This paper describes a mathematical model for design and simulation of Fauser Montecatini reactors for methanol synthesis. The model considers the reaction of CO2 conversion, the phenomena of mass and heat transfer between the gas phase and the catalyst surface, and the diffusion of reactants and products within the catalyst pores. It has been used to prepare a computer simulation program to check operation of various industrial reactors. Agreement between experimental data and calculation results is generally very satisfactory.This paper describes a mathematical model for design and simulation calculations of Fauser-Montecatini reactors for the synthesis of methanol. A sketch of this type of reactor is reported in Figure 1. The kinetics of the reaction are CO + 2H2 CH3OH on ZnO-and Cr203-based catalysts and with pure reagents was determined by Xatta et al. (1953Xatta et al. ( , 1955, Cappelli and Dente (1965), using Montecatini-Edison catalyst having the following characteristics: Chemical composition ZnO Cr203 Real density Density of particle Specific surface Porosity <75 A 75-75,000 A >75,000 A Total porosity 75.3% 11.6% 5.36 g/cm3 2.35 g/cm3 70 m!/g 0.0602 cm3/g 0.1837 cm3/g 0.0014 cms/g 0.2453 cm3/gThe model also takes into consideration the reaction C02 + H2 ^CO + H20
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