At one point during the operation of the process, the scrubber removes 90% of the SO₂ in the gas fed to it, and the combined stack gas contains 612.5 ppm (parts per million) SO₂ on a dry basis; that is, every million moles of dry stack gas contains 612.5 moles of SO2.
At one point during the operation of the process, the scrubber removes 90% of the SO₂ in the gas fed to it, and the combined stack gas contains 612.5 ppm (parts per million) SO₂ on a dry basis; that is, every million moles of dry stack gas contains 612.5 moles of SO2.
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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Transcribed Image Text:Question 2: A fuel oil is fed to a furnace and burned with 25% excess air. The oil contains 87.0 wt% C,
10.0% H, and 3.0% S. Analysis of the furnace exhaust gas shows only N2, O2, CO2, SO2, and H₂O. The sulfur
dioxide emission rate is to be controlled by passing the exhaust gas through a scrubber, in which most of
the SO₂ is absorbed in an alkaline solution. The gases leaving the scrubber (all of the N2, 02, and CO2, and
some of the H₂O and SO₂ entering the unit) pass out to a stack. The scrubber has a limited capacity,
however, so that a fraction of the furnace exhaust gas must be bypassed directly to the stack.
At one point during the operation of the process, the scrubber removes 90% of the SO₂ in the gas fed to
it, and the combined stack gas contains 612.5 ppm (parts per million) SO₂ on a dry basis; that is, every
million moles of dry stack gas contains 612.5 moles of SO2.
a) Draw a labeled flowchart of the process.
b) Calculate the fraction of the exhaust bypassing the scrubber at this moment.
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