Experimental studies and kinetic regularities of isobutane dehydrogenation over Ga2O3/Al2O3

Catalyst supports based on ZnO–ZnAl2O4 nanocomposites with enhanced selectivity and coking resistance in isobutane dehydrogenation

“…9b are typical for parallel-consecutive reactions, and were reported earlier for other systems. 35,36 However, in contrast to this work, deactivation was not observed for gallia/alumina catalysts and in the presence of chromia/alumina catalysts selectivity to isobutene only slightly decreased with isobutane conversion from 10 to 40%. 36 Selectivity to methane and propene was changing with isobutane conversion (Fig.…”

“…Although isobutane conversion does not reach equilibrium values ( ca. 52% at 550 °C), 35 it can be concluded that removal of hydrogen from the reaction mixture should promote the forward reaction and an increase in isobutane conversion.…”

Pt- and K-promoted supported gallia as a highly stable alternative catalyst for isobutane dehydrogenation

“…It should be mentioned that the reducibility of supported Ga 2 O 3 is controversial, as such a hypothesis is for example not supported by H 2 -TPR in ref. 8. This intriguing question requires a dedicated study, being, however, outside of the scope of the present work, which is focused on the synergy of Pt and K.…”

“…Among various oxides, gallium-containing materials are considered as very promising for dehydrogenation. 2 For example, our previous studies showed that the moderate activity of gallia dispersed on Al 2 O 3 in isobutane dehydrogenation 7,8 requires further improvement. Several studies on the promotion of gallia have shown that addition of Pt to Ga is beneficial for dehydrogenation of propane, 9-13 isobutane 9,12 and ethylbenzene.…”

“…Supported Ga 2 O 3 is in the β-modification, as shown in the XRD result of the sample with a high content of the active component (15 wt% Ga). 8 A list of the prepared catalysts and their experimental conditions is summarized in Table S3. † The experiments were carried out in a cyclic mode for at least sixteen or more successive dehydrogenation-regeneration cycles in fluidized-bed and fixed-bed reactors.…”