Three-Phase Reactors with a Plug Flow

2 THREE-PHASE REACTORS WITH A PLUG FLOW 

FIGURE 6.16 A volume element in a gas-liquid column reactor. 

After inserting A Ml, = nu,out — nujn sind AA = avAAVR(ay = gas-liquid surface area-to-reactor volume) and recalling the definition of Op (particle area-to-reactor volume) as in Equation 6.8, Equation 6.16 is transformed to 

Dividing Equation 6.17 by AVr and allowing AVr 0, the mass balance attains the form 

For a volume element AVg in the gas phase, analogous to Equation 6.16, we obtain the mass balance 

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