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One of the ways that benzene is produced on a large scale is the hydrodealkylation of toluene. C,H,CH, + H, C,H, + CH, 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 550 °C enter a condenser, where they are cooled to 41.0 °C. A vapor stream containing Y5CH, = 0.600 mol CH,/mol leaves the process, and a liquid stream containing x6b = 0.810 mol benzene/mol and x6 = 0.190 mol toluene/mol enters a distillation column. The distillate of the column leaves the process at n7 = 668.0 mol/h and contains y7b = 0.9000 mol benzene/mol and y7 = 0.1000 mol toluene/mol. The bottoms of the column contains x8b = 0.250 mol benzene/mol and xg = 0.750 mol toluene/mol and is recycled back to the fresh feed. Hydrogen is fed into the process at n¡ = 1183 mol H,/h. This process is carried out at 760 mmHg.

One of the ways that benzene is produced on a large scale is the hydrodealkylation of toluene. C,H,CH, + H, C,H, + CH, 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 550 °C enter a condenser, where they are cooled to 41.0 °C. A vapor stream containing Y5CH, = 0.600 mol CH,/mol leaves the process, and a liquid stream containing x6b = 0.810 mol benzene/mol and x6 = 0.190 mol toluene/mol enters a distillation column. The distillate of the column leaves the process at n7 = 668.0 mol/h and contains y7b = 0.9000 mol benzene/mol and y7 = 0.1000 mol toluene/mol. The bottoms of the column contains x8b = 0.250 mol benzene/mol and xg = 0.750 mol toluene/mol and is recycled back to the fresh feed. Hydrogen is fed into the process at n¡ = 1183 mol H,/h. This process is carried out at 760 mmHg.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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One of the ways that benzene is produced on a large scale is the hydrodealkylation of toluene. C,H,CH; + H, C,H, + CH4 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 550 °C enter a condenser, where they are cooled to 41.0 °C. A vapor stream containing Y5CH, = 0.600 mol CH,/mol leaves the process, and a liquid stream containing x66 = 0.810 mol benzene/mol and x6 = 0.190 mol toluene/mol enters a distillation column. The distillate of the column leaves the process at n7 = 668.0 mol/h and contains y7h = 0.9000 mol benzene/mol and y7 = 0.1000 mol toluene/mol. The bottoms of the column contains X8b = 0.250 mol benzene/mol and xgt = 0.750 mol toluene/mol and is recycled back to the fresh feed. Hydrogen is fed into the process at ni = 1183 mol H,/h. This process is carried out at 760 mmHg. A n, mol/h mol H/mol YSH2 YSCH, mol CH_/mol Ysh mol b/mol Ys mol t/mol n̟ mol/h n, mol/h Condenser Улн, тol H/mol Усн, тol CH/mol mol b/mol y, mol t/mol Y, mol b/mol Y, mol t/mol п mol H.h Distillation n, mol t/h n, mol/h Reactor n, mol/h column X, mol b/mol X, mol b/mol X, mol t/mol X, mol t/mol п, mol/h X, mol b/mol X mol t/mol What are ysb and yst, the mole fractions of benzene (b) and toluene (t), respectively, in the vapor stream leaving the condenser?
Transcribed Image Text:One of the ways that benzene is produced on a large scale is the hydrodealkylation of toluene. C,H,CH; + H, C,H, + CH4 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 550 °C enter a condenser, where they are cooled to 41.0 °C. A vapor stream containing Y5CH, = 0.600 mol CH,/mol leaves the process, and a liquid stream containing x66 = 0.810 mol benzene/mol and x6 = 0.190 mol toluene/mol enters a distillation column. The distillate of the column leaves the process at n7 = 668.0 mol/h and contains y7h = 0.9000 mol benzene/mol and y7 = 0.1000 mol toluene/mol. The bottoms of the column contains X8b = 0.250 mol benzene/mol and xgt = 0.750 mol toluene/mol and is recycled back to the fresh feed. Hydrogen is fed into the process at ni = 1183 mol H,/h. This process is carried out at 760 mmHg. A n, mol/h mol H/mol YSH2 YSCH, mol CH_/mol Ysh mol b/mol Ys mol t/mol n̟ mol/h n, mol/h Condenser Улн, тol H/mol Усн, тol CH/mol mol b/mol y, mol t/mol Y, mol b/mol Y, mol t/mol п mol H.h Distillation n, mol t/h n, mol/h Reactor n, mol/h column X, mol b/mol X, mol b/mol X, mol t/mol X, mol t/mol п, mol/h X, mol b/mol X mol t/mol What are ysb and yst, the mole fractions of benzene (b) and toluene (t), respectively, in the vapor stream leaving the condenser?
Y5h = mol b/mol y5t = mol t/mol What is n2, the flow rate of fresh toluene into the process? n2 = mol t/hr What is n8, the flow rate of the recycle stream? mol/hr = 8y What is the single pass percent conversion of toluene in the reactor? single pass percent conversion: %
Transcribed Image Text:Y5h = mol b/mol y5t = mol t/mol What is n2, the flow rate of fresh toluene into the process? n2 = mol t/hr What is n8, the flow rate of the recycle stream? mol/hr = 8y What is the single pass percent conversion of toluene in the reactor? single pass percent conversion: %
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