4.1.3. Radial-flow spherical reactorSpherical reactor configuration has been investigated widely asa suitable alternative to conventional tubular reactors [135–138].This reactor setup has various advantageous respects to packedbed reactor such as lower pressure drop, smaller catalytic pelletswith higher effectiveness factor, and lower required material thickness[139]. This reactor configuration has been used in naphthareforming process in both axial-flow and radial-flow mode.A schematic diagram of the radial-flow spherical packed-bedreactor is shown in Fig. 9 [140,141]. This configuration consistsof two concentric sphere. The catalyst is charged in the space betweenthese spheres. The feed gas enters the reactor and flowsfrom the outside through the catalyst bed into the inner sphere.The radial-flow in the spherical reactor offers a larger meancross-sectional area and reduced distance of travel for flow comparedto traditional vertical columns.
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