Contactor liquid distributor

Fnr stripping service, as in a glycol or amine contactor (see Chapt 7 a bubble cap trays are the most common. In recent years, there has b growing movement toward crimped sheet structured packing. Improved vapor and liquid distributor design in conjunction with struc-... 

For fast reactions, change in the flow regime has dramatic effects on performance. Prevent foaming. Liquid distributor design is very important. Carefully plan the liquid redistribution along the walls for columns < 2-3 m diameter. For these small columns place redistributors at distances = 8-10 times the column diameter. The critical surface tension of the solid packing should be greater than the surface tension of the liquid to ensure that the liquid film remains intact in a packed contactor. 

Westerterp et al. (W5) measured interfacial areas in mechanically agitated gas-liquid contactors. The existence of two regions was demonstrated At agitation rates below a certain minimum value, interfacial areas are unaffected by agitation and depend only on nominal gas velocity and the type of gas distributor, whereas at higher agitation rates, the interfacial areas are... 

Figure 4.14 Schematic of liquid/liquid micro distributors used as contactors in the reaction system [31],...

ElgozaU A, Linek, V, Eialova M, Wein O, Zahradnik J. (2002) Iirfluence of viscosity and surface tension on performance of gas-liquid contactors with ejector type gas distributor. Chem. Eng. Sci., 57 2987-2994. 

Zahradnik J, Kratochvil J, KaStdnek F, Rylek M. (1982) Hydrodynamic characteristics of gas-liquid beds in contactors with ejector type gas distributors. Collect. Czech. Chem. Communications, 47 1939-1949. 

The use of polymeric catalytic membranes in distributor/contactor-type reactors for hydrogenation or oxidation reactions has been widely described in several former and recent reviews. Mixed-matrix membranes of PDMS hlled with Pd particles, composite membranes of ionic liquid-polymer gels filled with Pd/C, ° ionic liquids containing rhodium complexes and supported in polystyrene sheets in a corrugated configuration, have been used for the selective gas-phase hydrogenation of hydrocarbons in contactor-type membrane reactors. 

Espro et al. reported the oxidation of propane to the corresponding oxygenated products (n-propanol, isopropanol, propionic aldehyde and acetone) mediated by the Fe " -H202 Fenton system in a distributor/ contactor-type membrane reactor, under mild conditions. A composite Nafion/PEEKWC (a modified polyetheretherketone) catalytic membrane separates the gas (propane/helium) and liquid (Fe -H202) phases. The flat and hollow fibre multi-tubular membrane reactor configurations were compared, being the best performances achieved with the hollow fibre multi-tubular configuration. 

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