Recent questions in Chemical engineering

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Design a distillation column to separate a mixture of cyclohexane and toluene with a feed composition of 60 mol% cyclohexane and 40 mol% toluene. The distillate product should contain a minimum of 90 mol% cyclohexane and the bottom product should contain a maximum of 10 mol% cyclohexane. You have access to a temperature range of 80-150°C and a pressure range of 1-5 atm. Determine the number of theoretical plates required for this separation and the corresponding reflux ratio.

asked Feb 4 in Chemical engineering by Steve6884784 (450 points)

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1 answer 39 views

Design a distillation column to separate a mixture of acetone and water containing 35% (by mole) acetone with a feed rate of 1000 kg/hr. The desired purity of the overhead product is 99% acetone, and the bottom product should contain no more than 0.5% acetone. The available reflux ratio is 2.5, and the feed is at its boiling point at normal atmospheric pressure. Determine the number of theoretical trays required, the optimum feed tray location, and the reflux and boilup rates needed for the design.

asked Feb 4 in Chemical engineering by KerrieTillma (390 points)

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1 answer 40 views

Design a distillation column that separates a mixture of ethanol and water with a 95% ethanol purity and a production rate of 1000 liters per hour. The mixture contains 50% ethanol and 50% water by volume. The distillation column should operate at a pressure of 1 atm and a temperature range of 78-85°C. Assume that the feed enters the column as a saturated liquid and that the overhead product is 90% ethanol, while the bottom product is 5% ethanol. Determine the number of stages required and the reflux ratio for this system.

asked Feb 3 in Chemical engineering by HeribertoJef (430 points)

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1 answer 36 views

Design a distillation column that separates a mixture of benzene and toluene with a feed of 50 mol% benzene and 50 mol% toluene, into two product streams: one with a purity of 99% benzene and the other with a purity of 99% toluene. The total distillate flow rate should be 80% of the feed flow rate and the reflux ratio should be 1.5 times the minimum reflux ratio. Provide a complete design including the required stages, the reboiler duty, and the reflux flow rate.

asked Feb 3 in Chemical engineering by DaisyStow838 (400 points)

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1 answer 29 views

Design a distillation column that can separate a mixture consisting of 40% acetone, 30% methanol, and 30% ethanol with a feed rate of 100 mol/h. The distillate should consist of at least 98% acetone, and the bottom product should contain no more than 1% acetone. You may assume that the column operates at a constant pressure and has 20 equilibrium stages. Determine the reflux ratio and the number of trays required to achieve this separation.

asked Feb 3 in Chemical engineering by EdithColebat (510 points)

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1 answer 45 views

Design a distillation column that can effectively separate a mixture of ethanol and water with a composition of 60% ethanol and 40% water. The distillation column should have a reflux ratio of 1.5 and a total of 10 theoretical stages. Determine the operating conditions (temperature, pressure, and feed rate) needed to achieve a distillate product with a composition of 95% ethanol and a bottoms product with a composition of 5% ethanol.

asked Feb 3 in Chemical engineering by JimPowe74778 (290 points)

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1 answer 37 views

Design a distillation column that can effectively separate a mixture of 75% ethanol and 25% water with a feed rate of 1000 kg/hr. Your column should produce a distillate with a composition of at least 95% ethanol and a bottom product with no more than 5% ethanol. Assume the feed mixture enters the column at its boiling point and you have access to a cooling water supply at 20°C for the condenser. Provide a detailed design and justification of your column's operating conditions including temperatures, pressures, and flow rates.

asked Feb 3 in Chemical engineering by LuellaLind54 (450 points)

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1 answer 48 views

Design a distillation column that can effectively separate a mixture containing 50 wt% methanol and 50 wt% water. The column should produce a distillate with no more than 5 wt% methanol and a bottom product with no more than 2 wt% water. The feed rate is 1000 kg/h and the column must operate at atmospheric pressure. Assume that the feed is a saturated liquid and that the methanol-water mixture behaves as an ideal solution. Provide the design specifications for the column, including the number of trays or packing height, diameter, and other necessary specifications.

asked Feb 3 in Chemical engineering by OKZHeidi5094 (530 points)

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1 answer 41 views

Design a distillation column for the separation of a mixture containing 35% Ethanol and 65% Water. Calculate the number of theoretical plates required for the separation if the column operates at a pressure of 1 atm and a reflux ratio of 1.5.

asked Feb 3 in Chemical engineering by JanetFuw9785 (550 points)

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1 answer 27 views

Design a distillation column for the separation of a mixture composed of 50% ethanol and 50% water. The column must produce a distillate that is at least 95% ethanol and a bottoms stream that is at most 5% ethanol. The feed rate is 1000 kg/h and the reflux ratio is to be determined by the student. Provide the complete design of the distillation column including the number of theoretical trays, feed tray location, and the diameter of the column.

asked Feb 3 in Chemical engineering by JeremyGorsuc (330 points)

