Affiliation:
1. Institute of Chemical and Electrochemical Process Engineering Clausthal University of Technology Leibnizstraße 17 38678 Clausthal-Zellerfeld Germany
2. Institute of Particle Technology Clausthal University of Technology Leibnizstraße 19 38678 Clausthal-Zellerfeld Germany
3. School of Engineering Brown University 184 Hope Street, Providence 02912 Rhode Island USA
4. Institute of Solid State Physics University of Bremen Otto-Hahn-Allee 1 28359 Bremen Germany
5. Institute of Chemical Process Engineering Karlsruhe Institute of Technology Kaiserstraße 12 76131 Karlsruhe Germany
Abstract
AbstractDry reforming of methane (DRM) is an attractive reaction for synthesis gas production, since it converts two greenhouse gases into valuable chemical feedstock. Silica supported bimetallic catalysts with constant metal loading but varying Ni/Co ratios (xNi=1, 0.8, 0.6, 0.5, 0.4, 0.2, 0) were produced via spray‐drying for the application in DRM, aiming at the identification of compositions with superior activity. In this study, building block particles refer to an inert framework, supporting the catalyst. The elemental distribution of Si, Ni, and Co within such building block particles was evaluated using scanning transmission electron microscopy. Additionally, X‐ray diffraction and temperature‐programmed reduction experiments confirmed that Ni and Co initially exist in an oxidic state within the SiO2 framework after production and later transform into an alloyed metallic state upon reduction with hydrogen, as confirmed by X‐ray photoelectron spectroscopy. A systematic comparison of the activity over a temperature range (323–1150 K) was performed using temperature scanning measurements. The highest intrinsic activity was found with the bimetallic Ni40Co60 particles.
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1. Methane dry reforming: A catalyst challenge awaits;Journal of Industrial and Engineering Chemistry;2024-06