Benzaldehyde is produced from toluene in the catalytic reaction: C6H5CH3 + O2 -> C6H5CHO + H2O...

Benzaldehyde is produced from toluene in the catalytic reaction:

C6H5CH3 + O2 -> C6H5CHO + H2O (1)

C6H5CH3 + 9O2 -> 7CO2 + 4H2O (2)

Dry air and toluene vapor are mixed and fed to the reactor at 350F and 1 atm . Air is supplied in 100% excess. Of the toluene fed to the reactor, 13% reacts to form benzaldehyde and 0.5% reacts with O2 to produce CO2 and H2O. The product gases leave the reactor at 379F and 1 atm. Water is circulated through a jacket surrounding the reactor entering at 80F and leaving at 105F. Over a four hour period, 23.2 lbm of water is condensed from the product gases. Assume complete condensation. The heat capacity of both toluene and benzaldehyde vapors is 31 Btu/lb-moleF, and that of liquid benzaldehyde is 46 Btu/lb-moleF. The standard heat of formation of of benzaldehyde vapor is -17,200 Btu/lb-mole.

a. Calculate the volumetric flow rates (ft^3/hr) of the combined feed stream to the reactor and product gas.

b. Calculate the required rate of heat transfer from the reactor and the flow rate of cooling water (kg/min).

Expert Solution

Amanda K answered 2 years ago

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