Abstract:
CO hydrogenation on the cobalt catalyst with Titania support (Co/TiO2) without reduction condition and with a fixed-bed differential cylindrical reactor was kinetically studied. Internal and external mass transfer resistances of the porous catalyst are low and neglected in experimentations. Models have been developed using Langmuir-Hinshelwood-Hougen-Watson (LHHW) theory based on carbide and enolic mechanisms. Models have compared with experimental data according to Levenberg-Marquardt algorithm. The best model (-Rco = kPH2/ (1 + aPco) 2 ) is selected because of good agreement with experimental data. Absorption step and hydrogen dissociation on surface of the catalyst is considered as a rate determination, simultaneously.
Activation energy and enthalpy of the carbon monoxide consumption were obtained 82.3 kj/mol and the 57.9 kj/mol, respectively.
