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Hydrogenation of Toluene over La0.8Sr0.2Fe1-xCoxO3-z Perovskite Catalysts

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Published/Copyright: June 2, 2014
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Zeitschrift für Naturforschung B
From the journal Zeitschrift für Naturforschung B Volume 52 Issue 8

Abstract

The hydrogenation of toluene over perovskites of composition La0.8Sr0.2Fe1-x CoxO3-z (x = 0.0, 0.2, 0.5, 0.8 and 1.0) is reported. The catalyst material has been prepared by the coprecipitation method using maleic acid as the complexing agent. The activity for the gas phase reaction of toluene and hydrogen at temperatures between 50 °C to 300 °C is reported for as-prepared and activated materials.

The conversion has been found to be nearly temperature-independent over the as-prepared-per­ ovskites with a maximum of 40% conversion found for a composition La0.8Sr0.2Fe0.5Co0.5O2.86. Activation by an oxygen treatment at 500 °C was successful to enhance the activity of the Co-rich perovskites. All of these catalysts show a complete conversion of toluene at 100 °C, but activity decreases by time due to a reduction of the catalyst material. Again, La0.8Sr0.2Fe0.5Co0.5O2.86 exhibits the slowest loss of activity. A model for its special properties is mainly attributed to the p-type conduction behaviour.

The conversion behaviour of the perovskite type catalysts investigated here is compared to the results obtained with noble-metal supported catalysts and it can be concluded, that the perovskites exhibit higher conversion rates, maximum temperatures and higher cracking onset temperatures than these.

Keywords: Perovskites; Mixed Metal Oxides; Stability; Catalytic Hydrogenation; Catalytic Reduction
Received: 1997-4-11
Published Online: 2014-6-2
Published in Print: 1997-8-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

