STRONG MOLECULAR INTERACTION OF CARBON-DIOXIDE WITH PD LAALO3 CATALYST/

The interaction of CO2 with an industrially manufactured Pd/LaAlO3 cat alyst and three supports, Al2O3, LaAlO3 and La2O3-Al2O3, was studied b y using the temperature-programmed desorption (TPD), transient reactio n and temperature-programmed reaction methods. The TPD experiments rev eal that molecular CO2 strongly adsorbs on Pd/LaAlO3 at 300 K. Therefo re, the kinetics of the CO-O-2 reaction must account for the adsorptio n/desorption of CO2 on Pd/LaAlO3. The LaAlO3 support of this catalyst offers the adsorption sites for CO2. The interaction of CO2 with pure Al2O3, LaAlO3 and La2O3-Al2O3 supports is also strong.