Catalyst basket, annular

Spinning Basket Reactor Description. The spinning catalyst basket of the reactor is shown in Figure 1. The catalyst is held in place by wire mesh in an annular space inside the basket, where Internal baffles are between the catalyst space and the center support shaft. The basket is also surrounded by a baffle system which directs the fluid flow and prevents liquid vortexlng. A 500 cc autoclave designed and built by Autoclave Engineers serves as the basis for the reactor system and is equipped with a packless magnetic drive to rotate the basket. 

Reactor Development—Catalyst Basket. The reactor internals and flow scheme were designed at Amoco Oil Research and Development. Two types of spinning baskets were designed and built, the initial design used a cross-shaped paddle, while a later one adopted an annular shape. The latter improved design was used in all test work. 

The catalyst can, alternatively, be present in a basket located in the annular space at the wall. A reactor of this type is particularly useful for gas-liquid-solid reactions. 

E. Reactors with Catalyst Impregnated on Reactor Walls or Placed in an Annular Basket... 

A small modification of the above design, in which the catalyst in the form of granules or pellets is placed in an annular basket made of wire mesh fitted close to the reactor wall, has also been examined. The use of such an annular basket-type reactor has been reported by Tajbl et al. (1967), Relyea and Perlmutter (1968), and Lakshmanan and Rouleau (1970). The basic features of this reactor are the same as the ones described above. The reactor has been used to carry out high-pressure, high-temperature catalytic methanation of mixtures of carbon monoxide/hydrogen and carbon dioxide/hydrogen. 

Several reactors are presently used for studying gas-solid reactions. These reactors should, in principle, be useful for studying gas-liquid-solid catalytic reactions. The reactors are the ball-mill reactor (Fig. 5-10), a fluidized-bed reactor with an agitator (Fig. 5-11), a stirred reactor with catalyst impregnated on the reactor walls or placed in an annular basket (Fig. 5-12), a reactor with catalyst placed in a stationary cylindrical basket (Fig. 5-13), an internal recirculation reactor (Fig. 5-14), microreactors (Fig. 5-16), a single-pellet pulse reactor (Fig. 5-17), and a chromatographic-column pulse reactor (Fig. 5-18). The key features of these reactors are listed in Tables 5-3 through 5-9. The pertinent references for these reactors are listed at the end of the chapter. 

Figure S-12 Catalytic reactors.1 in) Reactor with catalyst lined or coated onto the reactor walk b reactor wilh catalyst placed in an annular basket...

Construclion difficulty and cost arc somewhat less than for Ihc rota ting-basket reactor if the catalyst is placed in an annular basket. A uniform and tightly-bound coating of the catalyst on the reactor may give some construction problems. 

The catalyst can be mounted either in an annular basket or in a paddle-basket arrangement as shown in Figure 3. The paddle basket replaces the radial impeller, which is used only with the annular basket. For either arrangement the propellers remain in place. The cylindrical wall and the top and bottom of the reactor each have four 1/8-in. wide baffles. The wall baffles extend along the total height of the stirred chamber the top and bottom baffles extend radially to the cylindrical wall. 

Catalyst temperatures are measured easily in the annular basket. Since the catalyst is stationary, a thermocouple is simply inserted in a hole drilled into the center of a catalyst pellet. 

Mass transfer was found not to control above about 750 r.p.m. at 615°F. with a 10.2% CO-31.2% H2 feed and with nickel catalyst in the annular basket. Of course, a check should be made for mass transfer at each run temperature. Because the rate constant increases with increas-... 

A spinning basket reactor has been developed for studying multiphase reactions at high pressure. Studies have been performed on the hydrodesulfurization of various petroleum fractions and a model sulfur compound. Hydrogen and liquid feed are continuously fed to the reactor and contacted with the catalyst which is held in a rotating annular basket. The... 

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