Articles in the same Issue

  1. Chlormethylchlorphosphane mit sperrigen Substituenten -Synthese und reduktive Enthalogenierung mit Fe2(CO)9 / Bulky Chloromethylchlorophosphines -Syntheses and Reductive Dehalogenation with Fe2 (CO)9
  2. Ein neues Verfahren zur numerischen Berechnung des Madelung-Anteils der Gitterenergie ionischer Kristalle / A New Method for the Numerical Calculation of the Madelung Contribution of the Lattice Energy in Ionic Crystals
  3. Synthesis and Crystal Structure of a Caesium Hydrogen Benzoylcyanoximate Complex with 18-Crown-6: Cs(18-Crown-6){H(L)2}
  4. Darstellung und Kristallstruktur von P4O8 / Preparation and Crystal Structure of P4O8
  5. Die Fulven-Route zum Pentaisopropylcyclopentadienid / The Fulvene Route to Pentaisopropylcyclopentadienide
  6. Synthese, Struktur-und EPR-Untersuchungen an 57Fe-markiertem Tetra-n-butylammonium-bis(1,1-dicyanoethen-2,2-dithiolato)nitrosyleisen(I), (n-Bu4N)2 [57Fe(NO)(i-mnt)2] / Synthesis, Structural, and EPR Investigations on 57Fe Enriched Tetra-n-butylammonium- bis(1,1-dicyanoethene-2,2-dithiolato)nitrosyliron(I), (n-Bu4N)2[57Fe(NO)(i-mnt)2]
  7. Hydrogenation of Toluene over La0.8Sr0.2Fe1-xCoxO3-z Perovskite Catalysts
  8. Darstellung, 11B-,13C-,1H-NMR- und Schwingungsspektren von Phenylundecahydro-closo-dodecaborat(2-) sowie Kristallstruktur von [As(C6H5)4]2[(C6H5)B12H11] / Preparation, 11B-, 13C-, 1H-NMR- and Vibrational Spectra of Phenylundecahydro-closo-dodecaborate(2-) and Crystal Structure of [As(C6H5)4]2[(C6H5)B12H11]
  9. Darstellung, 11B-, 1H-NMR und Schwingungsspektren von 4-Aminopyridylundecahydro-closo-dodecaborat(1-) sowie Kristallstruktur von (Ph4As)[(4-(NH)-C5H4N)B12H11]·2CH3CN / Synthesis, 11B , 1H NMR and Vibrational Spectra of 4-Aminopyridylundecahydro-closo- dodecaborate(1-) and Crystal Structure of (Ph4As)[(4-(NH)-C5H4N)B12H11]·2CH3CN
  10. A New Method for the Preparation of Ifosfamide and Cyclophosphamide
  11. N-Boryl-Substituted Bis(amino)stannylenes and -plumbylenes
  12. CuX (X = Br, I) Oligomers and Polymerie Chains in Tetramethylcyclotetra- arsoxane-Bridged Networks [CunXn{cyclo-(CH3AsO)4}2] (n = 4, 6, 8)
  13. Über die Bildung von N,N-Bistrifluormethylhydroxylammoniumsalzen (CF3)2N(X)OX+MF6- (X = H, D; M = As, Sb) / On the Formation of N,N-Bistrifluoromethylhydroxylammonium Salts (CF3)2N(X)OX+MF6- (X = H, D; M = As, Sb)
  14. Kristallstrukturen, Schwingungsspektren und Normalkoordinaten- analysen von cis- und trans-[OsX2(acac)2], X = Cl, Br, I / Crystal Structures, Vibrational Spectra and Normal Coordinate Analyses of cis- and trans-[OsX2(acac)2], X = Cl, Br, I
