KINETICS OF BUTA-1,3-DIENE HYDROGENATION OVER PALLADIUM CATALYSTS

The gas-phase hydrogenation of buta-1,3-diene to but-1-ene, trans and ciu-but-2-ene and butane over several monometallic Pd and bimetallic P d-Pb catalysts was studied, The reaction was investigated at atmospher ic pressure and 0-20 degrees C over a wide range of conversions. Selec tivity and stereoselectivity towards reaction products was constant up to high conversions, when (around 85% conversion) selectivity in but- l-ene decreased dramatically. The reaction mechanism was advanced, whi ch also took into account deactivation phenomenon. The parameters of t he kinetic model were estimated through statistical data fitting. Kine tic model provides fairly good decription of selectivity in the whole range of conversions. The values of estimated parameters are presented and discussed.