A completely mixed flow reactor (CMFR) has an influent flowrate of 100 gal/min (380 L/min) and contains a reactive contaminant with concentration of 150 mg/L. The contaminant destruction reaction is first order with a rate constant of 0.40 hr-1. (a) Determine the detention time and the volume of reactor needed for the effluent to contain only 20 mg/L of contaminant. Express the volume as gallons and liters.(b) Create a plot of the percent contaminant destroyed versus detention time. (c) How many times larger must a CMFR be versus a PFR to achieve 80% contaminant destruction

3 1/4 %

explanation:

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2

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