Copper/TEMPO-catalyzed continuous aerobic alcohol oxidation in a micro-packed bed reactor

Abstract

A micro-packed bed reactor has been developed to demonstrate aerobic oxidation of alcohols to aldehydes, utilizing green oxidant O2 and effective Cu/TEMPO-catalyzed system.

Electrodeposition of activated carbon on Ni foam for monolithic catalysts and intensification of hydrogenation performance in a micropacked bed

“…[12][13][14] In general, MPB is installed with small catalyst particles (diameter <500 μm) to manufacture microchannels and cavities. [15][16][17] However, the pressure drop is increased in the MPB with catalyst particles of such small size, resulting in high energy consumption. 18 Metal foam can be used for fabricating monolithic catalysts in the MPB with the advantages of large accessible porosity, high mechanical strength, and low pressure drop.…”

Efficient and continuous furfural hydrogenation to furfuryl alcohol in a micropacked bed reactor

“…[27][28][29] The intrinsic kinetics of the reaction can be determined quickly and accurately based on μPBRs. [30][31][32] In this work, the efficient and continuous conversion of FUR to FA in μPBRs was investigated based on the methods of molecular hydrogenation and catalytic transfer hydrogenation. Firstly, the performances of Cu-, Ni-, Pd-and Pt-based catalysts for FUR hydrogenation were screened at different temperatures to obtain suitable catalysts in μPBRs.…”

“…27–29 The intrinsic kinetics of the reaction can be determined quickly and accurately based on μPBRs. 30–32…”

Investigation of External Mass Transfer in a Micropacked Bed Reactor with a Pd/Al2O3/Nickel Foam

“…Recently, the superiority of micropacked bed reactors (μPBRs) for mass transfer enhancement has received much attention due to the small particle size ( d p < 500 μm) and reactor volume. − Typical mass transfer results of μPBRs showed that gas–liquid volumetric mass transfer coefficients and external volumetric mass transfer coefficients were 0.12–0.39 and 0.15–2.76 s –1 , respectively, which were higher than those of STRs and TBRs. , Also, μPBRs have several advantages of fast heat removal, catalyst immobilization, plug flows, and improved safety. − Owing to these features, μPBRs have been used in gas–liquid–solid and gas–liquid reactions, such as hydrogenations, − oxidations, , absorption of CO 2 , and wastewater treatments by ozonolysis. , The reduced dimension of reactors and particles can shift the dominant force of the fluid from the gravity to capillary force, resulting in a high pressure drop and energy consumption of μPBRs.…”