Details
| Translated title of the contribution | Structure and catalytic activity of hierarchically structured oxide catalysts - 2 |
|---|---|
| Original language | German |
| Pages | 1581,1656-1660 |
| Volume | 75 |
| Issue number | 11 |
| Journal | Chemie-Ingenieur-Technik |
| Publication status | Published - Nov 2003 |
Abstract
The catalytic oxidation dehydrogenation of propane to propylene was studied. Three possible active components, namely, TiO2, V2O5 and MoO3, were mustered onto two TiO2 carriers in a combinatorial sequence. The two TiO2 carriers were in the anatase modification (micrometer-TiO2 spray granulate and nanometer TiO2 from titanyl sulfate hydrolysis) with various BET surfaces. Using these two TiO2 carriers it is indicated that through a hierarchically constructed catalyst the propylene yield can be increased. The catalysts that contained the active component V2O5 or MoO3 in a nonostructured TiO2 intermediate layer in the TiO2 carrier proper, have a higher propylene yield in the oxidative propane dehydrogenation than catalyst without nanostructured TiO2 intermediate layer. Activity and propylene yields of the catalytically effective oxides increase in the sequence TiO2 < MoO3 < V2O5. Considering the various morphologies of the catalysts, the influence of an exchange effect of the carrier with the active components is clear. Although the content in active components was about equal, different catalyst morphologies gave different catalytic results. With the measurements to date the proposition of free reaction centers can not be completely confirmed or refuted. It remains to establish an influence of the carrier as the object of further studies using special high resolution structure studies (TEM, EXAFS, fine structure studies).
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Chemical Engineering(all)
- General Chemical Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Chemie-Ingenieur-Technik, Vol. 75, No. 11, 11.2003, p. 1581,1656-1660.
Research output: Contribution to specialist publication › Contribution in non-scientific journal › Transfer
}
TY - GEN
T1 - Aufbau und katalytische Aktivität hierarchisch strukturierter Oxid-Katalysatoren
T2 - Teil 2
AU - Stelzer, Jean Boris
AU - Habel, Daniela
AU - Pohl, Marga Martina
AU - Kosslick, Hendrick
AU - Feike, Egbert
AU - Caro, Jürgen
AU - Schubert, Helmut
PY - 2003/11
Y1 - 2003/11
N2 - The catalytic oxidation dehydrogenation of propane to propylene was studied. Three possible active components, namely, TiO2, V2O5 and MoO3, were mustered onto two TiO2 carriers in a combinatorial sequence. The two TiO2 carriers were in the anatase modification (micrometer-TiO2 spray granulate and nanometer TiO2 from titanyl sulfate hydrolysis) with various BET surfaces. Using these two TiO2 carriers it is indicated that through a hierarchically constructed catalyst the propylene yield can be increased. The catalysts that contained the active component V2O5 or MoO3 in a nonostructured TiO2 intermediate layer in the TiO2 carrier proper, have a higher propylene yield in the oxidative propane dehydrogenation than catalyst without nanostructured TiO2 intermediate layer. Activity and propylene yields of the catalytically effective oxides increase in the sequence TiO2 < MoO3 < V2O5. Considering the various morphologies of the catalysts, the influence of an exchange effect of the carrier with the active components is clear. Although the content in active components was about equal, different catalyst morphologies gave different catalytic results. With the measurements to date the proposition of free reaction centers can not be completely confirmed or refuted. It remains to establish an influence of the carrier as the object of further studies using special high resolution structure studies (TEM, EXAFS, fine structure studies).
AB - The catalytic oxidation dehydrogenation of propane to propylene was studied. Three possible active components, namely, TiO2, V2O5 and MoO3, were mustered onto two TiO2 carriers in a combinatorial sequence. The two TiO2 carriers were in the anatase modification (micrometer-TiO2 spray granulate and nanometer TiO2 from titanyl sulfate hydrolysis) with various BET surfaces. Using these two TiO2 carriers it is indicated that through a hierarchically constructed catalyst the propylene yield can be increased. The catalysts that contained the active component V2O5 or MoO3 in a nonostructured TiO2 intermediate layer in the TiO2 carrier proper, have a higher propylene yield in the oxidative propane dehydrogenation than catalyst without nanostructured TiO2 intermediate layer. Activity and propylene yields of the catalytically effective oxides increase in the sequence TiO2 < MoO3 < V2O5. Considering the various morphologies of the catalysts, the influence of an exchange effect of the carrier with the active components is clear. Although the content in active components was about equal, different catalyst morphologies gave different catalytic results. With the measurements to date the proposition of free reaction centers can not be completely confirmed or refuted. It remains to establish an influence of the carrier as the object of further studies using special high resolution structure studies (TEM, EXAFS, fine structure studies).
UR - http://www.scopus.com/inward/record.url?scp=0347930362&partnerID=8YFLogxK
M3 - Beitrag in Publikumszeitung/-zeitschrift
AN - SCOPUS:0347930362
VL - 75
SP - 1581,1656-1660
JO - Chemie-Ingenieur-Technik
JF - Chemie-Ingenieur-Technik
SN - 0009-286X
ER -