Process Intensification – An Overview

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

“…Microreactors have many advantages over traditional large-scale chemical reactors: the small dimensions of microreactors facilitate mass-and heat-transfer, small reaction volume allows the handling of hazardous or expensive chemicals safely and high-pressure reactions to be carried out with inexpensive equipment, hence significant process intensification is possible with microreactor technology. [8][9][10][11][12][13][14] In heterogeneous catalytic reactions however, the advantages of microreactors are offset by the problem of catalyst introduction into the reactor. A convenient laboratory practice to use packed-bed reactors, i.e.…”

“…27 This method was applied to obtain a 5-20 μm thick coating inside shorter (0.3 m) reactors 28 or a thin coating (90 nm) inside 10-m long reactors. 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.…”

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

“…Because of intrinsic safety and excellent reaction control, microreactors can be utilised under reaction conditions that are prohibited for large-scale reactors. This opens new operational regimes which results in substantial process intensification [6][7][8]. An important societal advantage of safer microreactor processes is the synthesis on demand in smaller scale at the place where products are needed, the approach which decreases concentration of industrial units and reduces transportation costs [7].…”

Dynamical Particle Motions in Vortex Flows

“…A continuous oscillatory-baled reactor (OBR) proposed by Mackely and Ni [1], which irst appeared in 1991, is one of successful novel tubular reactors that ofers the prospect of a compact pluglow reactor with uniform, controllable mixing. The continuous OBR comprises tubes ited with equally spaced, low-constriction oriice plate bales having an oscillatory motion superimposed upon the net low of the process luid [2]. The combination of the bales and the oscillatory motion creates vortical low paterns conductive to eicient heat and mass transfer, whilst maintaining plug low.…”