Deactivation kinetic modelling for integral and differential fixed bed data according to LHHW mechanism is carried out. When differential fixed bed data are analyzed, a simplified method of parameter calculation, which is not allowed in integral data analysis, can be applied and the result of both methods, differential and integral, are compared. Cyclohexanol dehydration over a silica-alumina commercial catalyst is the system under study, at three temperatures, 533, 548 and 573 K. Final kinetic equation for deactivation rate deduced is: -da/da=kd(A) . K-A(3) . P-A(3)+kd(B) . K-B(3) . P-B(3)/(1+K-A . P-A+K-B . P-B+K-W . P-W)(3) . a(2) Despite integral method application being more complex than that of differential method, the experimental error has a much lower influence in the former, and integral method yields much better results than differential method.