J. Soler

MoO3/MgO as a catalyst in the oxidative dehydrogenation of n-butane in a two-zone fluidized bed reactor

Abstract Butadiene has been produced from butane by oxidative dehydrogenation on a MoO3/MgO catalyst using a two-zone fluidized bed reactor (TZFBR). The effect of the main TZFBR operating variables was studied, and its performance was compared with that of conventional fluidized beds and fixed bed reactors loaded with the same catalyst. These results have been compared with those obtained on a selective V2O5/MgO catalyst.

Oxidative dehydrogenation of n-butane on V/MgO catalysts. Influence of the type of contactor

A comparative study of the catalytic performance of a selective V-Mg-O catalyst in the oxidative dehydrogenation of n-butane is presented using three different types of reactor: (i) an adiabatic fixed-bed reactor; (ii) a fluidized-bed reactor; and (iii) an in situ redox fluidized-bed reactor. The results obtained indicate that the in situ redox fluidized-bed reactor outperforms the conventional fixed- and fluidized-bed reactors, especially at high n-butane conversions. Thus, a selectivity to C4 olefins of 54% at n-butane conversions of 60% was achieved at 550°C using an in situ redox fluidized-bed reactor while selectivities to C4-olefins lower than 43% were obtained on the other reactor types under the same reaction conditions (isoconversion and reaction temperature).

Modelling of a two-zone fluidised bed reactor for the oxidative dehydrogenation of n-butane

Abstract A reactor model is proposed as a means of representing an in situ redox fluidised bed reactor for the oxidative dehydrogenation of n -butane with a V–Mg–O catalyst. The model describes a reactor where the hydrocarbon is fed at some intermediate point and the catalyst oxidation and reduction occur in different zones within a fluidized bed. This model allows the behaviour of the reactor to be understood and the effect of operating parameters that cannot be determined by experiments to be predicted.

Catalytic dehydrogenation of n-butane in a fluidized bed reactor with separate coking and regeneration zones

The non-oxidative dehydrogenation of butane over a Cr2O3/Al2O3 catalyst has been studied in a fluidized-bed reactor with separate butane and oxygen feeds. Under suitable conditions, feed segregation allows the stable creation of separated reaction and catalyst regeneration (by coke burning) zones. The effect of the main operating variables (temperature, oxygen to hydrocarbon ratio, and relative velocity) in the process performance was studied.