Influence of toluene on the catalytic activity of NiPdCe catalyst for selective hydrogenation of 1,3-butadiene

► Conversion of BD increases with toluene addition. ► Conversion of BD increases with higher pressure. ► Toluene addition enhances 2BE/1BE selectivity and favors the trans-isomer. ► 1BE hydrogenation losses are reduced by toluene addition and pressure lowering.