Kinetic study of the selective catalytic hydrogenation of 1,3-butadiene in a mixture of n-butenes

The selective hydrogenation in liquid phase of 1,3-butadiene in the presence of n-butenes, over a commercial Pd/Al2O3 catalyst of the egg-shell type was studied.Experiments were carried out in a batch reactor at 44 °C. Initial concentration were in the range of 1%–2% of 1,3-butadiene, up to 10% of 1-butene, trans-2-butene and cis-2-butene. Partial hydrogen pressures (pH2pH2) were between 1 and 8 atm.Two kinetic models were proposed to fit the experimental data. Both models give an adequate representation of the experimental data.