Development of microchannel reactors using polysilane-supported palladium catalytic systems in capillaries

Abstract

A new method of immobilizing Pd catalysts on the channel wall of a capillary by using polysilane with metal oxide has been developed, and applied to hydrogenation reactions.

Novel synthesis of thick wall coatings of titania supported Bi poisoned Pd catalysts and application in selective hydrogenation of acetylene alcohols in capillary microreactors

“…23,29 Another derivative of the dip-coating method, the fill-and-dry method, can be used to obtain [10][11][12][13][14][15][16][17][18][19][20] μm thick catalytic coatings inside short reactors. [30][31][32] However, the essential component of these methods, solvent evaporation, requires years to remove solvent from a longer (5 m) reactor according to estimations performed using Stefan's equation, 33 Fig. 1.…”

Scale up study of capillary microreactors in solvent-free semihydrogenation of 2‐methyl‐3‐butyn‐2‐ol

“…Also the reactant to catalyst ratio is much lower compared to other reactor types in order to provide good catalyst distribution and high conversion. The wall coated capillary reactors combine simplicity of operation and high throughput with excellent reaction control which lead to high selectivity towards intermediate products [33,34,46]. Their synthesis methods have been considerably improved over the last decade and very stable catalytic coatings were obtained for a range of industrial applications following a recently developed synthesis method [33].…”

Solvent-free semihydrogenation of acetylene alcohols in a capillary reactor coated with a Pd–Bi/TiO 2 catalyst

“…In addition, high-performance capillary reactors require high catalyst loading, long reactor channels and thick porous catalytic coatings [6,39]. To the best of our knowledge, capillary reactors reported in the literature for semihydrogenation reactions have a throughput below 5 g of alkynol a day and suffer from solvent overuse [6,39,41,[45][46][47]. In order to address these problems, we have studied a solvent free semihydrogenation of MBY in a capillary reactor coated with a titania supported Pd-Bi catalyst.…”