  15. Darstellung und Kristallstruktur von [P(C6H5)4]2[2-SnCl2(C6H5)B10H9] / Synthesis and Crystal Structure of [P(C6H5)4]2 [2-SnCl2(C6H5)B10H9]
  16. Synthesis and Crystal Structure of Tetraphenylarsonium Pentachlorocarbonylosmate(IV), (Ph4As)[OsCl5(CO)]
  17. Kurze O-O-Abstände einer gemeinsamen Polyederkante bei Verknüpfung von PO4-Tetraedern mit VO6-Oktaedern im Vanadyl-Orthophosphat CaNi(VO)(PO4)2 / Short O-O Distances in Edge Sharing PO4 Tetrahedra and VO6 Octahedra of the Vanadyl- Orthophosphate CaNi(VO)(PO4)2
  18. SrZn(VO)(PO4)2 und BaCd(VO)(PO4)2: Zum BaZn(VO)(PO4)2-Typ verwandte, jedoch nicht isotype Vanadylphosphate / SrZn(VO)(PO4)2 and BaCd(VO)(PO4)2: Vanadylphosphates Related but not Isotypic to the BaZn(VO)(PO4 )2 Type
  19. Über ein cadmiumreiches Orthovanadat Ba2,5Cd11(VO4)9 mit Cadmium in oktaedrischer und tetragonal pyramidaler Koordination / On a Cadmium Rich Orthovanadate Ba2,5Cd11(VO4)9 Showing Cadmium in Octahedral and Square Pyramidal Coordination
  20. Transition Metal Complexes of Diazenes, XL [1] Iron Carbonyl Assisted Formation of Bicyclic 1,2-Dihydropyrazol-3-ones from Pyrazolines and Alkynes
  21. Polysulfonylamine, XC [1] Carbonsäure-Dimere, Wasser-Dimere und 18-Krone-6-Moleküle als Baugruppen eines supramolekularen Kettenpolymers: Darstellung und Struktur von (CH2CH2O)6 • 4H2O • 2HN(SO2C6H4-4-COOH)2 / Polysulfonylamines, XC [1] Carboxylic Acid Dimers, Water Dimers and 18-Crown-6 Molecules as Building Blocks in a Supramolecular Chain Polymer: Synthesis and Structure of (CH2CH2O)6 · 4H2O · 2HN(SO2C6H4-4-COOH)2
  22. Synthese und Eigenschaften von trans-Bisnitro-phthalocyaninato(2-)iridat(III) und Pyridin-nitro-phthalocyaninato(2-)iridium(III); Kristallstruktur von linear- Bis(triphenylphosphin)iminium-trans-Bisnitro-phthalocyaninato(2-)iridat(III) / Synthesis and Properties of trans-Bisnitro-phthalocyaninato(2-)iridate(III) and Pyridine-nitro-phthalocyaninato(2-)iridium(III); Crystal Structure of linear- Bis(triphenylphosphine)iminium trans-Bisnitro-phthalocyaninato(2-)iridate(III)
  23. Mehrkernige CpZr(IV)-und CpHf(IV)-Komplexe mit Oximatobrücken / Polynuclear CpZr(IV) and CpHf(IV) Complexes with Oximato Bridges
  24. Notizen: Determination of Signs of Coupling Constants for (Ethene)bis- (triphenylphosphane)platinum(0)
https://doi.org/10.1515/znb-1997-0807
Keywords for this article
Perovskites; Mixed Metal Oxides; Stability; Catalytic Hydrogenation; Catalytic Reduction

