The as-synthesized [Pd(2-pymo)2]n powder was tested for its catalytic performance in the selective hydrogenation of acetylene under industrially relevant front-end conditions (Scheme 1 and Table ). The applied reactor setup for fixed-bed catalyst testing under continuous gas feed conditions and online product analysis was recently reported by Hock et al. For the experiments a typical feed composition of an acetylene removal unit (ARU) according to Gislason et al. consisting of 39.00 mol% ethylene, 35.24 mol% methane, 25.00 mol% hydrogen, 0.40 mol% acetylene, 0.33 mol% propane (internal standard) and 250 ppm carbon monoxide was used (Table #1). Scheme 1. Reaction scheme for the selective acetylene hydrogenation under industrial front-end conditions. Table . Feed composition of the reported experiments.