User Account

All Pages

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

Explain oxidation, Oxidation - Silicon has the unique ability to be oxidiz...

Oxidation - Silicon has the unique ability to be oxidized into silica, which produces a chemically stable, protective and insulating layer  on the surface of the wafer. The produc

Properties of an ideal electrical insulating material, What are properties ...

What are properties of an ideal electrical insulating material? The properties of an ideal (electrical) insulating material are given below:- (i)  Low dielectric court (high

Work is completed as the steam expands, Steam at 400C, 100 bar in an insula...

Steam at 400C, 100 bar in an insulated cylinder is rapidly decompressed to 10 bar, by unlocking the piston and permitting the gas to expand, with a constant external pressure of 10

Important properties of permanent magnetic material, What are the most imp...

What are the most important  properties of permanent magnetic materials? Explain.  The most important properties of permanent magnetic materials are  (i) Remanence (Residu

Explain ion implantation, Ion implantation equipment typically having of a...

Ion implantation equipment typically having of an ion source, where ions of the desired element are produced, an accelerator, where the ions are electrostatically accelerated to a

Problem Question Help, I am final year chemical engineering student working...

I am final year chemical engineering student working on a problem paper which has got two questions with a total of 5 parts. Would you be able to provide a solution for that?

Determine the maximum gain of the system, Consider a heat-exchanger control...

Consider a heat-exchanger control loop with no dead time.  It is controlled by a PD controller.  The rate time is 0.25 min.  A real PD controller is used with filtering where a = 0

Procedure-design and features of a laboratory, PROCEDURE : Visit any lab (...

PROCEDURE : Visit any lab (physics, chemistry or biology) of your study centre or any other you can get access to and note its features. To guide you through we have listed below

Process dynamics and control, heat exchanger would be difficult to model

heat exchanger would be difficult to model

What is the phase rule and what does it indicate, What is the phase rule an...

What is the phase rule and what does it indicate? Gibbs' phase rule is the fundamental rule on which phase diagrams are based. It gives the number of degrees of freedom for a g

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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