Fluidized bed reactors for paraffins dehydrogenation

Catalytic dehydrogenation of alkanes on Pt/Na-[Fe]ZSM5 and staged O2 introduction for selective H2 removal

“…Several alkane dehydrogenation processes [2][3][4][5][6] use supported Cr oxide catalysts. Recently developed dehydrogenation processes are based on supported Pt catalysts [2][3][4][5][6].…”

“…Several alkane dehydrogenation processes [2][3][4][5][6] use supported Cr oxide catalysts. Recently developed dehydrogenation processes are based on supported Pt catalysts [2][3][4][5][6]. Both Pt and Cr catalysts deactivate rapidly and require frequent oxidative regenerations, which increase process complexity and capital and operating costs.…”

Modeling of fluidized bed reactors with two reaction zones

“…Catalyst circulation through the bed allows the separation of the bed into two different reaction zones (that is, two different atmospheres) in the same reactor vessel by feeding the reactants separately at different bed points, while at the same time the catalyst will continuously move between both zones. 1,2 This provides an opportunity to upgrade some catalytic processes where the catalyst properties tion (FBD-3), 3,4 where two connected fluidized bed reactors are used. Another problem associated with industrial dehydrogenation reactors is how to supply the huge quantity of heat needed by the reaction while maintaining a careful control of the temperature in order to minimize the formation of other products (cracking) and maximize the yield to the desired product.…”

The modification of ferroelectric LiNbO3(0001) surfaces using chromium oxide thin films

“…17 Recent experimental work, however, found no evidence that CO adsorption on Pd supported on LiNbO 3 could be influenced by ferroelectric polarization. Chromium oxide-based catalysts have been well-studied and are catalytically active for a variety of reactions; industrial applications of these catalysts include ethylene polymerization, [22][23][24] alkane dehydrogenation, 25 and the selective oxidation of alcohols. 18 As a result, it was concluded that the Pd surface was too far from the LiNbO 3 surface to be influenced by its polarization.…”