Abstract
Hydrodeoxygenation (HDO) of 2-acetylfuran (2-AF) was examined at 473 K and 33 bar over carbon-supported, bimetallic catalysts. Monodispersed, Pt-based (PtNi, PtCo, and PtCu) and Ni-based (NiCu) nanocrystals (NCs) with well-defined sizes and compositions were prepared via colloidal synthesis. Steady-state, flow-reactor measurements demonstrate that selectivities for HDO reaction to 2-ethylfuran (2-EF) are strongly dependent on the alloy compositions. The HDO of 2-AF is shown to be sequential, where 2-EF can react further to form over-hydrogenated products. The NiCu3/C nanocatalyst was superior to the other bimetallics; with the optimal residence time, it achieved a selectivity of 75 % 2-EF with 80 % conversion of 2-AF, with good stability for up to at least five hours time-on-stream. Deactivation due to coking became an issue when the NCs were deposited on oxide supports with weak acidity (SiO2 and γ-Al2O3). This work provides insights into which bimetallic catalytic systems might be useful for HDO of 2-AF reaction.
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