Glass capillaries with TiO 2 supported on inner wall as microchannel reactors

Photocatalytic Oxidation of VOCs in Gas Phase Using Capillary Microreactors with Commercial TiO2 (P25) Fillings

“…The incorporation of a benchmark TiO 2 sample such as P25 without treatment inside the fused silica capillaries was carried out by using a dispersion of the P25 in EtOH. This approach is a straightforward methodology to incorporate already synthesized catalysts compared to the methodology of synthesizing the catalyst inside the microreactor in packed-bed, monolithic or wall-coated configuration, which is the usual process reported in the literature [ 13 , 23 , 24 ].…”

“…At present, different types of microreactors are employed for heterogeneous catalysis, such as packed-bed, monolithic and wall-coated microreactors [ 22 ]. The former, composed by packed microparticles of a solid catalyst inside the microchannel, is very interesting for solid-liquid reactions, due to a highly improved micromixing performance compared with non-packed microchannels [ 23 ], and for catalytic reactions in gas phase since it assures a more efficient contact with the catalyst [ 24 ]. However, the packed-bed microreactor strategy presents as the main drawback the immobilization of the catalyst inside the capillary, since the synthesis in-situ of the catalyst filling is not straightforward and may require synthesis conditions which are not compatible with the microreactor materials.…”

Photo-microfluidic chip reactors for propene complete oxidation with TiO2 photocalyst using UV-LED light

“…This microreactor reached a total conversion of benzothiophene in 2.8 min and methyl orange in 40 s. [30] More recently Suhadolnik et al showed that the photoelectrocatalytic degradation in microreactors is very interesting due to a strong synergistic effect between the photocatalytic and electrocatalytic processes. [31,32] The most widely reported configuration reported in the literature for the microreactor is the wall-coated configuration and the reactions are performed in liguid phase.…”

“…[31,32] The most widely reported configuration reported in the literature for the microreactor is the wall-coated configuration and the reactions are performed in liguid phase. Another interesting configuration in the microreactors is the packed-bed configuration, due to the improvement of micro-mixing performance in the catalytic bed compared to wall-coated or other type of non-packed microchannels, moreover this configuration ensures a better contact of the reagent (liquid or gas) with the photocatalyst [33,34]. Nevertheless, this type of configuration has the immobilization of the catalyst inside the reactor as the main drawback.…”

Experimental study on the durability of the polydopamine functionalized gas–liquid–solid microreactor for nitrobenzene hydrogenation

“…5 Microreactors have an intrinsically large interfacial area per unit volume and have proven to be able to dramatically enhance heat and mass transfer as well as reduce the explosion potential, making them suitable for multiphase catalytic reactions. [6][7][8][9][10][11] To date, numerous studies have been carried out to investigate the microreactor technologies for various catalytic reactions, such as the catalytic oxidation, 12 the catalytic hydrogenation, 6 the catalytic combustion, 13 etc. It has been found that the property of the prepared catalyst layer inside the microreactor is crucial to affect the microreactor performance.…”