Recent questions in Chemical engineering

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Design a heat exchanger that can effectively transfer heat between a hot stream of ethanol with a flow rate of 2 kg/s and a cold stream of water with a flow rate of 5 kg/s. The inlet temperature of ethanol is 80°C, while the inlet temperature of water is 20°C. The outlet temperature of ethanol should be 30°C, while the outlet temperature of water should not exceed 35°C. The heat exchanger should have a heat transfer coefficient of at least 500 W/m^2K and a total surface area of no more than 10 m^2.

asked Feb 4 in Chemical engineering by KenOlvera57 (2.1k points)

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1 answer 108 views

Design a heat exchanger for the production of sulfuric acid at a flow rate of 1000 liters per hour. The inlet temperature of the acid is 80°C and the desired outlet temperature is 30°C. The cooling water is available at 20°C and has a flow rate of 2000 liters per hour. Determine the required heat transfer area of the heat exchanger assuming the overall heat transfer coefficient is 800 W/(m²K). What material would you recommend for the heat exchanger tubes and why?

asked Feb 4 in Chemical engineering by AleciaAlleyn (1.5k points)

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1 answer 69 views

Design a heat exchanger for a specific process that involves heating a liquid from 20°C to 60°C. The liquid has a flow rate of 500 L/hr, and it will be heated by steam at a pressure of 3 bar. The heat transfer coefficient for the steam is 3000 W/(m²·K), and the overall heat transfer coefficient for the heat exchanger is 500 W/(m²·K). Determine the surface area required for the heat exchanger and the flow rate of steam required to heat the liquid.

asked Feb 4 in Chemical engineering by RenaBrower51 (1.7k points)

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1 answer 65 views

Design a heat exchanger for a specific process involving the heating of ethanol from 20°C to 80°C. The process flow rate of ethanol is 200 L/hr, and the heating medium is water available at 90°C with a flow rate of 500 L/hr. The heat transfer coefficient for the heat exchanger is 1000 W/m²K. Determine the surface area required for the heat exchanger to achieve the desired heating of ethanol using the given data.

asked Feb 4 in Chemical engineering by FranziskaEve (1.9k points)

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1 answer 73 views

Design a heat exchanger for a specific process in which a 50,000 kg/day of a mixture with a specific heat capacity of 3.5 kJ/kg.K needs to be heated from 20°C to 70°C using a hot stream of 100,000 kg/day of a fluid with a temperature of 150°C. The heat exchanger needs to operate with a heat transfer coefficient of at least 400 W/m2.K and the pressure drop across the heat exchanger should be no more than 0.5 bar. What type of heat exchanger would be most suitable and what are the dimensions required to achieve the desired performance?

asked Feb 4 in Chemical engineering by AdaFennescey (1.8k points)

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1 answer 75 views

Design a heat exchanger for a process where hot air (80°C) needs to be cooled down to 30°C using water (10°C) as the cooling medium. The flow rate of hot air is 2 kg/s and the desired outlet temperature of the cooled air is 35°C. The maximum allowable pressure drop for air side is 50 kPa and for water side is 100 kPa. Design the heat exchanger using the LMTD (logarithmic mean temperature difference) method and calculate the required area of heat transfer.

asked Feb 4 in Chemical engineering by LoreneQ88420 (1.8k points)

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1 answer 128 views

Design a heat exchanger for a factory that produces 10,000 liters of sulfuric acid per day starting at 70°C and needs to be cooled to 40°C for packaging. The available cooling water supply from the local municipal is at 20°C and is available at a flow rate of 1000 liters per minute. Design the heat exchanger to achieve the required temperature drop and calculate the heat transfer coefficient and the overall heat transfer coefficient.

asked Feb 4 in Chemical engineering by FredrickNobe (2.2k points)

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1 answer 43 views

Design a heat exchanger for a chemical process that requires the transfer of heat from a hot stream containing molten sodium at 1100°C to a cold stream containing water at 25°C. The hot stream inlet flow rate is 1000 kg/hr, and the cold stream outlet temperature should be limited to a maximum of 70°C. The heat transfer coefficient for the tubeside and shellside is 1000 W/m²K and 500 W/m²K, respectively. The design should minimize the size and cost of the heat exchanger while meeting the thermal requirements of the process.

asked Feb 4 in Chemical engineering by MagdaMeares (1.8k points)

