Selective oxidation reactions of hydrocarbons play an important role in today's society since the production of one quater of the most important industrial chemicals and intermediates used in the manufacture of industrial products is based on these reactions. They contribute significantly to the gross national products of industrial countries and they also present opportunities for significant fundamental research. The aim of this work was to study the catalytic oxidation of propene to acrolein in the fixed bed tubular reactor. Bismuth molybdate, which was used as a catalyst, was prepared using two different methods. Method of precipitation was used as an traditional method for catalyst preparation, , and the spray-drying method from the appropriate suspension or solution was used as a new method of preparation. The catalytic reaction was conducted at the atmospheric pressure, at constant ratio of propene and oxygen, at different total flow rates of the reaction mixture at the inlet of the reactor (40-160 cm^3 min^-1) and at different temperatures (350 - 450 °C). Research was carried out with the aim of connecting the physico- chemical properties of the catalyst occurred as result of applying appropriate methods of preparation, and catalytic properties, primary activity and selectivity. Kinetic models of the reaction and corresponding mathematical model were proposed to describe the fixed-bed reactor employed in this study. Conclusions about the acceptability of the proposed model were drawn out based on the comparison of experimental results and proposed model. Reactor model equations were solved using the numerical method of Runge Kutta IV, with simultaneous estimation of the model parameters. Analysis of kinetic results was conducted using modified differential method (ID). The root of mean square deviation (SD) was used as a criterion of correlation. . It was found out that under the reaction conditions employed in this work, some other products are formed, except of acrolein as desired reaction product, probably due to the subsequent oxidation of reaction intermediates. The overall conversion of propene increased with the increase of the reaction temperature, but the selectivity with respect to acrolein as the desired product simultaneously decreased. A good agreement between experimental results and the predicted model of the fixed-bed reactor has been observed, indicating its acceptability.