NMR technique. The diffusion coefficients exhibit a linear dependence on parameters .xi. that involve the mean value of the pore radii r in the pertinent porosity region and a function of the corresponding porosity. A strong linear correlation was also found between the parameter .xi. for macropores and that for mesopores. The mean sizes of macro- and mesopores thus become key parameters in tuning the FCC catalyst properties.
  • Texture characteristics of fluid catalytic cracking (FCC) catalysts were evaluated from N2 adsorption and mercury porosimetry measurements. A hierarchy of four levels of voids were found and quantified in the beds of FCC particles. Diffusion coefficients of intraparticle diffusion for n-octane were measured in the catalyst beds by PFG NMR technique. The diffusion coefficients exhibit a linear dependence on parameters .xi. that involve the mean value of the pore radii r in the pertinent porosity region and a function of the corresponding porosity. A strong linear correlation was also found between the parameter .xi. for macropores and that for mesopores. The mean sizes of macro- and mesopores thus become key parameters in tuning the FCC catalyst properties. (en)
Title
  • Transport-related structure characteristics of FCC catalysts from sorption, porosimetric and PFG NMR measurements
  • Strukturní a transportní charakteristiky FCC katalyzátorů vyhodnocené ze sorpčních, porozimetrických a PFG měření (cs)
  • Transport-related structure characteristics of FCC catalysts from sorption, porosimetric and PFG NMR measurements (en)
skos:prefLabel
  • Transport-related structure characteristics of FCC catalysts from sorption, porosimetric and PFG NMR measurements
  • Strukturní a transportní charakteristiky FCC katalyzátorů vyhodnocené ze sorpčních, porozimetrických a PFG měření (cs)
  • Transport-related structure characteristics of FCC catalysts from sorption, porosimetric and PFG NMR measurements (en)
skos:notation
  • RIV/61388955:_____/05:00001176!RIV06-AV0-61388955
http://linked.open.../vavai/riv/strany
  • 1043;1050
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(AV0Z40400503)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
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http://linked.open...iv/duvernostUdaju
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  • 547151
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  • RIV/61388955:_____/05:00001176
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • FCC catalysts; PFG NMR technique; SEM image (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [54FB22B97694]
http://linked.open...v/mistoKonaniAkce
  • Praha
http://linked.open...i/riv/mistoVydani
  • Amsterdam
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  • Molecular Sieves: From Basic Research to Industrial Applications
http://linked.open...in/vavai/riv/obor
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http://linked.open...iv/tvurceVysledku
  • Šolcová, Olga
  • Kočiřík, Milan
  • Zikánová, Arlette
  • Jirglová, Hana
  • Bernauer, B.
  • Vasenkov, S.
  • Kärger, J.
  • Krystl, V.
  • Drescher, B.
  • Kortunov, P.
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
http://linked.open...n/vavai/riv/zamer
number of pages
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  • Elsevier
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  • 0-444-52082-1
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