Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

OP-I-8maximum CO 2 formation rate around 120°C.According to Weisz-Prater criterion, the kinetic experiments were carried out in kineticregime (calculated Weisz-Prater number of 0.019tabulated F-value, which makes the regression meaningful).Table 1. Apparent activation energy and statistical parameters for some the the checked models.Rate equation Ea (kJ/mol) SSR (10 –8 ) F value F ta brCO= kP · PCO O251.5 6.555 13.7 2.540kP ·Or2CO=2( 1 + KCO·PCO)54.8 63.914 10.8 2.540nkP ·CO·PO2rCO=n0.5· k · P + k · P61.2 6.547 13.8 2.386CO CO O2 O2ConclusionsAmong different rate equations, the best fit is for one derived from Mars-Van Krevelenmechanism, whose optimal parameters were found by genetic algorithm-based optimizationtechniques. In the best model the apparent activation energy of 61.2 kJ/mol and n (oxygenpartial pressure exponent) of 0.1 are obtained.References1. C. Zheng, S.P. Wang, S.R. Wang, S.M. Zhang, W.P. Huang, S. Wu, Catal. Commun. 5 (2004) 729.2. G. Sedmak, S. Hocevar, J. Levec, Topics in Catalysis 30/31 (2004) 445.3. A. Martinez-Arias, D. Gamarra, M. Fernandez, X.Q. Wang, J.C. Hanson, J.A. Rodriguez, J. Catal. 240(2006) 1.4. W. Liu, M. Flytzani-Stephanopoulos, J. Catal. 153 (1995) 304.41