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In this work, the shaft furnace reactor of the MIDREX ® process is simulated. This is a counter current gas-solid reactor, which transforms iron ore pellets into sponge iron.Simultaneous mass and energy balance along the reactor leads to a set of ordinary differential equation with two points boundary conditions. The iron ore reduction kinetics was modelated with the unreacted shrinking core model. Solving the ODE system allows to know the concentration and temperature profiles of all species within the reactor.The model was able to satisfactorily reproduce the data of two MIDREX ® plants: Siderca (ARGENTINA) and Gilmore Steel Corporation (U.S.A.). Also, it was used to explore the performance of the reactor under different operating conditions. This capacity could be used for design and control purpose.

A kinetic study of ethanol steam reforming to produce hydrogen within the region of kinetic rate control was carried out. A Ni(II)-Al(III) lamellar double hydroxide as catalyst precursor was used. H 2 , CO, CO 2 and CH 4 were obtained as products. Using the Langmuir-Hinshelwood (L-H) approach, two kinetic models were proposed. The first was a general model including four reactions, two of them corresponding to ethanol steam reforming and the other two to methane steam reforming. When high temperatures and/or high water/ethanol feed ratios were used, the system could be reduced to two irreversible ethanol steam reforming reactions.