Alternative Reaction Engineering Concepts in Partial Oxidations on Oxidic Catalysts

Analysis of a fluidized bed membrane reactor for butane partial oxidation to maleic anhydride: 2D modelling

“…Therefore, FBR must work at low butane inlet concentration due to flammability risk when mixed with oxygen at the entrance of the reactor. However, the FBMR can work at higher butane inlet concentrations, as the mixture of butane and the air permeated through the membrane takes place inside the solid bed, which can avoid the propagation of flames (Lintz and Reitzmann, 2007). This together with the improved selectivity to maleic anhydride makes the FBMR an important alternative to this reaction.…”

“…It is also well known that for this and other reactions, selectivity and conversion are closely related, and characterized by a decrease in selectivity as conversion increases (Lintz and Reitzmann, 2007;Lorences et al, 2003;Mallada et al, 2000b). In order to properly compare the performance of FBR and FBMR, MA selectivity has been evaluated for each of the variables studied for the same conversion.…”

“…increasing the selectivity to maleic anhydride and the productivity of the process (which is low due to the low butane feed concentration, below the flammability limit), and improving the efficiency of removal of the heat of reaction. In this context, membrane reactors have been already considered for this process by different researchers (Coronas and Santamaría, 1999;Lintz and Reitzmann, 2007;Saracco et al, 1999).…”

Catalytic Vapor Phase Epoxidation of Propene with Nitrous Oxide as an Oxidant: Investigations on Catalyst Composition and Reaction Conditions

“…[33][34][35] The determination of selectivity parameters characterizing the catalyst as such, that is, independently of reactor configuration and residence time, is done preferably with simple reaction networks and rate laws. For this purpose, the complex reaction network presented in earlier works 25 was simplified to a triangular scheme of irreversible first order reactions, shown in Figure 1.…”

Selective oxidation of o-xylene to phthalic anhydride: from conventional catalysts and technologies toward innovative approaches

“…An alternative approach is the application of ceramic foams as catalyst supports; 27 they offer the advantage of an enhanced heat transfer, compared to packed beds made of pellets. 28,29 The open-pore structure and the high void fraction (up to 95%) of ceramic foams lead to a lower pressure drop and increase the heat transfer by radiation. Moreover, radial gas dispersion and higher gas turbulence increase the heat and mass transfer in the structure.…”