Single catalyst particle diagnostics in a microreactor for performing multiphase hydrogenation reactions

Abstract

Since inter- and intra-particle heterogeneities in catalyst particles are more the rule than exception, it is advantageous to perform high-throughput screening for the activity of single catalyst particles. A multiphase...

Continuous Solid Particle Flow in Microreactors for Efficient Chemical Conversion

“…Slurry catalysts have also been suspended in droplets of the reactant–solvent mixture in (micro)­flow, using an additional immiscible liquid carrier, for catalyzing liquid-phase or gas–liquid reactions. , Nieuwelink et al performed liquid-phase hydrogenation of methylene blue (MB) to Leuco-MB in a microreactor (Table , entry 12). The microreactor has three parallel channels separated by two 50 μm thick polydimethylsiloxane (PDMS) walls with high H 2 permeability.…”

“…However, this suspension state difference did not influence the liquid-phase reaction kinetics obtained, suggesting that for this slow reaction, a sufficient catalyst–reactant contact was still ensured by convection in droplets even in the case of partial homogenization (e.g., particles preferentially located in the bottom hemisphere of droplets; see Figure d). Though the primary focus of these two research reports is on high-throughput catalyst screening, , they provide important insights into solid flow manipulation toward efficiency increase in (gas−)­liquid–solid reactions under suspension catalysis in microreactors.…”

A Novel Bubble‐based Microreactor for Enhanced Mass Transfer Dynamics toward Efficient Electrocatalytic Nitrogen Reduction

“…Over the past decade, microfluidic technology has emerged as an advanced technology for enhancing mass transfer [ 28 ] based on the regulation of bubbles/droplets at the micron scale and has been widely employed in many fields, such as the pharmaceutical, [ 29 ] nanocrystalline, [ 30 ] and dye industries. [ 31 ] Benefiting from the homogeneous microdispersion of materials in the microchannels, a larger interfacial area and decreased mass transfer resistance can be simultaneously achieved, [ 32 ] which contribute significantly to a favorable mass transfer environment.…”