1. Structural and Catalytic Properties of Ag- and Co3O4-Impregnated Strontium Titanium Ferrite SrTi0.7Fe0.3O3−δ in Methanol Steam Reforming
- Author
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Bernhard Klötzer, Johannes Bernardi, Günther Kogler, Simon Penner, Kevin Ploner, Chen Zhuo, Ramona Thalinger, Thomas Götsch, and Qian Zhao
- Subjects
Materials science ,Hydrogen ,General Chemical Engineering ,Inorganic chemistry ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,Catalysis ,Steam reforming ,chemistry.chemical_compound ,chemistry ,Catalytic cycle ,Dehydrogenation ,Methanol ,0210 nano-technology ,Carbon monoxide ,Titanium - Abstract
The catalytic performance of Ag- and Co3O4-impregnated strontium titanium ferrite (SrTi0.7Fe0.3O3-δ, STF) has been assessed in methanol steam reforming as a test reaction and accordingly correlated with spectroscopic and structural characterization after each step of a catalytic cycle including pre-oxidation and pre-reduction. After pre-reduction in hydrogen at 400 °C, metallic silver and oxidized Co in the form of Co3O4 are present. As for catalysis, it was observed that both Ag and Co3O4 are strongly promoting the methanol chemistry with respect to pure STF already at low temperatures (230 °C for both materials). As a consequence, the selectivity towards carbon monoxide is strongly enhanced in comparison to pure STF. On Co3O4-STF, the catalytic profile is basically dominated by a temperature-dependent complex interplay between methanol steam reforming, methanol dehydrogenation and the water-gas shift equilibrium. The results also prove that despite the obvious inadequacy of H2-prereduced Ag-STF to act a...
- Published
- 2017
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