Answered: A petrochemical plant in Island C…

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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A petrochemical plant in Island C produces formaldehyde (CH2O) industrially by the

catalytic oxidation of methanol (CH3OH). The following is the chemical reaction:

CH3OH + ½O2 → CH2O + H2O --- (1)

Unfortunately, a significant portion of the formaldehyde will react with oxygen to produce CO

and H2O. The following is the side reaction:

CH2O + ½O2 → CO + H2O --- (2)

Assume twice the stoichiometric amount of air needed for oxidation (all chemical reactions) is

fed to the reactor. The conversion of methanol is 90% in the reactor. The outlet stream of the

reactor was analysed and found to be 150 kg/hr of formaldehyde, 30 kg/hr of CO and other

components.(i) Determine the mass flowrate (kg/hr) of Stream A. (ii) Determine the molar flowrate (kg-moles/hr) of Stream B (iii) Determine the mass flowrate (kg/hr) of water in the outlet stream.

Stream A
(Methanol only)
Outlet
Reactor
Stream
Stream B
(Air only)

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