Toluene reacts with H₂ to form benzene (B), but a side reaction occurs in which a by-product diphenyl (D) is formed:

The process is shown in Figure P12.20. Hydrogen is added to the gas recycle stream to make the ratio of H₂ to CH₄ 1 to 1 before the gas enters the mixer. The ratio of H₂ to toluene entering the reactor at G is 4H₂ to 1 toluene. The conversion of toluene to benzene on one pass through the reactor is 80%, and the conversion of toluene to by-product diphenyl is 8% on the same pass. Calculate the moles of R_G, and moles of R_L, per hour.

TolueneC7H8+hydrogenH2benzeneC6H6+methaneCH42C7H8+H2C12H10+2CH4dipheny