FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2108575423> ?p ?o ?g. }

• W2108575423 endingPage "149" @default.
• W2108575423 startingPage "139" @default.
• W2108575423 abstract "The catalytic properties of Al2O3-supported vanadia with a wide range of VOx surface density (1.4–34.2 V/nm2) and structure were examined for the oxidative dehydrogenation of ethane and propane. UV–visible and Raman spectra showed that vanadia is dispersed predominately as isolated monovanadate species below ∼2.3 V/nm2. As surface densities increase, two-dimensional polyvanadates appear (2.3–7.0 V/nm2), along with increasing amounts of V2O5 crystallites at surface densities above 7.0 V/nm2. The rate constant for oxidative dehydrogenation (k1) and its ratio with alkane and alkene combustion (k2/k1 and k3/k1, respectively) were compared for both alkane reactants as a function of vanadia surface density. Propene formation rates (per V atom) are approximately eight times higher than ethene formation rates at a given reaction temperature, but the apparent ODH activation energies (E1) are similar for the two reactants and relatively insensitive to vanadia surface density. Ethene and propene formation rates (per V atom) are strongly influenced by vanadia surface density and reach a maximum value at intermediate surface densities (∼8 V/nm2). The ratio of k2/k1 depends weakly on reaction temperature, indicating that activation energies for alkane combustion and ODH reactions are similar. The ratio of k2/k1 is independent of surface density for ethane but increases slightly with vanadia surface density for propane, suggesting that isolated structures prevalent at low surface densities are slightly more selective for alkane dehydrogenation reactions. The ratio of k3/k1 decreases markedly with increasing reaction temperature for both ethane and propane ODH. Thus, the apparent activation energy for alkene combustion (E3) is much lower than that for alkane dehydrogenation (E1) and the difference between these two activation energies decreases with increasing surface density. The lower alkene selectivities observed at high vanadia surface densities are attributed to an increase in alkene adsorption enthalpies with increasing vanadia surface density. The highest yield of alkene is obtained for catalysts containing predominantly isolated monovanadate species and operated at high temperatures that avoid homogeneous reactions (<∼800 K)." @default.
• W2108575423 created "2016-06-24" @default.
• W2108575423 creator A5009307547 @default.
• W2108575423 creator A5029490756 @default.
• W2108575423 creator A5086150545 @default.
• W2108575423 creator A5087957929 @default.
• W2108575423 date "2002-05-01" @default.
• W2108575423 modified "2023-10-18" @default.
• W2108575423 title "Effect of Catalyst Structure on Oxidative Dehydrogenation of Ethane and Propane on Alumina-Supported Vanadia" @default.
• W2108575423 cites W1495428074 @default.
• W2108575423 cites W1506813101 @default.
• W2108575423 cites W174328607 @default.
• W2108575423 cites W183972707 @default.
• W2108575423 cites W1968479861 @default.
• W2108575423 cites W1984642771 @default.
• W2108575423 cites W2001730775 @default.
• W2108575423 cites W2008076879 @default.
• W2108575423 cites W2010385721 @default.
• W2108575423 cites W2013617902 @default.
• W2108575423 cites W2016753214 @default.
• W2108575423 cites W2018225712 @default.
• W2108575423 cites W2028862790 @default.
• W2108575423 cites W2029856157 @default.
• W2108575423 cites W2038006348 @default.
• W2108575423 cites W2042672217 @default.
• W2108575423 cites W2049918134 @default.
• W2108575423 cites W2068043331 @default.
• W2108575423 cites W2087498102 @default.
• W2108575423 cites W2090310105 @default.
• W2108575423 cites W2093067924 @default.
• W2108575423 cites W2099728949 @default.
• W2108575423 cites W2139715371 @default.
• W2108575423 cites W2158350431 @default.
• W2108575423 cites W2200386477 @default.
• W2108575423 cites W22244538 @default.
• W2108575423 cites W2315290228 @default.
• W2108575423 cites W2328033486 @default.
• W2108575423 cites W301007100 @default.
• W2108575423 doi "https://doi.org/10.1006/jcat.2002.3570" @default.
• W2108575423 hasPublicationYear "2002" @default.
• W2108575423 type Work @default.
• W2108575423 sameAs 2108575423 @default.
• W2108575423 citedByCount "296" @default.
• W2108575423 countsByYear W21085754232012 @default.
• W2108575423 countsByYear W21085754232013 @default.
• W2108575423 countsByYear W21085754232014 @default.
• W2108575423 countsByYear W21085754232015 @default.
• W2108575423 countsByYear W21085754232016 @default.
• W2108575423 countsByYear W21085754232017 @default.
• W2108575423 countsByYear W21085754232018 @default.
• W2108575423 countsByYear W21085754232019 @default.
• W2108575423 countsByYear W21085754232020 @default.
• W2108575423 countsByYear W21085754232021 @default.
• W2108575423 countsByYear W21085754232022 @default.
• W2108575423 countsByYear W21085754232023 @default.
• W2108575423 crossrefType "journal-article" @default.
• W2108575423 hasAuthorship W2108575423A5009307547 @default.
• W2108575423 hasAuthorship W2108575423A5029490756 @default.
• W2108575423 hasAuthorship W2108575423A5086150545 @default.
• W2108575423 hasAuthorship W2108575423A5087957929 @default.
• W2108575423 hasBestOaLocation W21085754232 @default.
• W2108575423 hasConcept C119889771 @default.
• W2108575423 hasConcept C161790260 @default.
• W2108575423 hasConcept C175583648 @default.
• W2108575423 hasConcept C178790620 @default.
• W2108575423 hasConcept C179104552 @default.
• W2108575423 hasConcept C185592680 @default.
• W2108575423 hasConcept C2776254738 @default.
• W2108575423 hasConcept C2776345496 @default.
• W2108575423 hasConcept C2777954637 @default.
• W2108575423 hasConcept C2781327020 @default.
• W2108575423 hasConcept C75473681 @default.
• W2108575423 hasConceptScore W2108575423C119889771 @default.
• W2108575423 hasConceptScore W2108575423C161790260 @default.
• W2108575423 hasConceptScore W2108575423C175583648 @default.
• W2108575423 hasConceptScore W2108575423C178790620 @default.
• W2108575423 hasConceptScore W2108575423C179104552 @default.
• W2108575423 hasConceptScore W2108575423C185592680 @default.
• W2108575423 hasConceptScore W2108575423C2776254738 @default.
• W2108575423 hasConceptScore W2108575423C2776345496 @default.
• W2108575423 hasConceptScore W2108575423C2777954637 @default.
• W2108575423 hasConceptScore W2108575423C2781327020 @default.
• W2108575423 hasConceptScore W2108575423C75473681 @default.
• W2108575423 hasIssue "1" @default.
• W2108575423 hasLocation W21085754231 @default.
• W2108575423 hasLocation W21085754232 @default.
• W2108575423 hasLocation W21085754233 @default.
• W2108575423 hasLocation W21085754234 @default.
• W2108575423 hasLocation W21085754235 @default.
• W2108575423 hasLocation W21085754236 @default.
• W2108575423 hasOpenAccess W2108575423 @default.
• W2108575423 hasPrimaryLocation W21085754231 @default.
• W2108575423 hasRelatedWork W1594494942 @default.
• W2108575423 hasRelatedWork W1976188632 @default.
• W2108575423 hasRelatedWork W1984435111 @default.
• W2108575423 hasRelatedWork W2008820337 @default.
• W2108575423 hasRelatedWork W2059651964 @default.
• W2108575423 hasRelatedWork W2071759908 @default.

• next