Articles in the same Issue

  1. Chlormethylchlorphosphane mit sperrigen Substituenten -Synthese und reduktive Enthalogenierung mit Fe2(CO)9 / Bulky Chloromethylchlorophosphines -Syntheses and Reductive Dehalogenation with Fe2 (CO)9
  2. Ein neues Verfahren zur numerischen Berechnung des Madelung-Anteils der Gitterenergie ionischer Kristalle / A New Method for the Numerical Calculation of the Madelung Contribution of the Lattice Energy in Ionic Crystals
  3. Synthesis and Crystal Structure of a Caesium Hydrogen Benzoylcyanoximate Complex with 18-Crown-6: Cs(18-Crown-6){H(L)2}
  4. Darstellung und Kristallstruktur von P4O8 / Preparation and Crystal Structure of P4O8
  5. Die Fulven-Route zum Pentaisopropylcyclopentadienid / The Fulvene Route to Pentaisopropylcyclopentadienide
  6. Synthese, Struktur-und EPR-Untersuchungen an 57Fe-markiertem Tetra-n-butylammonium-bis(1,1-dicyanoethen-2,2-dithiolato)nitrosyleisen(I), (n-Bu4N)2 [57Fe(NO)(i-mnt)2] / Synthesis, Structural, and EPR Investigations on 57Fe Enriched Tetra-n-butylammonium- bis(1,1-dicyanoethene-2,2-dithiolato)nitrosyliron(I), (n-Bu4N)2[57Fe(NO)(i-mnt)2]
  7. Hydrogenation of Toluene over La0.8Sr0.2Fe1-xCoxO3-z Perovskite Catalysts
  8. Darstellung, 11B-,13C-,1H-NMR- und Schwingungsspektren von Phenylundecahydro-closo-dodecaborat(2-) sowie Kristallstruktur von [As(C6H5)4]2[(C6H5)B12H11] / Preparation, 11B-, 13C-, 1H-NMR- and Vibrational Spectra of Phenylundecahydro-closo-dodecaborate(2-) and Crystal Structure of [As(C6H5)4]2[(C6H5)B12H11]
  9. Darstellung, 11B-, 1H-NMR und Schwingungsspektren von 4-Aminopyridylundecahydro-closo-dodecaborat(1-) sowie Kristallstruktur von (Ph4As)[(4-(NH)-C5H4N)B12H11]·2CH3CN / Synthesis, 11B , 1H NMR and Vibrational Spectra of 4-Aminopyridylundecahydro-closo- dodecaborate(1-) and Crystal Structure of (Ph4As)[(4-(NH)-C5H4N)B12H11]·2CH3CN
  10. A New Method for the Preparation of Ifosfamide and Cyclophosphamide
  11. N-Boryl-Substituted Bis(amino)stannylenes and -plumbylenes
  12. CuX (X = Br, I) Oligomers and Polymerie Chains in Tetramethylcyclotetra- arsoxane-Bridged Networks [CunXn{cyclo-(CH3AsO)4}2] (n = 4, 6, 8)
  13. Über die Bildung von N,N-Bistrifluormethylhydroxylammoniumsalzen (CF3)2N(X)OX+MF6- (X = H, D; M = As, Sb) / On the Formation of N,N-Bistrifluoromethylhydroxylammonium Salts (CF3)2N(X)OX+MF6- (X = H, D; M = As, Sb)
  14. Kristallstrukturen, Schwingungsspektren und Normalkoordinaten- analysen von cis- und trans-[OsX2(acac)2], X = Cl, Br, I / Crystal Structures, Vibrational Spectra and Normal Coordinate Analyses of cis- and trans-[OsX2(acac)2], X = Cl, Br, I
  15. Darstellung und Kristallstruktur von [P(C6H5)4]2[2-SnCl2(C6H5)B10H9] / Synthesis and Crystal Structure of [P(C6H5)4]2 [2-SnCl2(C6H5)B10H9]
  16. Synthesis and Crystal Structure of Tetraphenylarsonium Pentachlorocarbonylosmate(IV), (Ph4As)[OsCl5(CO)]
  17. Kurze O-O-Abstände einer gemeinsamen Polyederkante bei Verknüpfung von PO4-Tetraedern mit VO6-Oktaedern im Vanadyl-Orthophosphat CaNi(VO)(PO4)2 / Short O-O Distances in Edge Sharing PO4 Tetrahedra and VO6 Octahedra of the Vanadyl- Orthophosphate CaNi(VO)(PO4)2
  18. SrZn(VO)(PO4)2 und BaCd(VO)(PO4)2: Zum BaZn(VO)(PO4)2-Typ verwandte, jedoch nicht isotype Vanadylphosphate / SrZn(VO)(PO4)2 and BaCd(VO)(PO4)2: Vanadylphosphates Related but not Isotypic to the BaZn(VO)(PO4 )2 Type
  19. Über ein cadmiumreiches Orthovanadat Ba2,5Cd11(VO4)9 mit Cadmium in oktaedrischer und tetragonal pyramidaler Koordination / On a Cadmium Rich Orthovanadate Ba2,5Cd11(VO4)9 Showing Cadmium in Octahedral and Square Pyramidal Coordination
  20. Transition Metal Complexes of Diazenes, XL [1] Iron Carbonyl Assisted Formation of Bicyclic 1,2-Dihydropyrazol-3-ones from Pyrazolines and Alkynes
  21. Polysulfonylamine, XC [1] Carbonsäure-Dimere, Wasser-Dimere und 18-Krone-6-Moleküle als Baugruppen eines supramolekularen Kettenpolymers: Darstellung und Struktur von (CH2CH2O)6 • 4H2O • 2HN(SO2C6H4-4-COOH)2 / Polysulfonylamines, XC [1] Carboxylic Acid Dimers, Water Dimers and 18-Crown-6 Molecules as Building Blocks in a Supramolecular Chain Polymer: Synthesis and Structure of (CH2CH2O)6 · 4H2O · 2HN(SO2C6H4-4-COOH)2
  22. Synthese und Eigenschaften von trans-Bisnitro-phthalocyaninato(2-)iridat(III) und Pyridin-nitro-phthalocyaninato(2-)iridium(III); Kristallstruktur von linear- Bis(triphenylphosphin)iminium-trans-Bisnitro-phthalocyaninato(2-)iridat(III) / Synthesis and Properties of trans-Bisnitro-phthalocyaninato(2-)iridate(III) and Pyridine-nitro-phthalocyaninato(2-)iridium(III); Crystal Structure of linear- Bis(triphenylphosphine)iminium trans-Bisnitro-phthalocyaninato(2-)iridate(III)
  23. Mehrkernige CpZr(IV)-und CpHf(IV)-Komplexe mit Oximatobrücken / Polynuclear CpZr(IV) and CpHf(IV) Complexes with Oximato Bridges
  24. Notizen: Determination of Signs of Coupling Constants for (Ethene)bis- (triphenylphosphane)platinum(0)
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