Journal Title
Title of Journal: Top Catal
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Abbravation: Topics in Catalysis
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Authors: Matteo Lualdi Sara Lögdberg Gabriella Di Carlo Sven Järås Magali Boutonnet Anna Maria Venezia Edd A Blekkan Anders Holmen
Publish Date: 2011/09/07
Volume: 54, Issue: 16-18, Pages: 1175-
Abstract
A series of four cobaltbased catalysts two of which promoted with ruthenium supported on SiO2 or SBA15 were prepared and tested in the Fischer–Tropsch synthesis at industrially relevant process conditions 483 K 20 bar H2/CO ratio = 21 pellet size 53–90 μm The catalysts were characterized by N2adsorption Xray diffraction XRD temperatureprogrammed reduction TPR H2chemisorption and transmission electron microscopy TEM Ru as promoter enhanced the activity but not the selectivity to longchain hydrocarbons textS textC 5+ The textS textC 5+ values of the SBAsupported catalysts were very low especially at low conversion levels ie low water partial pressure suggesting that CO diffusion limitation increased the H2/CO ratio inside the 1dimensional 1D porous network A superimposition of the selectivity results on the correlations found in our recent study derived for Cobased catalysts supported on γAl2O3 αAl2O3 and TiO2 free from diffusion limitations was made While the SiO2supported catalysts with a 3D porous structure followed the correlations the SBAcatalysts deviated significantly at low conversions giving a further indication that the selectivity results of these catalysts were affected by CO diffusion limitations Hence it may be concluded that the kinetically significant diffusion distances ie those long enough to cause an intrapore H2/CO ratio higher than that of the bulk gas phase are probably much shorter for 1D porous networks than for conventional 3D supports This is explained by a significantly lower effective diffusivity in 1D porous networks The potential of using the correlations between nonASF distributed hydrocarbons and C5+ to give insight on the occurrence of diffusion limitations was confirmed by superimposing data from the literature that were anticipated to be influenced by CO diffusion limitationsThe authors acknowledge the financial support provided by the Swedish Energy Agency SGC Svenskt Gastekniskt Center COST action D36 is acknowledged for short term scientific mission grant Gabriella Di Carlo Sept–Dec 2009 John Walmsley SINTEF Materials and Chemistry Trondheim is gratefully acknowledged for the TEM pictures
Keywords:
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- Investigation of the Impact of Calcium, Zinc and Phosphorus on DeNO x Activity of a Commercial SCR Catalyst
- Acrylonitrile from Biomass: Still Far from Being a Sustainable Process
- Gold Nanoparticles on Yttrium Modified Titania: Support Properties and Catalytic Activity
- Characterization and Activity of Pd–Ir Catalysts in CO and C 3 H 6 Oxidation Under Stoichiometric Conditions
- Nano Design of Alumina Supported Monometallic Catalysts: A Promising Way to Improve the Selective Hydrogenation of Poly-Unsaturated Hydrocarbons
- Selective Nanocatalysis of Organic Transformation by Metals: Concepts, Model Systems, and Instruments
- New Insights on Kinetic Versus Thermodynamic Ratios in Catalyzed Alkene Isomerization
- Insights into the Reactivity of Thiophene: Heterogeneous Alkylation
- Hydrogenation of the Aromatics and Olefins in FCC Gasoline During Deep Desulphurisation
- Effect of Ce Doping on the Performance and Stability of Strontium Cobalt Ferrite Perovskites as SOFC Anode Catalysts
- Synthesis and Photocatalytic Activity of Titania-Loaded Transition Metal-Modified MCM-41 Molecular Sieves
- Nanoscale Optimization and Statistical Modeling of Photoelectrochemical Water Splitting Efficiency of N-Doped TiO 2 Nanotubes
- Enhanced Stability of Fe 2 O 3 -Doped FeVO 4 /TiO 2 –WO 3 –SiO 2 SCR Catalysts
- Enhanced Stability of Fe 2 O 3 -Doped FeVO 4 /TiO 2 –WO 3 –SiO 2 SCR Catalysts
- The 16th International Symposium on Relations Between Homogeneous and Heterogeneous Catalysis (ISHHC-16), Sapporo, August 4–9, 2013
- The Catalyst Selectivity Index (CSI): A Framework and Metric to Assess the Impact of Catalyst Efficiency Enhancements upon Energy and CO 2 Footprints
- Optimum Performance of Vanadyl Pyrophosphate Catalysts
- Deactivation of Diesel Oxidation Catalysts by Sulphur in Laboratory and Engine-Bench Scale Aging
- Fe-ZSM-5 Catalyst Prepared by Ion Exchange from Fe(acac) 3 : Application into NH 3 -SCR of NO
- Ethanol Reforming Reactions Over Co and Cu Based Catalysts Obtained from LaCoCuO 3 Perovskite-Type Oxides
- Higher Alcohol Synthesis Using K-Doped CoRhMoS 2 /MWCNT Catalysts: Influence of Pelletization, Particle Size and Incorporation of Binders
- Selective Hydrogenation of 4-Nitrobenzaldehyde to 4-Aminobenzaldehyde by Colloidal RhCu Bimetallic Nanoparticles
- Etherification of 5-Hydroxymethylfurfural to a Biodiesel Component Over Ionic Liquid Modified Zeolites
- Investigation of the Effect of Accelerated Hydrothermal Aging on the Cu Sites in a Cu-BEA Catalyst for NH 3 -SCR Applications
- CO Dissociation at Vacancy Sites on Hägg Iron Carbide: Direct Versus Hydrogen-Assisted Routes Investigated with DFT
- Some Attempts in the Rational Design of Heterogeneous Catalysts Using Density Functional Theory Calculations
- Effect of Ag, Cu, and Au Incorporation on the Diesel Soot Oxidation Behavior of SiO 2 : Role of Metallic Ag
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- Engineered CNT Support for Selective Hydrogenation Reactions
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