Dehydrogenation Of Methylcyclohexane On The Industrial Catalyst: Kinetic Study.

An exclusive kinetic model for the methylcyclohexane dehydrogenation over alumina‐supported Pt catalysts

“…In support of the above findings, the literature reveals that Touzani et al, 13 Van Trimpont et al, 15 Chaouki et al, 17 Chai et al, 19 and Usman et al 9,26 followed the single‐site surface reaction mechanism in their work. When considering reaction intermediates in the reaction scheme, Touzani et al, 13 Van Trimpont et al, 15 Chaouki et al, 17 and Usman et al 9 found the elementary step “the loss of first molecular hydrogen” controls the rate of the deactivation reaction. Corma et al 33 and Garcia de la Banda et al 34 for the Pt/zeolite catalyst also observed the loss of first molecular hydrogen to be the rate‐determining step.…”

“…The toluene desorption was considered as the rate‐limiting step, and toluene was observed to inhibit the reaction. Touzani et al 13 used a bimetallic (Pt‐Sn/Al 2 O 3 ) catalyst and reported the kinetic mechanism and the rate equation similar to Sinfelt et al 11 . However, unlike Sinfelt et al, 11 the surface reaction of the adsorbed MCH was taken as the rate‐controlling step and no toluene inhibition was observed.…”

“…The kinetics of the MCH dehydrogenation reaction over Pt‐loaded alumina catalyst has been studied by a number of investigators 7‐9,10‐27 . The pioneering work was conducted by Sinfelt et al 11 who, for the dehydrogenation reaction, proposed a two‐step nonequilibrium adsorption reaction mechanism.…”

Associative Adsorption Kinetics: A Novel Kinetic Model for the Dehydrogenation of Methylcyclohexane

“…Taking into consideration the reaction intermediates, i.e. methylcyclohexene and methylcyclohexadiene, Touzani et al [14], Chaouki et al [16], Van Trimpont et al [15], Corma et al [13], García de la Banda et al [18], and Usman et al [9] have found the step loss of the first hydrogen molecule (to form methylcyclohexene from MCH) to be a suitable reaction step in fitting their respective experimental data. Moreover, Blakely and Somorjai [21] reasoned that, for the dehydrogenation reaction of cyclohexane to benzene on a platinum single-crystal surface, the loss of the first hydrogen molecule is the rate controlling step and Saeys et al [22] have come up with the same result while using DFT (density functional theory) for the cyclohexane dehydrogenation reaction over a Pt single crystal.…”

Dehydrogenation of Methylcyclohexane: Parametric Sensitivity of the Power Law Kinetics

“…For heterogeneous catalytic reactions, the empirical power law model is an important tool in providing the variation in the kinetic behavior to elaborate the insight of the kinetics of a reaction and therefore helps in guiding towards the development of an appropriate and robust kinetic model. Kinetics of the MCH dehydrogenation over supported Pt catalysts has been studied by a number of researchers [1,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. However, the variation in kinetic behavior and kinetic parameters (power law index, rate constant, and activation energy) of the dehydrogenation reaction with variation in operating conditions is rarely studied [19,22].…”