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1 answer 90 views

Design a heat exchanger for a chemical process that requires heating of 50 kg/hr of water from 25°C to 80°C using steam as the heating medium. The available steam is at a pressure of 1.5 MPa and a temperature of 300°C. The overall heat transfer coefficient between the water and the steam is 600 W/m2K. The heat exchanger should be designed to accommodate a temperature drop of 5°C for both the water and the steam. Determine the required surface area of the heat exchanger and the mass flow rate of steam required to meet the process requirements.

asked Feb 4 in Chemical engineering by FerminRosale (1.5k points)

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1 answer 76 views

Design a heat exchanger for a chemical process that involves cooling 1000 kg of a liquid from 80°C to 40°C using water as the cooling fluid. The process flow rate is 5 kg/min and the maximum allowable pressure drop in the heat exchanger is 5 kPa. Assume a heat transfer coefficient of 1000 W/m²K for the liquid and 5000 W/m²K for the water. Design the heat exchanger to occupy a maximum area of 20 m². What is the surface area of the heat exchanger required and what would be the optimal flow configuration?

asked Feb 4 in Chemical engineering by BrodieUus47 (1.7k points)

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1 answer 65 views

Design a heat exchanger for a chemical plant which produces 1000 kg/hr of a chemical at a temperature of 350°C. The chemical needs to be cooled down to 50°C using water at an inlet temperature of 25°C. The cooling water flow rate should not exceed 5000 kg/hr. The overall heat transfer coefficient should be at least 500 W/m2K. Determine the surface area of the heat exchanger required for this process.

asked Feb 4 in Chemical engineering by CorineSasaki (1.8k points)

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1 answer 78 views

Design a distillation column to separate a mixture that contains 40% ethanol and 60% water by weight with a desired ethanol purity of 95%. The feed rate of the mixture is 100 kg/hr and the reflux ratio is 3:1. Determine the number of theoretical plates required and the height of the column. Assume that the total condenser and reboiler are both at 100°C and that the distillate leaving the column is 90% liquid and 10% vapor.

asked Feb 4 in Chemical engineering by ChandraPicke (1.7k points)

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1 answer 102 views

Design a distillation column to separate a mixture of ethanol and water. The feed stream contains 20 mol% ethanol and the desired distillate should contain at least 95 mol% ethanol. The reflux ratio should be 3:1 and the column should have 25 theoretical trays. Determine the composition of the distillate, bottoms, and the optimal feed tray location to achieve the desired separation. Use McCabe-Thiele method to determine the number of theoretical trays required.

asked Feb 4 in Chemical engineering by HermelindaYm (2.3k points)

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1 answer 101 views

Design a distillation column to separate a mixture of ethanol and water with an initial composition of 40% ethanol and 60% water. The column should achieve a separation of at least 95% ethanol in the distillate product. The available packing materials are Pall rings with a diameter of 1.5 inches and a height of 2 inches. The column inlet flow rate is 1000 kg/hr with a pressure of 1 atm and a temperature of 80°C. The column should have 25 theoretical plates and operate at reflux ratios ranging from 1.5 to 3.0. Additionally, the column diameter should not exceed 3 feet. Provide the design calculations and specifications for the distillation column.

asked Feb 4 in Chemical engineering by LouellaComo (1.5k points)

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1 answer 88 views

Design a distillation column to separate a mixture of ethanol and water when the initial mixture contains 30% ethanol and 70% water. The desired final concentration of ethanol in the distilled product is 95%. The distillation column is 14 trays high and the reflux ratio is set at 2.2. Calculate the minimum number of theoretical trays required in the distillation column and provide the final composition of the ehtanol product stream.

asked Feb 4 in Chemical engineering by BlondellHock (1.9k points)

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1 answer 77 views

Design a distillation column to separate a mixture of ethanol and water using McCabe-Thiele Method. The feed contains 50 mol% ethanol and the distillate should have a purity of at least 95 mol% ethanol. The reflux ratio is 2.5 and the boil-up ratio is 1.5. The column must have 10 theoretical plates. Determine the number of trays above the feed and below the feed and the corresponding compositions of the distillate and bottoms.

asked Feb 4 in Chemical engineering by KatherinaI21 (1.8k points)

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1 answer 113 views

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 CandelariaFi (1.6k points)

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1 answer 112 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 IsabelleTitu (1.8k points)

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1 answer 94 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 JonasOql0066 (1.5k points)

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1 answer 93 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 MarcyVallejo (2.2k points)

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