A partial oxidation is carried out by bubbling air through a batch of liquid in a pressurized reactor 3 m indiameter and 5 m tall. The initial liquid level is 4.0 m, as shown by a manometer connected to the top andbottom of the reactor. During aeration the liquid level is expected to rise 10 to 20 percent, depending onthe air flow rate, but the manometer reading is found to be unchanged when the air is turned on. (a)Explain why the manometer reading does not change when the liquid is aerated. (b) Show that theinstallation of a second manometer, suitably located, would permit calculation of the height of the aeratedliquid. State what assumptions are involved.

The difference in pressure is measured by a manometer. A simple manometer is U-tube with a liquid.…

Answered: A partial oxidation is carried out by…

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 cleaning solution for a CIP in a heat exchanger for food production is made up by combining one part phosphoric/ glycolic acid concentrate with eight parts of water. a)food technician has 10 liters of the cleaning solution already prepared and needs to increase this to 25 liters. a. How many liters of acid concentrate and how many liters of water should be added to the existing 10 liters of cleaning solution to obtain 25 liters at the correct dilution? b)The acid concentrate is a 10% solution (ie, it is 90% water, 10% acid). What is the concentration of the diluted solution?
Give the final answer, please.
Mass transfer operations depend on molecules diffusing from one distinct phase to another and are based upon differences in the physico-chemical properties of the molecules, such as vapor pressure or solubility. Based on this background, illustrate any two mass transfer operations commonly used in process industries. justification
8 i. Estimate the dimensions of a drying chamber for a spray dryer that has an output of 1000 kg/h of a heat-sensitive biological material at 60oC containing 5% moisture and having a mean particle size of 100 micrometers. The feed contains 40% solids by weight in an aqueous solution at 4oC. The inlet air has a humidity of 0.01 kg/kg dry air and is at 150oC, while the outlet air is at 80oC.
A flexible artificial lung is used to study the inflation of the lungs. The device is pre-filled with 8g of air.To mimic physiological conditions, enough heat is then added to the device such that it’s temperature increases from 25 degrees Celsius to 37 degrees Celsius. a) What is the total work done by the air during this process? b)Prove that the amount of heat added is equal to the change in enthalpy of the air. c) How much heat was added during the process? d) what is the change in internal energy of the air ?
Forced air at T = 25°C and V = 10 m/s is used to cool electronic elements on a circuit board. One such ele- ment is a chip, 4 mm X 4 mm, located 120 mm from the leading edge of the board. Experiments have revealed that flow over the board is disturbed by the elements and that convection heat transfer is correlated by an expression of the form Nu,= 0.04 Re0.85 P.1/3 V. T uz bog fr dW ninin tol 1 = 4 mm Chip Board 0:00 Wira L= 120 mm Estimate the surface temperature of the chip if it is dis- sipating 30 mW.
The downcomer is placed inside the tray tower is to provide O a. A passage for the liquid to flow from top tray to bottom tray of the column O b. Lesser the contact between gas and liquid inside the column O C. A passage for the air to flow from top tray to bottom tray of the column O d. A passage for the liquid to flow from bottom tray to top tray of the column
Condensation of Steam on Vertical Tubes. Steam at 1 atm pressure abs and 100°C is condensing on a bank of five vertical tubes each 0.305 m high and having an OD of 25.4 mm. The tubes are arranged in a bundle spaced far enough apart so that they do not interfere with each other. The surface temper- ature of the tubes is 97.78°C. Calculate the average heat-transfer coefficient and the total kg condensate per hour. Ans. h = 15 240 W/m².K
Task 1. Answer only 3
An air pipe carries cool air at an inlet bulk temperature of 15C and a velocity of 12 m/s. The pipe is made of carbon steel of 0.25 m diameter, it is not insulated, and it( the pipe) will be maintained at temperature of 120C in order to raise the flowing air temperature to 45C. Calculate the Reynolds number, the heat transfer coefficient in W/(m^2K) and the lenght of this pipe in meters. Use Table A.4 to read the air properties.
Air enters a drying oven at a temperature of 40 m 3, 37 0 C and a pressure of 700 mmHg. This air water vapor partial pressure in it; It is 15 mmHg. As a result of the drying process, at a temperature of 20 0 C and 20 mmHg water vapor comes out air at partial pressure. The inlet and outlet air pressure is the same. a) The water vapor mass coming out of the drying oven, b) The volume of air leaving the drying oven, c) Calculate the mass of air entering and leaving the drying oven.

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