Engineering

Chemical EngineeringQ&A LibraryThe analysis of pesticides for environmental extracts using chromatography typically requires a solvent exchange from dichloromethane (DCM) to a chromatograph-compatible solvent such as hexane. If DCM and hexane can be separated after the procedure, they can be recycled to reduce waste. A mixture of liquid hexane and DCM (50wt% hexane) is fed to an evaporator resulting in a vapor containing 70wt% hexane and liquid containing 10wt% hexane.a. Draw and label a flowchart for a continuous and steady-state process with a feed rate of 200.0 kg/min. Write out the general mass balance equations for total mass and hexane. Explain why you are discarding any of the terms. Solve the equations to find the mass flow rates of the vapor and liquid streams leaving the evaporator.b. Draw and label a flowchart if the process is performed in a closed container filled initially with 200.0 kg of the 50:50 mixture. Write out the integral mass balances for total mass and hexane. Explain why you are discarding any of the terms. Solve the equations to find the masses of the final vapor and liquid phases.Question

The analysis of pesticides for environmental extracts using chromatography typically requires a solvent exchange from dichloromethane (DCM) to a chromatograph-compatible solvent such as hexane. If DCM and hexane can be separated after the procedure, they can be recycled to reduce waste. A mixture of liquid hexane and DCM (50wt% hexane) is fed to an evaporator resulting in a vapor containing 70wt% hexane and liquid containing 10wt% hexane.

a. Draw and label a flowchart for a continuous and steady-state process with a feed rate of 200.0 kg/min. Write out the general mass balance equations for total mass and hexane. Explain why you are discarding any of the terms. Solve the equations to find the mass flow rates of the vapor and liquid streams leaving the evaporator.

b. Draw and label a flowchart if the process is performed in a closed container filled initially with 200.0 kg of the 50:50 mixture. Write out the integral mass balances for total mass and hexane. Explain why you are discarding any of the terms. Solve the equations to find the masses of the final vapor and liquid phases.

Tagged in

Find answers to questions asked by student like you

Show more Q&A

Q: The T-x-y and P-x-y diagrams for the binary benzene-toluene system is shown below. a. The bubble po...

A: Click to see the answer

Q: (a) If 300 lb of air and 24.0 lb of carbon are fed to a reactor at 600 ° and after complete combusti...

A: Part (a)Moles of Carbon fed to the reactor is written as equation (1).Moles of Air fed to the reacto...

Q: The oxidative coupling of methane to form ethylene (2 CH4 + O2 -> C2H4 + 2 H2O) is known as the “...

A: Dear student, we answer three parts in a question. So, we are providing answers to the first three p...

Q: The oxidative coupling of methane to form ethylene (2 CH4 + O2 -> C2H4 + 2 H2O) is known as the “...

A: Part (a)For an ideal gas,mole fraction = volume fractionFrom the given volume percent of the inlet g...

Q: Determine the specific potential energy change that water undergoes when a mass of water is raised 4...

A: Specific potential energy is the potential energy of 1 unit mass of the object. Change in specific p...

Q: 100L/hr of a 40mol% hydrochloric acid solution (25°C) is diluted with pure water (also 25°C) to make...

A: Convert the given volumetric flowrate of the 40 mol% HCl solution into its molar flowrate using the ...

Q: Answer a - d. (a) What is the constant volume heat capacity (Cv) for HBr, assuming it is an ideal ga...

A: Dear student, we answer only threee questions in a thread. so, we are providing answers to the first...

Q: PLEASE ANSWER B, C AND D. PLEASE ANSWER B, C AND D. PLEASE ANSWER B, C AND D.

A: The question has too many sub parts, we are only answering first three partsPart (a)For tank A,Mass ...

Q: 1:02 AM ll Verizon 99%- Done 4. The enthalpy of vaporization of water at 100 °C is 2256.9 kJ/Kg. Ass...

A: Watson equation is to be used as written below. Here, ΔH1 is enthalpy of vaporization at T1.ΔH2 is e...