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In order to calculate production rate & recycle flowrate we apply first overall mass balance over entire system to find out the water evapourated & production rate. Then applying balance over crystalliser to find flow ot of the evaporater by which we can then calculate recycle flowrate.
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#3 Consider the process flow diagram below for the recovery of a crystalline salt from a...
Fresh air containing 5.00 mole % water vapor is to be cooled and dehumidified to a...
Fresh air containing 5.00 mole % water vapor is to be cooled and dehumidified to a water content of 2.13 mole % H2O. A stream of fresh air is combined with a recycle stream of previously dehumidified air and pass through the cooler. The blended stream entering the unit contains 2.88 mole % H2O. In the air conditioner, same of the water in the feed stream is condensed and removed as liquid. A fraction of the dehumidified air leaving the...
Engineers Sophia and Giles are modifying a process to make concentrated apple cider starting from a...
Engineers Sophia and Giles are modifying a process to make concentrated apple cider starting from a slurry - a slurry is a mixture of solids in a liquid that can normally be pumped. A slurry made with apples having a mass fraction of 0.462 and the balance water is fed to a juicer at a rate of 31.7 kg/min. Seventy percent of the apples entering the juicer leave as part of the solid waste stream (containing apples and water). The...
Terephthalic acid (TPA) is synthesized from -xylene (PX) in the process C8H10 +302 – C8H6O4 +2H2O...
Terephthalic acid (TPA) is synthesized from -xylene (PX) in the
process C8H10 +302 – C8H6O4 +2H2O shown below. A fresh feed of pure
liquid PX combines with a recycle stream containing PX and a
solution (S) of a catalyst (a cobalt salt) in a solvent (methanol).
The combined stream, which contains S and PX in a 3:1 mass ratio,
is fed to a reactor in which 90% of the PX is converted to TPA. A
stream of air at 25...
12 3. (35 pts) Ammonia (NHa) is synthesized from nitrogen and hydrogen. Fresh feed, which contains...
12 3. (35 pts) Ammonia (NHa) is synthesized from nitrogen and hydrogen. Fresh feed, which contains only N2 and H2, is blended with a recycle stream containing the same species composition of the mixture entering the reactor contains 50% excess H2 The fractional conversion of N2 in the reactor operated at T = 400°C, P = 2000 psig isXu2-05. Allspecie exit ammonia as a pure liquid and recycles the volatile components the reactor in the gas phase and are directed...
4. In order to meet pollution standards, oil refineries remove trace amounts of sulfur from the...
4. In order to meet pollution standards, oil refineries remove trace amounts of sulfur from the crude oil. This sulfur is often in the form of H2S and SO2. A process has been suggested to convert these compounds into sulfur and water using the following reaction: 2H,ste)+S0,(g)- 3s6)+2H,og) A schematic of the facility is shown below. Due to the difficulty (and cost) of achieving high purity, the input streams (Fi and F2) both contain significant concentrations of CO2. The input...
Consider the Ballard Locks as shown below. When traveling from the lake to the bay, there...
Consider the Ballard Locks as shown below. When traveling from
the lake to the bay, there is a difference in
height of an average of 21 feet. The high side is the fresh water
side. The locks allow boats traveling from fresh water to be
lowered gently in an enclosed ‘lock’ down to the level of the salt
water in the bay. A boat enters the locks through double entry
gates on the fresh water (right) side. The entry gates...
Figure 1 represents the flow diagram of the production of ammonia from hydrogen and nitrogen (Haber...
Figure 1 represents the flow diagram of the production of ammonia from hydrogen and nitrogen (Haber process), according to the following reaction at 400°C and atmospheric pressure: N2(g) + 3H2(g) + 2NH3(9) TN).6 TH).6 7 Yis 1,6 = 9.7 6 5TH = 0 kmol h-1 3 TH(a). T.1 ANN (9) TIN2(g) 4 = 1,623.4 = 0 kmol h-1 Figure 1. Flow diagram for question 1. The process is designed for a target production of 200 kmol h of pure ammonia....
Ethanol is often used as a fuel additive, but to function in most engines, the ethanol...
Ethanol is often used as a fuel additive, but to function in
most engines, the ethanol must be very pure and contain little
water. It is difficult to distill ethanol and water above 90 mole %
ethanol because at this concentration the vapor and the liquid
phases of this mixture have the same composition. To get around
this effect, benzene is often added to the mixture. The
distillation column then separates the mixture into a very nearly
pure ethanol stream,...
