Real-world vanadium-based catalysts for the selective catalytic reduction (SCR) of NO with NH3 are occasionally exposed to high temperatures, which can induce catalyst aging. In this work, a 2.0 wt% V2O5/WO3-TiO2 catalyst based on commercial WO3-TiO2 was lab aged in dry and wet feed at different…
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An adsorption-based biogas cleaning system for deep desulfurization (<0.25 ppmv sulfur) was tested at pilot scale during a long-duration (1130 h) field demonstration. The goal was to protect a catalytic methanation reactor during direct methanation of biogas, where the biogas source was partly from a wastewater....
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The perovskite-type mixed oxide La0.3Sr0.55Ti0.95Ni0.05O3−δ (LSTN) is demonstrated to exhibit the remarkable property of structural regeneration, where Ni can be reversibly exsoluted from the host perovskite lattice resulting in a regenerable Ni catalyst for solid oxide fuel cell anode applications. Results of catalytic tests for the…
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Co-impregnation of vanadia and tungsta on titania produced highly active catalysts for the reduction of nitrogen oxides with ammonia but showed aging tendencies at temperatures around 600°C. In order to preserve their low temperature activity after hydrothermal aging up to 650°C, the catalysts were…
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Abstract Lignin oxidation offers a potential sustainable pathway to oxygenated aromatic molecules. However, current methods that use real lignin tend to have low selectivity and a yield that is limited by lignin degradation during its extraction. We developed stoichiometric and catalytic oxidation methods…
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H-ZSM-5 zeolite has been shown to be an active catalyst for the synthesis of polyoxymethylene dimethyl ethers (OME). However, we demonstrated – by passivation of the zeolite’s external surface – that the reaction rate is limited due to severe internal diffusion limitations of the reactants and products. External acid sites…
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