A bubble-point feed mixture of 5 mol% A and 95 mol% B is to be distilled to obtain a distillate containing 35 mol% A and a bottoms containing 0.2 mol% A. The column has a partial reboiler and a partial condenser. If the constant relative volatility is given to be ?A,B = 6. Using graphical method, find out:

a) The minimum number of equilibrium stages.

b) The minimum boilup ratio: ??? /??

c) The actual number of stages if the boilup ratio is 1.2 times the minimum.

Methanol (also known as wood alcohol and methyl alcohol) is used as a raw material in the manufacture of formaldehyde, acetic acid, and a number of other chemicals. One way it can be synthesized is by reacting carbon dioxide and hydrogen:

CO₂ + 3H₂?CH₃OH + H₂O

The fresh feed to a methanol synthesis process contains hydrogen, carbon dioxide and 0.4 mole% inerts. The reactor effluent passes to a condenser that removes essentially all of the methanol and water formed and none of the reactants or products. The latter substances are recycled to the reactor. To avoid buildup of the inerts in the system, a purge stream is withdrawn from the recycle. The feed to the reactor (not fresh feed to the process) contains 28 mole% CO₂, 70 mole% H₂, and 2 mole% inerts. The single pass conversion of hydrogen is 60%. Calculate the molar flow rates and molar compositions of the fresh feed, the total feed to the reactor, the recycle stream and the purge stream for a methanol production rate of 110 kmol/h.

Please show how the solution was arrived at I'm trying to understand how to do the problem.

4.(2) The fern is defined as the unit of force required to accelerate a unit of mass, called the bung, with the gravitational acceleration on the surface of the moon, which is one-sixth the normal gravitational acceleration on earth. a) What is the conversion factor that would be used to convert a force from the natural unit to the derived unit in this system (“gc”)? b) What is the weight in ferns of a 5.6 bung object on the moon? What does the same object weigh in Seattle?

What are the factors that affect the different fouling behaviours of thin film composite (TFC) and cellulose triacetate (CTA) forward osmosis (FO) membranes when treating wastewater.

9.10. A completely mixed bioreactor is used for ethanol fermentation of hydrolyzed starch solution containing 30 g/l total sugar. The following data are available: ?_m = 0.15 h^–1, K_S = 0.5 g/l, F = 10 l/h, Y_X/S = 0.1 g X/g S, Y_P/S = 0.5 gP/gS, k_S = 0.1 d^–1.

a. For 95% conversion of substrate to product, determine the required reactor volume and ethanol productivity when the system was operated without cell recycle.

b. For the same degree of conversion, determine the required reactor volume and ethanol productivity when the system was operated with cell recycle. r = 0.4, C = X_r/X = 3, ? = 0.1.

A straight rod of solid polymer is of length 1 m and diameter 10 mm. The polymer is linearly viscoelastic with a tensile creep compliance given by:

D = 2- exp(-0.1t); Gpa^-1

Where t is in hours. The rod is suspended vertically and a mass of 10 kg is hung from it for 10 hours. a) Find the change of length of the rod. b) Identify the time domain of this property test procedure.

You should use NO MORE THAN 100 mL 0.25 M NH4OH, 4 g Ca(NO3)2· 4H2O, and/or 3 g (NH4)2HPO4. NOTE: This is not a stoichiometric recipe. Part of the grading for this lab will be based on your ability to determine appropriate quantities of each reactant. Clearly show the actual amount of each reactant you intend to use. Determine the mass or volume of each reactant in the proper stoichiometric ratio, to synthesize and analyze a sample of calcium hydroxyapatite. The unbalanced equation for the reaction is: H3O+(aq) + Ca(NO3)2(s) + (NH4)2HPO4(s) + NH3(aq) --> Ca10(PO4)6(OH)2(s) + NH4NO3(aq)

Part D: extraction of the mandelic acid solution with one 50ml aliquot of organic solvent

a) Calculate the moles of sodium hydroxide used to titrate the 5.0ml of extracted water

b) calculate the moles of mandelic acid in the 5.0ml of extracted water

c) determine the mass of the mandelic acid in the 5.0ml of extracted water.

d) determine the concentration of mandelic acid in g/ml

Part E:

Rank the extraction techniques from best to poorest in their ability to extract the mandelic acid from water.

hint: see parts a-c in separately asked questions

Determination of a partition coefficient

Mass of mandelic acid: 6.01g

[NaOH]: 0.1036

Table 1: titration of a 10.0 ml aliquot of mandelic acid solution with standard NaOH

average of three titrations: 38.31ml

table 2: titration of the 5.0 ml sample of extracted water

14. Which is NOT one advantage of membrane concentration over evaporation?

A. Higher product concentration after processing

B. Less nutritional loss

C. Less energy consumption

D. None of the above

.15 Ultrafiltration is usually used to separate _?

A. Yeasts

B. Bacteria

C. Proteins

D. Salts

Consider the combustion of acetamide:

4C2H5NO(s)+11O2(g)?8CO2(g)+10H2O(l)+2N2(g)  ?H=?4738kJ

Part A

How much heat is released when 375.0 g of water is produced?

Part B

Acetamide has a density of 1.159 g/mL. What volume of acetamide must be combusted to result in the release of 1850 kJ of heat?

In Particcular large scale chemical project such as ammonia etc etc

, explain where and how did you apply principles of inherent safety

Writte a summary of 500 words about the effect of ultrafiltration on the mass-transfer efficiency improvement in a pararell-plate countercurrent dialysis system.

cite the references

Methane gas is diffusing in a straight tube 0.1 m long containing helium at 298 k and a total pressure of 1.01325 x 10^5 Pa. the partial pressure of CH4 is 1.400 x 10^4 Pa at one end and 1.333 x 10^3 at the other end. Helium is insoluble in one boundary, and hence is non diffusing or stagnant. Calculate the flux of methane in kg mol/s m^2