Anders Holmen
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View article: Dynamics of Co/Co2C redox cycle and their catalytic consequences in Fischer–Tropsch synthesis on cobalt–manganese catalysts
Dynamics of Co/Co2C redox cycle and their catalytic consequences in Fischer–Tropsch synthesis on cobalt–manganese catalysts Open
Fischer–Tropsch synthesis over CoMn oxides is a surface-catalyzed structure-sensitive reaction. Active site changes greatly alter product distribution. The dynamics and essence of the changes in Co species during the reaction have seldom b…
View article: Experimental and Theoretical Studies on Water-Added Thermal Processing of Model Biosyngas for Improving Hydrogen Production and Restraining Soot Formation
Experimental and Theoretical Studies on Water-Added Thermal Processing of Model Biosyngas for Improving Hydrogen Production and Restraining Soot Formation Open
The upgrading of biosyngas to convert methane into syngas is a necessary step for hydrogen production from biomass. However, this process is highly energy-demanding. In this study, a model biosyngas containing H2, CH4, CO, and CO2 were the…
View article: Kinetic insights into the effect of promoters on Co/Al2O3 for Fischer-Tropsch synthesis
Kinetic insights into the effect of promoters on Co/Al2O3 for Fischer-Tropsch synthesis Open
The fundamentals of promoter effects in the Fischer − Tropsch synthesis over Co-based catalysts were systematically investigated by employing the Rh, Ir, Sb and Ga as promoters of Co/Al2O3. Various characterizations showed the higher dispe…
View article: Nanostructural Analysis of Co‐Re/γ‐Al<sub>2</sub>O<sub>3</sub> Fischer‐Tropsch Catalyst by TEM and XRD
Nanostructural Analysis of Co‐Re/γ‐Al<sub>2</sub>O<sub>3</sub> Fischer‐Tropsch Catalyst by TEM and XRD Open
A rhenium promoted Fischer‐Tropsch (FT) cobalt catalyst supported on γ‐Al 2 O 3 has been investigated by Transmission Electron Microscopy (TEM) and X‐ray Diffraction (XRD), before and after reduction. Electron diffraction, High Resolution …
View article: Activation of Cobalt Foil Catalysts for CO Hydrogenation
Activation of Cobalt Foil Catalysts for CO Hydrogenation Open
CO hydrogenation has been studied on cobalt foils as model catalysts for Fischer–Tropsch (FT) synthesis. The effect of pretreatment (number of calcinations and different reduction times) for cobalt foil catalysts at 220 °C, 1 bar, and H2/C…
View article: Descriptor-Based Microkinetic Modeling and Catalyst Screening for CO Hydrogenation
Descriptor-Based Microkinetic Modeling and Catalyst Screening for CO Hydrogenation Open
CO hydrogenation is one of the most important and complex chemical reactions with various product distributions in which the product formation mechanism is not well understood yet, and the design of active and selective catalysts toward th…
View article: Promotional effects of sodium and sulfur on light olefins synthesis from syngas over iron-manganese catalyst
Promotional effects of sodium and sulfur on light olefins synthesis from syngas over iron-manganese catalyst Open
Fischer–Tropsch synthesis of light olefins plays a vital role in the production of major chemical building blocks from non-petroleum resources, having great academic and commercial importance. Herein, Na and S modulated FeMnOx catalysts wer…
View article: Transition-Metal Nanoparticle Catalysts Anchored on Carbon Supports via Short-Chain Alginate Linkers
Transition-Metal Nanoparticle Catalysts Anchored on Carbon Supports via Short-Chain Alginate Linkers Open
This study reports a green, inexpensive, and highly versatile procedure to synthesize well-dispersed transition-metal nanoparticles anchored on carbon supports. The resulting metal loadings are 26 wt % or above. Achieving both these proper…
View article: Water–Gas Shift Activity of Pt Catalysts Prepared by Different Methods
Water–Gas Shift Activity of Pt Catalysts Prepared by Different Methods Open
