5/30/2023 0 Comments Equation show cracking dodecaneThe bubbles are responsible for much of the mass transport of particles and are an important part of the mixing process. In the wake of these pockets is a stream of high-velocity particles. These are pockets of gas moving upward through the bed. In dense beds a ‘bubble phase’ is often seen. The particles move upwards in the center of the bed and fall downwards, under gravity, at the walls. In a fluidized bed, an upward current of gas suspends particles. These are of particular interest in the food and pharmaceutical industries. The gas is the monomer ethylene or propylene.įluid beds are frequently used to produce granules or to dry particulate materials. The particles consist of growing polyolefin granules (polyethylene or polypropylene). In the petrochemicals industry they are used for producing polyolefins on a very large scale. ![]() ![]() ![]() Belchamber, in Encyclopedia of Analytical Science (Second Edition), 2005 Fluid Bedsįluid bed technology is important in the oil, petrochemical, pharmaceutical, and food industries.Ĭatalytic cracking is an important process in the oil industry where petroleum vapor passes through a low-density bed of catalyst, which causes the heavier fractions to ‘crack’ producing lighter more valuable products.
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