Supercritical fluid reactor schematic

Figure 1. Schematic diagram of supercritical fluid reactor.

A simplified continuous supercritical fluid reactor is shown in a clear schematic in Fig. 12.5, such reactors are the basis for all the apparatus used for the heterogeneously catalyzed reactions of organic substrates described in this chapter. 

Figure 8. Schematic representation of our technique for recovering solid products from reactions in supercritical fluids (a) shows the supercritical reactor connected to a computer controlled syringe pump (Lee Scientific Model 501) filled with scC02. (b) shows how the scC02 is used to drive the supercritical reaction mixture (colored) through an expansion valve (Jasco 880/81 Back-pressure Regulator) where the products dissolved in the fluid are precipitated.

Figure 8 Schematic diagram of flow reactor for photochemical synthesis in supercritical fluids. (Reproduced by permission of Ref 108)...

Construction of Apparatus. The schematic of the apparatus for supercritical corrosion studies is shown in Figure 1. The important components include a type 396-89 Simplex Minipump which can accurately meter (between 46 and 460 ml/hr) a wide variety of solvents at pressures up to 6000 psi (about 400 atm) an EG G Model 362 Scanning Potentiostat the electrochemical cell an IBM PC computer with interface hardware for electrochemical potential and current, temperature, and pressure measurement and control and a 316 stainless steel reactor, which holds the supercritical fluid for the measurements. The alloy was selected for excellent corrosion resistance properties and relatively low cost when compared with other exotic alloys such as Hastelloy C. 

In SEE, instead of a liquid solvent a supercritical fluid is used for extracting specific compounds from a solid or liquid matrix. A simple schematic of this process by Reverchon [20] is shown in Eig. 13. In the left-hand side of each of the figures, the pressurized supercritical fluid is introduced into the reactor El Its pressure and temperature are chosen so as to dissolve as much of the desired compound as feasible. The pressure is quenched at the entrance to a vessel Se that receives the reaction product. The solvent expands and releases the solute, which collects at the bottom of the receptacle, while the gas is released from the top, repressurized and recirculated. 

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