Caffeine is often added to headache medications because it affects the flow of blood in vessels...
Caffeine is often added to headache medications because it
affects the flow of blood in vessels and may enhance the pain
relieving qualities of the medication. You have been tasked with
evaluating one process that extracts caffeine from a coffee slurry,
and you decide to study a small scale version of the process. A
coffee slurry containing a mass fraction of 0.01 g caffeine/g, 0.08
g other solids/g, and 0.91 g water/g is fed to a mixer at a rate...
This is an open-book. closed-notes exam. To receive full credit on these problems you need to...
This is an open-book. closed-notes exam. To receive full credit on these problems you need to use the problem solving methods presented in the text and used in class. You must also clearly label all equations that you write and identify your answers by drawing a box around them. Ethylene glycol (EG) is produced by the reaction between ethylene oxide (EO) and water C_2H_4O + H_2Orightarrow C_2H_6O_2 Ethylene glycol can further react with ethylene oxide to form diethylene glycol (DEG)...
Terephthalic acid (TPA) is synthesized from -xylene (PX) in the
process C8H10 +302 – C8H6O4 +2H2O shown below. A fresh feed of pure
liquid PX combines with a recycle stream containing PX and a
solution (S) of a catalyst (a cobalt salt) in a solvent (methanol).
The combined stream, which contains S and PX in a 3:1 mass ratio,
is fed to a reactor in which 90% of the PX is converted to TPA. A
stream of air at 25...
12 3. (35 pts) Ammonia (NHa) is synthesized from nitrogen and hydrogen. Fresh feed, which contains only N2 and H2, is blended with a recycle stream containing the same species composition of the mixture entering the reactor contains 50% excess H2 The fractional conversion of N2 in the reactor operated at T = 400°C, P = 2000 psig isXu2-05. Allspecie exit ammonia as a pure liquid and recycles the volatile components the reactor in the gas phase and are directed...
4. In order to meet pollution standards, oil refineries remove trace amounts of sulfur from the crude oil. This sulfur is often in the form of H2S and SO2. A process has been suggested to convert these compounds into sulfur and water using the following reaction: 2H,ste)+S0,(g)- 3s6)+2H,og) A schematic of the facility is shown below. Due to the difficulty (and cost) of achieving high purity, the input streams (Fi and F2) both contain significant concentrations of CO2. The input...
Consider the Ballard Locks as shown below. When traveling from
the lake to the bay, there is a difference in
height of an average of 21 feet. The high side is the fresh water
side. The locks allow boats traveling from fresh water to be
lowered gently in an enclosed ‘lock’ down to the level of the salt
water in the bay. A boat enters the locks through double entry
gates on the fresh water (right) side. The entry gates...
Figure 1 represents the flow diagram of the production of ammonia from hydrogen and nitrogen (Haber process), according to the following reaction at 400°C and atmospheric pressure: N2(g) + 3H2(g) + 2NH3(9) TN).6 TH).6 7 Yis 1,6 = 9.7 6 5TH = 0 kmol h-1 3 TH(a). T.1 ANN (9) TIN2(g) 4 = 1,623.4 = 0 kmol h-1 Figure 1. Flow diagram for question 1. The process is designed for a target production of 200 kmol h of pure ammonia....
Ethanol is often used as a fuel additive, but to function in
most engines, the ethanol must be very pure and contain little
water. It is difficult to distill ethanol and water above 90 mole %
ethanol because at this concentration the vapor and the liquid
phases of this mixture have the same composition. To get around
this effect, benzene is often added to the mixture. The
distillation column then separates the mixture into a very nearly
pure ethanol stream,...
Caffeine is often added to headache medications because it
affects the flow of blood in vessels and may enhance the pain
relieving qualities of the medication. You have been tasked with
evaluating one process that extracts caffeine from a coffee slurry,
and you decide to study a small scale version of the process. A
coffee slurry containing a mass fraction of 0.01 g caffeine/g, 0.08
g other solids/g, and 0.91 g water/g is fed to a mixer at a rate...
This is an open-book. closed-notes exam. To receive full credit on these problems you need to use the problem solving methods presented in the text and used in class. You must also clearly label all equations that you write and identify your answers by drawing a box around them. Ethylene glycol (EG) is produced by the reaction between ethylene oxide (EO) and water C_2H_4O + H_2Orightarrow C_2H_6O_2 Ethylene glycol can further react with ethylene oxide to form diethylene glycol (DEG)...
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