+1-415-315-9853

info@mywordsolution.com

## Engineering

 Civil Engineering Chemical Engineering Electrical & Electronics Mechanical Engineering Computer Engineering Engineering Mathematics MATLAB Other Engineering Digital Electronics Biochemical & Biotechnology

problem 1: A solvent is to be recovered from a solvent air mixture by scrubbing with water in the packed tower at a pressure of 101.3 kN/m2 and at temperature of 300K. The solvent vapour enters the tower at a rate of 0.1kg/s and consists of a concentration of 2% by volume. It is essential to recover 99.9% of the solvent; for the packing chosen the optimum gas and water flow rates are known to be 1.3 and 2.0 kg/m2s correspondingly. Compute the height and diameter of the tower. The data needed is as shown below:

Overall mass transfer coefficient Kya = 0.0389 kg/s m2(kN/m2)
Equilibrium data: Pe = 0.02 x; where Pe equilibrium pressure of the solvent kN/m2 and x the mole fraction of the solvent in water.

Molecular weight of the solvent and air are 70 and 29 kg/kmol, correspondingly. Find out other data in the book and make suppositions which make sense as it applies to respective problem.

problem 2: A sphere of naphthalene ball containing a radius of 10 mm is suspended in a big volume of still air at 318 K and 1 atm absolute pressure. The vapor pressure of naphthalene is 0.56 mm Hg at 318 K and the DAB of naphthalene in air at 318 K is 6.92×10-6 m2/s. Compute the rate of evaporation of naphthalene from the surface in k.moles/m2.s. Estimate the time needed for the diameter to reduce to 2 mm.

problem 3:

a) Under what conditions are the mass average velocity and molar average velocity of the components of a mixture equivalent?

b) Ammonia is defusing via an inert air film thick at a temperature of 200C and a pressure of 1 atm. The concentration of NH3 is 10 percent by volume on one side of the film and zero on the other side. Estimate the result on the rate of diffusion of raising the total pressure to 10 atm.

problem 4: Larson by using an Arnold cell measured the diffusivity of chloroform in air at 250C and 760 mmHg. The liquid density of chloroform at 250C is 1485 kg/m3 and its vapor pressure at 250C is 200mmHg. At time t = 0, the liquid chloroform surface was 74 cm from top of tube and after 10 hrs the liquid surface had dropped by 0.44cm. If the concentration of chloroform is zero at the top of the tube, what would be the gas diffusion coefficient of chloroform in air?

problem 5: Ammonia gas stream from a reactor comprises of 25% by volume of ammonia and 75% by volume of air. Pure water is utilized to absorb ammonia in an absorption packed tower at 300C and 1 atm. The total gas flow rate is 1000 k moles/hr. This is desired to decrease the concentration of ammonia to 2 % by volume in the outlet. Find out the minimum liquid rate? If 2.0 times the minimum liquid is employed, then what will be the number of transfer unit needed? Equilibrium relation is given as y*= 2.0 x, where y is mole fraction of ammonia in gas and x is mole fraction of ammonia in liquid. Compute the diameter of the tower.

Find out other data in the book and make suppositions that make sense as it applies to particular problem.

Chemical Engineering, Engineering

• Category:- Chemical Engineering
• Reference No.:- M96802

Have any Question?

## Related Questions in Chemical Engineering

### A horizontal 100-mm-diameter pipe passing hot oil is to be

A horizontal 100-mm-diameter pipe passing hot oil is to be used in the design of an industrial water heater. Based on a typical water draw rate, the velocity over the pipe is 0.5 m/s. The hot oil maintains the outer surf ...

### 100 moles of a fuel containing methane and butane is burned

100 moles of a fuel containing methane and butane is burned with 25% excess air in a furnace producing stack gas at 300 degrees C and 105 kPa. Determine the amount of 100 psi saturated steam that can be produced from wat ...

### A solar collector design consists of an inner tube enclosed

A solar collector design consists of an inner tube enclosed concentrically in an outer tube that is transparent to solar radiation. The tubes are thin walled with inner and outer diameters of 0.10 and 0.15 m, respectivel ...

### A 2-m3 tank initially contains a mixture of saturated-vapor

A 2-m3 tank initially contains a mixture of saturated-vapor steam and saturated-liquid water at 3000 kPa. Of the total mass, 10% is vapor. Saturated-liquid water is bled from the tank through a valve until the total mass ...

### A closed and sealed rigid tank contains 11 kg of liquid

A closed and sealed rigid tank contains 11 kg of liquid water at equilibrium with 1.17 kgof vapor at a pressure of 2 bar. The tank is equipped with two alarms: a pressure alarmthat will sound if the pressure exceeds 10 b ...

### According to experimental results for parallel airflow over

According to experimental results for parallel airflow over a uniform temperature, heated vertical plate, the effect of free convection on the heat transfer convection coefficient will be 5% when GrL/Re2L = 0.08. Conside ...

### A stream of ethylene gas at 52315 k 250degc and 3800 kpa

A stream of ethylene gas at 523.15 K (250°C) and 3800 kPa expands isentropically in a turbine to 120 kPa. Determine the temperature of the expanded gas and the work produced if the properties of ethylene are calculated b ...

### Because of shortage of copper it was decided to make the

Because of shortage of copper, it was decided to make the fuse in Example 7.4 out of iron (not a very good idea because of corrosion). If the same dimensions, including the width calculated in Example 7.4a are used and t ...

### A pesticide inhibits the activity of a particular enzyme

A pesticide inhibits the activity of a particular enzyme, which can therefore be used to assay for the presence of the pesticide in an unknown sample. a) In the laboratory, the initial rate data shown in the table below ...

### A horizontal 25-mm diameter cylinder is maintained at a

A horizontal, 25-mm diameter cylinder is maintained at a uniform surface temperature of 35°C. A fluid with a velocity of 0.05 m/s and temperature of 20°C is in cross flow over the cylinder. Determine whether heat transfe ...

• 13,132 Experts

## Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

### WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

### Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

### Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

### Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

### Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro