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16 results on '"Studt, Felix"'

2. Particle Size Effects of Carbon Supported Nickel Nanoparticles for High Pressure CO2 Methanation.

Author

Visser, Nienke L., Daoura, Oscar, Plessow, Philipp N., Smulders, Luc C. J., de Rijk, Jan Willem, Stewart, Joseph A., Vandegehuchte, Bart D., Studt, Felix, van der Hoeven, Jessi E. S., and de Jongh, Petra E.

Subjects
METHANATION, NICKEL, ACTIVATION energy, NANOPARTICLES, CATALYSIS, CATALYTIC activity
Abstract

Supported nickel nanoparticles are promising catalysts for the methanation of CO2. The role of nickel particle size on activity and selectivity in this reaction is a matter of debate. We present a study of metal particle size effects on catalytic stability, activity and selectivity, using nickel on graphitic carbon catalysts. Increasing the Ni particle size from 4 to 8 nm led to a higher catalytic activity, both per gram of nickel and normalized surface area. However, the apparent activation energy remained the same (∼105 kJ mol−1). Comparing experiments at atmospheric to 30 bar pressure demonstrates the importance of testing under industrially relevant pressures; the highest selectivity is obtained at high CO2 conversions and pressures. Finally, the selectivity was particle size‐dependent. The largest particles were not only most active but also most selective to methane. With this work we contribute to the ongoing debate about Ni particle size effects in CO2 methanation. [ABSTRACT FROM AUTHOR]

Published
2022
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3. Unravelling the Zn‐Cu Interaction during Activation of a Zn‐promoted Cu/MgO Model Methanol Catalyst

Author

Pandit, Lakshmi, primary, Boubnov, Alexey, additional, Behrendt, Gereon, additional, Mockenhaupt, Benjamin, additional, Chowdhury, Chandra, additional, Jelic, Jelena, additional, Hansen, Anna‐Lena, additional, Saraçi, Erisa, additional, Ras, Erik‐Jan, additional, Behrens, Malte, additional, Studt, Felix, additional, and Grunwaldt, Jan‐Dierk, additional

Published
2021
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10. Back Cover: The Mechanism of CO and CO2Hydrogenation to Methanol over Cu-Based Catalysts (ChemCatChem 7/2015)

Author

Studt, Felix, primary, Behrens, Malte, additional, Kunkes, Edward L., additional, Thomas, Nygil, additional, Zander, Stefan, additional, Tarasov, Andrey, additional, Schumann, Julia, additional, Frei, Elias, additional, Varley, Joel B., additional, Abild-Pedersen, Frank, additional, Nørskov, Jens K., additional, and Schlögl, Robert, additional

Published
2015
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11. The Mechanism of CO and CO2Hydrogenation to Methanol over Cu‐Based Catalysts

Author

Studt, Felix, primary, Behrens, Malte, additional, Kunkes, Edward L., additional, Thomas, Nygil, additional, Zander, Stefan, additional, Tarasov, Andrey, additional, Schumann, Julia, additional, Frei, Elias, additional, Varley, Joel B., additional, Abild‐Pedersen, Frank, additional, Nørskov, Jens K., additional, and Schlögl, Robert, additional

Published
2015
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16. The Mechanism of CO and CO2 Hydrogenation to Methanol over Cu-Based Catalysts.

Author

Studt, Felix, Behrens, Malte, Kunkes, Edward L., Thomas, Nygil, Zander, Stefan, Tarasov, Andrey, Schumann, Julia, Frei, Elias, Varley, Joel B., Abild‐Pedersen, Frank, Nørskov, Jens K., and Schlögl, Robert

Subjects
*CHEMICAL synthesis, *METHANOL, *HYDROGENATION, *CARBON monoxide, *CARBON dioxide, *COPPER catalysts, *CHEMICAL precursors, *ZINC oxide
Abstract

Methanol, an important chemical, fuel additive, and precursor for clean fuels, is produced by hydrogenation of carbon oxides over Cu-based catalysts. Despite the technological maturity of this process, the understanding of this apparently simple reaction is still incomplete with regard to the reaction mechanism and the active sites. Regarding the latter, recent progress has shown that stepped and ZnO x-decorated Cu surfaces are crucial for the performance of industrial catalysts. Herein, we integrate this insight with additional experiments into a full microkinetic description of methanol synthesis. In particular, we show how the presence or absence of the Zn promoter dramatically changes not only the activity, but unexpectedly the reaction mechanism itself. The Janus-faced character of Cu with two different sites for methanol synthesis, Zn-promoted and unpromoted, resolves the long-standing controversy regarding the Cu/Zn synergy and adds methanol synthesis to the few major industrial catalytic processes that are described on an atomic level. [ABSTRACT FROM AUTHOR]

Published
2015
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