cheme hw, Chemical Engineering

Assignment Help:

Consider a process for the partial oxidation of benzene to produce maleic anhydride (C4H4O4) using air. There are two reactions to be concerned with: The first partially oxidizes the Benzene to produce maleic anhydride along with carbon dioxide and water.

The second, undesired reaction fully oxidizes the benzene. The process used is as follows:

1) Benzene Purification: The benzene flows into a pressurized still with water at 23.2

psia. The liquid in the still is 80% benzene by mass. Energy is supplied to keep the mixture at its boiling point (180°F) resulting in a vapor mixture of pure water (partial pressure = 7.52 psia) and pure benzene (partial pressure = 15.68 psia). The contaminates along with waste benzene flow out as a liquid.

2) Reaction: The vapor stream is mixed with enough air (T = 150°F, 1 atm, 50% relative humidity) to provide an 18/1 molar ratio of oxygen/benzene entering the reactor. At the exit to the reactor an analysis of the gasses (mole, dry basis) shows 0.76% C4H4O4, and 80.0% nitrogen.

3) Stripping: The exit gasses from the reactor flow into a water scrubber operating at 1 atm. Pure water enters the top of the column and the reactor outlet gas enters the bottom. The water "scrubs" out the maleic anhydride where it exits as a liquid at the bottom of the column with a concentration of (mole %) 12% C4H4O4, 88% water.

Exiting the top of the column as a gas are all of the unreacted benzene, oxygen, carbon dioxide, and nitrogen. This gas stream exits at 142°F saturated with water.

4) Drying: The liquid stream from the scrubber goes to a dryer where the water is driven off leaving pure maleic anhydride. What is (use pound moles):

a) The moles of benzene that are completely oxidized in the reactor per mole of benzene fed into the reactor? (i.e. the moles benzene used in the second reaction per mole fed)

b) The pounds of water leaving the dryer per mole of benzene fed into the reactor?

c) The composition of the gas leaving the scrubber (mole percent, wet basis)?

d) The pounds of water added to the top of the scrubber per mole of benzene fed into the reactor?

Related Discussions:- cheme hw

#titleHardness of Water, Ask question #Minimum 100 words accepted.hardness ...

Ask question #Minimum 100 words accepted.hardness of bore water is less than that of sea water-justify

Look, when do the cell get alot of thing in there thing because am confuse ...

when do the cell get alot of thing in there thing because am confuse cause is alot of thing becaus is crazy

Strength of materials, A double riveted double cover butt joint is used for...

A double riveted double cover butt joint is used for connecting plates 1.2 cm thick. The diameter of the rivets is 2.2 cm. The permissible stresses in tension - 100 N/mm2 The per

How many types of breakdown are possible in dielectrics, The following thre...

The following three types of breakdown are possible in Dielectrics: (a) Electrothermal Breakdown - This is caused by the heat produced because of the dielectric loss which is

Outdoor facilities-features of a laboratory, Outdoor facilities, if any ...

Outdoor facilities, if any For biology lab there may be an animal house, green house, garden plots, aquarium, a vivarium etc. Also find out how they are connected with the main

Applications of diffusion, Applications of Diffusion is of fundamental sig...

Applications of Diffusion is of fundamental significance in many disciplines of mechanical, electronics, chemistry, and biology. Some example applications of diffusion: Sin

Project report, how to write project report for chemical engineering

how to write project report for chemical engineering

Introduction-study of design and infrastructure , INTRODUCTION : This exer...

INTRODUCTION : This exercise is based on here of this course where you were introduced to For Mode-1 Students the essential features of a good preparation room that offers service

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd