An air stream is contaminated with benzene, and your task is to remove the toxic benzene. An air-benzene mixture at 298 K and 1 bar contains 0.75 mol% benzene and is fed counter- currently at a rate of 5000 L/second to a moving stream of activated carbon. In this process, 85% of the benzene is to be removed. The entering activated carbon to the process contains 20 cm3 benzene vapor (at STP) per gram of carbon. 1. Calculate the minimum flowrate of entering carbon required to extract the specified benzene. 2. Now assume that you are operating with entering carbon of 5% above the minimum. 3. What is the exit concentration of benzene in the carbon? 4. Estimate the ideal number of stages for the conditions in (from question 2)
An air stream is contaminated with benzene, and your task is to remove the toxic benzene. An air-benzene mixture at 298 K and 1 bar contains 0.75 mol% benzene and is fed counter- currently at a rate of 5000 L/second to a moving stream of activated carbon. In this process, 85% of the benzene is to be removed. The entering activated carbon to the process contains 20 cm3 benzene vapor (at STP) per gram of carbon. 1. Calculate the minimum flowrate of entering carbon required to extract the specified benzene. 2. Now assume that you are operating with entering carbon of 5% above the minimum. 3. What is the exit concentration of benzene in the carbon? 4. Estimate the ideal number of stages for the conditions in (from question 2)
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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An air stream is contaminated with benzene, and your task is to remove the toxic benzene.
An air-benzene mixture at 298 K and 1 bar contains 0.75 mol% benzene and is fed counter-
currently at a rate of 5000 L/second to a moving stream of activated carbon. In this process, 85%
of the benzene is to be removed. The entering activated carbon to the process contains 20 cm3
benzene vapor (at STP) per gram of carbon.
1. Calculate the minimum flowrate of entering carbon required to extract the specified
benzene.
2. Now assume that you are operating with entering carbon of 5% above the minimum.
3. What is the exit concentration of benzene in the carbon?
4. Estimate the ideal number of stages for the conditions in (from question 2)
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