- Air with (μair = 2.27*10-5 pa.s, T = 394.3 K, M.wt of air = 28.97), flows through a packed bed of cylinders having a diameter of 0.03 m, and length the same as the diameter. The bed void fraction is 0.45 and the length of the packed bed is 4 m. The air enters the bed at 1.5 atm abs at the rate of 3.5 kg/m .s based on the empty cross section of the bed. Calculate the pressure drop of air in the bed.

The following data were obtained for the adsorption of n-butane on a porous solid (catalyst).  

If the area occupied by a n-butane molecule is 0.55 nm² at 85 °C, estimate the surface area of the catalyst (in m²/g) assuming Langmuir adsorption isotherm.

What is the purpose of using Hickman still instead of a conventional distillation apparatus in this synthetic experiment? Explain the advantages.

A liquid mixture of benzene and toluene is contained in a closed vessel at 60°C. The only other component in the system is nitrogen gas which is used to pressurize the system to 1 atm total pressure (absolute). The liquid is 70 mole% benzene and 30 mole% toluene, and the N₂ is considered non-condensable (i.e., the liquid mole fraction of nitrogen is zero). Consider the mixture to be ideal, and determine the vapor mole fractions of the three components. (Document any data that you use that is not given in the problem statement.)

Copper was determined in a river sample using spectrometry and the method of standard additions. For the addition, 100.0 μL of a 1000.0 ppm Cu standard was added to 100.0 mL of river water.

Absorbance of river water: 0.572

Absorbance of river water with standard: 1.122

Calculate the concentration of copper in the river water.

Please make sure to display your thought process? It is imperative to be able to follow how the answer was deduced. Please be as thorough as possible. Please address all parts of this question as they are all part and critical to answering this question correctly. Please show good integrity when answering the question:

1. Name 3 indirect methods to measure the miscibility of a polymer/polymer blend

2. Name 3 stress-strain responses to time-dependent deformation

3. Name 3 mechanical models used to calculate the viscoelasticity if polymer/polymer blends

4. Name 2 characteristics of interphases

5. Name 3 factors that affects the interphase concentration profile

6. Name 4 compatibilization methods for polymer blends g) What is dynamic vulcanization?

A membrane consists of a rigid disk of ? = 10 µm thick polycarbonate with 108 identical cylindrical pores, each with ? = 30 nm diameter. The pores pass through the entire membrane thickness normal to the membrane surface. Water (? = 1000 kg/m3 , ? = 10−3 Pa∙s) is forced through the membrane by applying a pressure of 10 atm (absolute) upstream, with 1 atm (absolute) pressure downstream. The pores are sufficiently spaced that flow through each pore is independent of that through all other pores. Furthermore, the pores are sufficiently large that continuum fluid mechanics remains valid. (a) Neglecting minor losses, what is the volume flow rate of water through the membrane? (b) Assuming the flow remains incompressible, what is the maximum pressure difference across the membrane at which the flow would be laminar?

Give the raw materials, process description,flow sheet, engineering problems faced in the manufacture of GLUE

Determine the lower heating value, in kJ per kmol of fuel and in kJ per kg of fuel, at 25 oC, 1 atm for \

(a) Gaseous ethane (C2H6).

(b) Liquid ethanol (C2H5OH).

Give the raw materials,process description, flow sheet,engineering problems faced in manufacture of LEATHER from HIDES AND SKINS

At a given flow parameter, we would like to increase G' from 0.1 to 0.2. Check which of the following will result.

A. The effect on pressure drop cannot be determined.

B. The pressure drop will decrease.

C. The pressure drop will increase.

D. The pressure drop will remain the same.

(a) Select eight correct statements from the following list. You will get one mark for every correct statement selected, but you will lose one mark for any incorrect statement you select, so do not just guess. No-one will go below 0 mark regardless of how many incorrect statements are selected.
1. The tonne of oil equivalent (toe) is a unit of power. 2. Thermal energy can be entirely converted into mechanical energy using an internal combustion engine. 3. At present, coal is the most abundant fossil-fuel in the word. 4. In the UK, oil-fired power production has been phased out following the high price of oil and the stringent emission limits introduced with the EU Large Combustion Plant Directive. 5. SOx and NOx emission is a greater issue in the operation of CCGT power plants rather than of coal-fired power plants. 6. Nuclear fusion is currently employed for electricity production in the UK. 7. In wind turbines, electromagnetic induction is essential to convert rotor kinetic energy into electrical energy. 8. A hydrogen fuel cell converts electricity into H2 and O2. 9. Semiconductor materials are essential for the operation of photovoltaics. 10. Stall and pitch control allow the safe operation of wind turbines. 11. Heat is always transferred from a hot to a cold body resulting is an overall decrease of entropy in an isolated system. 12. Impulse water turbines are ideal for high-head and low-flow hydro energy production. 13. Heat pumps are used to transfer heat from a warm to a cold environment. 14. District heating can be a form of Combined Heat and Power. 15. In the UK, tidal ebb generation provides four power generation peaks a day. 16. Information & Communication Technolo

1. A temperature measurement system shows the second order dynamics whose output y(s) in ⁰C and input x(s) in ⁰C is related with the transfer function                                              

Gs=(xs) / (ys)=(s2+8s+15) / 2

A step change of magnitude is introduced in this system. Determine

(a) Value of response               

(b) Y(t) at time t=3 sec

(c) Maximum value of Y(t)

(d) Ultimate value of Y(t)

(e) Minimum value of Y(t)

   How void swelling differs from irradiation growth?