One of the ways that benzene is produced on a large scale is the hydrodealkylati

Question

One of the ways that benzene is produced on a large scale is the hydrodealkylation of toluene.

A stream of toluene is mixed with a recycle stream and enters a reactor along with a stream of pure hydrogen. The reaction products at 530?C enter a condenser where they are cooled to 45.0?C. A vapor stream containing 0.570 mol CH4/mol leaves the process, and a liquid stream containing 0.720 mol benzene/mol and 0.280 mol toluene/mol enters a distillation column. The distillate of the column leaves the process at 686.0 mol/hr and contains 0.9000 mol benzene/mol and 0.1000 mol toluene/mol. The bottoms of the column contain 0.200 mol benzene/mol and 0.800 mol toluene/mol and is recycled back to the fresh feed. Hydrogen is fed into the process at 1311 mol H2/hr. This process is carried out at 760 mmHg.

1-What are y5b and y5t, the mole fractions of benzene (b) and toluene (t) respectively, in the vapor stream leaving the condenser?

2-What is n2, the flow rate of fresh toluene into the process?

3-What is n8, the flow rate of the recycle stream?

4-What is the single pass percent conversion of toluene in the reactor?

Explanation / Answer

you first need to write an equation for n6

n6(b)=686(b) +n8(b)

substitute to find n8...

than you need to look up in Perrys ChE handbook & find partial pressures for benzene & toluene.

from that you will get your moles of each through a simple equation.

as for n2 idk...

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