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1 answer 30 views

Design a distillation column for the separation of a binary mixture of ethanol and water, with a feed consisting of 50 weight percent ethanol and 50 weight percent water. The column should be able to produce a distillate product containing at least 90 weight percent ethanol, with a recovery of at least 95 weight percent of the ethanol in the feed. The feed rate is 1000 kg/hr and the reflux ratio should be optimized for the best separation efficiency. Determine the number of theoretical trays required for the column design and calculate the heat load required for the operation of the column.

asked Feb 3 in Chemical engineering by LorrineClant (670 points)

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1 answer 51 views

Design a distillation column for the separation of a binary mixture consisting of ethanol and water. The feed mixture contains 40 mol% ethanol and 60 mol% water, and the desired product purity is 95 mol% ethanol. The feed rate is 1000 kg/hr and the column should operate at atmospheric pressure. Calculate the number of theoretical plates required to achieve the desired separation and determine the corresponding height and diameter of the column.

asked Feb 3 in Chemical engineering by AudreaPickar (600 points)

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1 answer 28 views

Design a counter-current heat exchanger to cool 10,000 liters per hour of cyclohexane at 110°C down to 50°C, while heating 7,500 liters per hour of water at 25°C up to 80°C. The cyclohexane will be cooled by water which enters the heat exchanger at 90°C and exits at 60°C. The overall heat transfer coefficient is expected to be 1,000 W/m2K. Determine the required heat transfer area and the pressure drop across the heat exchanger.

asked Feb 3 in Chemical engineering by KathaleenBea (550 points)

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1 answer 38 views

Design a cost-effective and environmentally sustainable process for the production of biofuels from lignocellulosic materials, integrating pre-treatment, enzymatic hydrolysis and fermentation steps, while optimizing yield, energy efficiency, and minimizing waste generation.

asked Feb 3 in Chemical engineering by LawannaClem7 (350 points)

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1 answer 28 views

Design a continuous stirred-tank reactor (CSTR) for the exothermic reaction of A + B → C with a rate constant of 0.05 L/mol/min. The reactor should produce a minimum of 500 g of C per minute, while maintaining a conversion of at least 90%. The feedstream of A and B is available with a flow rate of 2 L/min and an initial concentration of 1 M for both reactants. The reactor should be operated at a temperature of 50°C and a pressure of 1 atm. What should be the volume of the CSTR and the flow rate of the cooling medium used to maintain the desired temperature?

asked Feb 3 in Chemical engineering by HelenaFlemin (430 points)

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1 answer 39 views

Design a chemical reactor with a capacity of 100 liters and determine the operating conditions (temperature, pressure, and flow rate) required to achieve a 95% yield of product X in a specific reaction. The reaction rate constant is known to be 0.1/min and the initial concentration of reactant A is 2 mol/L. Use the design equation for a first-order irreversible reaction and assume a constant density of the reaction mixture.

asked Feb 3 in Chemical engineering by ThomasTolley (770 points)

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1 answer 34 views

Design a chemical reactor to produce 500kg of ammonia per hour from hydrogen and nitrogen gases. You are given the rate equation for the reaction as follow: N2(g) + 3H2(g) → 2NH3(g) The reaction is exothermic and a temperature range of 400-500°C is recommended for optimal production rate. The pressure of the system should be between 150-200 atm. You are required to determine the required size of the reactor and the flow rates of hydrogen and nitrogen gas.

asked Feb 3 in Chemical engineering by Victor294844 (590 points)

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1 answer 44 views

Design a chemical reactor to produce 500 kg of ethylene oxide per hour from ethylene and oxygen gases. Assume the reaction occurs isothermally, and the reactor operates at 3 atm and 250°C. The conversion of ethylene to ethylene oxide is 90%, and the selectivity of ethylene oxide is 97%. You can use either a plug-flow reactor or a continuous stirred-tank reactor. Determine the volume and dimensions of the reactor, and also its cost, assuming a stainless steel construction.

asked Feb 3 in Chemical engineering by KirbyRedmond (710 points)

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1 answer 24 views

Design a chemical reactor that can produce 100 kg of ammonia per hour using the Haber Process, given the following parameters: - Temperature: 450°C- Pressure: 200 atm- Catalysts: Magnetite and Alumina- Reactants: Nitrogen and Hydrogen at a 3:1 molar ratio.

asked Feb 3 in Chemical engineering by Emmett04N936 (450 points)

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1 answer 36 views

Design a chemical reactor that can efficiently convert 100 kg/hr of propane gas to propylene gas at a temperature of 500°C and a pressure of 2 atm. The desired conversion rate is 90%, while minimizing the production of unwanted byproducts. The reactor must also be safe and economically feasible, with a maximum capital cost of $1.5 million and a minimum expected lifetime of 10 years. What type of reactor, catalyst, and operating conditions would you recommend and why?

asked Feb 3 in Chemical engineering by Jerrold99K8 (390 points)

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