KL Model for Intermediate-Size Particles

When intermediate-sized particles are used, the behavior of bubbles within the fluidized 

That is, the second term in equation 23.3-13 can be neglected, since transport is primarily by convection. 

The fractional conversion across the bed is given in terms of the fractions of reactant in the bubble and emulsion regions  

A first-order reaction, A - products, is conducted in a fluidized-bed reactor. Before fluidization, the bed is 1.8 m deep (Lpa), with a voidage (epa) of 0.42. The feed gas (P/ = 0.45 kgm-3 p,y = 4.2 x 10-5 Pa s) flows through the bed at a velocity three times the minimum fluidization velocity. The following data are also available  

the minimum fluidization velocity ( umj) is calculated from 23.2-5. After substitution of the particle and fluid properties provided, the resulting quadratic equation is  

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