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Pilot scale columns maldistribution

The packed hei t throng which a nonuniform profile persists is a function of column diameter (156). In pilot-scale columns, vapor maldistribution was found to posist for abed he t of the order of 1 ft (155,157). In large-diameter columns, this maldiattibution persists to a much greater hei t (15,152,154). In a number of 15-ft-diameter absorbers (154), vapor maldistribution persisted throu a 50-ft bed the efficiency was about balf that encountered during good vapor distribution. [Pg.550]

Practically all sources explain the increase of HETP with column diameter in terms of enhanced maldistribution or issues with the scale-up procedure. Lab-scale and pilot columns seldom operate at column-to-packing diameter ratios (DT/Dp) larger than 20 under these conditions, lateral mixing effectively offsets loss of efficiency due to maldistribution pinch. In contrast, industrial-scale columns usually operate at Dt/Dp ratios of 30 to 100 under these conditions, lateral mixing is far less effective for offsetting maldistribution pinch. [Pg.72]

See other pages where Pilot scale columns maldistribution is mentioned: [Pg.550]    [Pg.173]    [Pg.269]    [Pg.61]    [Pg.62]    [Pg.63]    [Pg.306]   
See also in sourсe #XX -- [ Pg.386 , Pg.537 , Pg.538 , Pg.539 , Pg.540 , Pg.541 , Pg.546 , Pg.551 , Pg.552 , Pg.553 , Pg.554 , Pg.555 ]

See also in sourсe #XX -- [ Pg.386 , Pg.537 , Pg.538 , Pg.539 , Pg.540 , Pg.541 , Pg.546 , Pg.551 , Pg.552 , Pg.553 , Pg.554 , Pg.555 ]



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