Analysis of Membrane Reactors for Integrated Coupling of Oxidative and Thermal Dehydrogenation of Propane

Abstract

This study presents strategies capable to intensify the thermal dehydrogenation of propane (TDH) using integrated reactor concepts. An inert packed bed membrane reactor for distributed dosing of oxygen to realize the oxidative dehydrogenation (ODH) was studied and compared to a reactor with catalytically active membrane. The latter concept allows to combine TDH and ODH in one apparatus to overcome the chemical equilibrium by in situ conversion of the by‐product H2 using O2 or in a reverse water‐gas shift reaction by CO2. If CO2 is used as active sweep gas the reactor offered better performance regarding yield and selectivity. Strategies for further thermal integration are discussed.

Reaction network analysis of the hydroaminomethylation of a long‐chain olefin in a thermomorphic solvent system: Mass transfer and kinetics

“…Model-based simulation studies of integrated membrane reactor concepts of various complexity for the oxidative dehydrogenation of propane to propene J. P. Walter 1) (E-Mail: jan.walter@ovgu.de), A. Brune 1,2) , Prof. A. Seidel-Morgenstern 1,3) , Prof. C. Hamel 1,2) 1) Otto-von-Guericke-University, Chemical Process Engineering, Universitä tsplatz 2, 39106 Magdeburg, Germany The role of oxidative propane dehydrogenation (ODH) is of interest as a promising alternative to the thermal propane dehydrogenation process (TDH) [1]. The major drawback of the TDH is a rapid catalyst coking, which can be repressed in the ODH because of the present oxygen.…”

“…2017, 89, 1159-1173. DOI: 10.1002 It has been shown that H 2 -to-O 2 ratios up to 2 are beneficial for the oxidation path of the H 2 O 2 direct synthesis using supported Pd-catalysts [1]. So far, a re-saturation setup has been studied, using continuous-flow catalysis to contact the reaction gases with the catalyst suspended in the liquid phase.…”

“…A concept study and computational results of the setup are presented to illustrate the improvement of the microstructured membrane reactor concept existing already. Reaction network analysis of the hydroaminomethylation of a long-chain olefin in a thermomorphic solvent system: Mass transfer and kinetics S. Kirschtowski 1) (E-Mail: sabine.kirschtowski@ovgu.de), W. Kortuz 1) , E. Alkan 1) , A. Seidel-Morgenstern 1,2) , C. The homogeneously rhodium-catalyzed hydroaminomethylation (HAM) tandem reaction, which couples hydroformylation (Hyfo) and reductive amination (RA), offers a direct and efficient pathway to aliphatic amines. To recover the expensive Rh-catalysts from the homogeneous reaction solution, thermomorphic solvent systems (TMS) are applied [1].…”

“…9, 1341-1368 the separation between products and catalysts can be realized exploiting temperature-dependent miscibility gaps in solvent mixtures of different polarity. Based on previous work of the sub-network of RA [1], a reaction network for the HAM could be postulated. For process development and optimization, the total reaction network and the reaction kinetics of the HAM were analyzed.…”

Synthesizing High‐Volume Chemicals from CO2 without Direct H2 Input

“…[181] To address the heat demand by alkane dehydrogenation, Brune et al proposed a hybrid system, in which endothermic dehydrogenation reactions and the exothermic O 2 -ODH reactions are conducted on different sides of a membrane, to make the overall process thermal-neutral. [182]…”