Abstract
Spatially resolved activity profiling along a fixed bed of powder catalyst during selective oxidation of propylene to acrolein revealed gradients in the gas phase composition and temperature, and thus the reaction network.
Highlights
Selective oxidation reactions are highly relevant in the chemical industry as they form the basis of numerous chemical production processes.[1,2] A prominent example is the oxidation of propylene to acrolein, which serves as an intermediate for e.g., acrylic acid and methionine.[3,4,5]From an industrial point of view, knowledge of reaction networks is essential to understand the processes taking place inside the reactor
The local gas phase composition and temperature were determined using a sampling capillary and mass spectrometry along a multicomponent Bi–Mo–Co–Fe oxide catalyst bed during selective oxidation of propylene to acrolein under high conversion conditions
While ca. 66% of the integral propylene conversion occurred in the first third of the catalyst bed with high selectivity towards acrolein, the latter third of the bed was dominated by the formation of acrylic acid and CO2 as further and total oxidation products, respectively
Summary
Selective oxidation reactions are highly relevant in the chemical industry as they form the basis of numerous chemical production processes.[1,2] A prominent example is the oxidation of propylene to acrolein, which serves as an intermediate for e.g., acrylic acid and methionine.[3,4,5]From an industrial point of view, knowledge of reaction networks is essential to understand the processes taking place inside the reactor. PAPER Jan-Dierk Grunwaldt et al Spatial activity profiling along a fixed bed of powder catalyst during selective oxidation of propylene to acrolein Spatial profiling of the reactant and product concentration including the gas phase temperature during the selective oxidation of propylene to acrolein along a catalyst bed allowed locating and distinguishing between specific processes occurring in each individual point of a chemical reactor.
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