Platinum supported on ceria and zirconia was prepared through different preparation methods: Coprecipitation (CP), spray drying (SD), and flame spray pyrolysis (FSP). The catalysts were characterized by XRD, TPR, N2 adsorption, and H2 chem…
View article: Significance of C3 Olefin to Paraffin Ratio in Cobalt Fischer–Tropsch Synthesis
Significance of C3 Olefin to Paraffin Ratio in Cobalt Fischer–Tropsch Synthesis Open
The ratio between propene and propane (C3 o/p) during Fischer–Tropsch synthesis (FTS) has been analyzed based on both literature reports and experiments for five catalysts. The latter comprise four cobalt catalysts on γ-alumina with variat…
View article: Effects of Oxygen Mobility in La–Fe-Based Perovskites on the Catalytic Activity and Selectivity of Methane Oxidation
Effects of Oxygen Mobility in La–Fe-Based Perovskites on the Catalytic Activity and Selectivity of Methane Oxidation Open
The mechanism and structure requirements of selective and total oxidation of methane in a chemical looping process are both experimentally and theoretically examined on La1–xSrxFeO3−δ (x = 0, 0.2, and 0.5) and La0.5Sr0.5Fe1–xCoxO3−δ (x = 0…
View article: Investigation of C1 + C1 Coupling Reactions in Cobalt-Catalyzed Fischer-Tropsch Synthesis by a Combined DFT and Kinetic Isotope Study
Investigation of C1 + C1 Coupling Reactions in Cobalt-Catalyzed Fischer-Tropsch Synthesis by a Combined DFT and Kinetic Isotope Study Open
Understanding the chain growth mechanism is of vital importance for the development of catalysts with enhanced selectivity towards long-chain products in cobalt-catalyzed Fischer-Tropsch synthesis. Herein, we discriminate various C1 + C1 c…
View article: Influence of H2 on the Oxygen-Assisted Dehydrogenation of Ethane over Al2O3-supported Pt–Sn Catalysts
Influence of H2 on the Oxygen-Assisted Dehydrogenation of Ethane over Al2O3-supported Pt–Sn Catalysts Open
The oxygen-assisted dehydrogenation of ethane at 650 °C shows that adding Sn to the Pt catalyst results in increased conversion and selectivity to ethylene. Even the smallest amount of tin (0.16 wt%) has a significant effect. The addition …
View article: Perspectives on the Effect of Water in Cobalt Fischer–Tropsch Synthesis
Perspectives on the Effect of Water in Cobalt Fischer–Tropsch Synthesis Open
Water is an inherent component in Fischer–Tropsch synthesis on Co catalysts, and the effect of water is discussed with an emphasis on alumina and aluminates as support materials. Water may affect the selectivity, activity, deactivation, an…
View article: Evaluation of Reoxidation Thresholds for γ-Al<sub>2</sub>O<sub>3</sub>-Supported Cobalt Catalysts under Fischer–Tropsch Synthesis Conditions
Evaluation of Reoxidation Thresholds for γ-Al<sub>2</sub>O<sub>3</sub>-Supported Cobalt Catalysts under Fischer–Tropsch Synthesis Conditions Open
Size-dependent phenomena at the nanoscale influence many applications, notably in the science of heterogeneous catalysis. In cobalt-based Fischer-Tropsch synthesis (FTS), the size of Co nanoparticles (NPs) dictates to a high degree catalys…
View article: H2-TPR, XPS and TEM Study of the Reduction of Ru and Re promoted Co/γ-Al2O3, Co/TiO2 and Co/SiC Catalysts
H2-TPR, XPS and TEM Study of the Reduction of Ru and Re promoted Co/γ-Al2O3, Co/TiO2 and Co/SiC Catalysts Open
Effects of Ru and Re promoters on Co-CoOx catalysts supported on γ-Al2O3, TiO2 and SiC were investigated to improve the understanding of the role of promoters of the active phase of Co-CoOx-Ru and Co-CoOx-Re. The influence of promoter addi…
View article: Capturing metal-support interactions in situ during the reduction of a Re promoted Co/γ-Al<sub>2</sub>O<sub>3</sub> catalyst
Capturing metal-support interactions in situ during the reduction of a Re promoted Co/γ-Al<sub>2</sub>O<sub>3</sub> catalyst Open
The diffusion of Co2+ cations into the γ-Al2O3 support is probed during the reduction of a Re/Co/γ-Al2O3 catalyst by in situ by synchrotron X-ray powder diffraction resulting in the expansion of its crystal lattice.