1. An absorber is used to remove acetone from a nitrogen carrier gas. The feed, with acetone weight fraction 0.213, enters at a rate of 200 kg/h. The absorbing liquid is water, which enters at a rate of 1000 kg/h. The exit gas stream is 0.8 wt% acetone and 2.9% water vapour. Perform a degree of freedom analysis of the process (DFA)

Silica gel is to be used to separate a mixture of butane and butylene. The feed containing55% butane and 45% butylene is fed at the bottom of the column. The silica gel isintroduced at the top and travels from top to bottom. The adsorbed gases (the product) arestripped from the silica gel. It contains 92% butane and 8% butylene (by mol). What is thecomposition of the gas exiting the adsorption column?

In recovery a carboxylic acid from the fermentation broth, packed extraction tower has been used. The process is targeted to achieve 90% recovery of the carboxylic acid and at a minimum solvent usage. The feed into the system is set to 500kg/h which containing 15 wt% carbonic acid. 1000kg/h of the solvent has been used in this process. a. If the extraction did not achieve the targeted recovery, discuss 3 possible reasons and proposed the solution to increase the recovery rate.

This method of leak detection is simple and practical as it does not require expensive equipment, sometimes the use of antifreeze is required. c) ultrasonic detection b) ultraviolet light d) simple auditory inspection a) soap solution   Which of the following groups of refrigerants has the greatest impact on the ozone layer? b) HCFC d) HFC a) CFC c) HC

Q1 Gas (A) is diffusing through a non-diffusing water (B) in a wetted wall column. It was recorded that the bulk gas concentration and the bulk liquid concentration are ( 0.4, 0.12 ) respectively. Operating conditions were 25 °C, 1 atm. The individual mass transfer coefficient: K 3.62 kmol/s.m2, kL 3.04*10 kmol/s.m'. The solute-vapor pressure = 0.8 atm. The equilibrium equation: y 1.1 x Find the interface concentration in gas and liquid phase and then find the rate of mass transfer in gas and liquid phase. %3D %3D

Kindly use excel to calculate

.The following diffusion coefficients are are obtained from an experimental setup. The data is fitted to to an empirical model. The model predicts values as presented in the last column. Estimate what the accuracy of the model is by calculating the coefficient of determination (R) to at least 3 decimal places: Temperature (C) DExperimental (m-/s) DModel (m2/s) 100 1.16 x 10-10 0.55 x 10-10 200 2.26 x 10-10 2.1 × 10-10 300 3.34 x 10-10 2.98 × 10-10 400 4.04 × 10 10 3.85 × 10-10 500 5.01 x 10-10 4.57 x 10-10 600 6.11 x 10-10 6.42 x 10-10 700 7.32 x 10-10 6.93 x 10-10 800 8.36 x 10 10 7.51 x 10-10

An evaporation-crystallization process (as shown below) is used to obtain solid potassium sulfate from an aqueous salt solution. The feed contains 18.7 wt% K2SO4. The wet filter cake contains solid sulfate crystals and a 40.0 wt% salt solution. The filtrate is recycled to mix with the feed. The evaporator has a capacity of 175 kg of water evaporated per second. The filtrate has 40.0 wt% salt solution, as well, and from the water entering the evaporator, 45.0% is evaporated. In the wet filter cake, there is 10 kg of the solid crystals for every 1 kg of the salt solution. a.) Calculate the fresh feed rate. (Include units) b.) Determine the production rate of crystal. (Include units) c.) Calculate the recycle ratio. (kg recycle/kg feed) Include units

In a counter-current absorption tower, a process gas containing 0.04 (mole fraction) ammonia is scrubbed with pure water. The exit gas contains 0.002 (mole fraction) ammonia.The diameter of the tower is 1m, and the packing has a large area per volume of 200 m2m–3. The overall mass transfer coefficient based on the liquid side driving force, KL, is 1.5×10−5ms–1. The total gas and liquid concentrations are 0.6kmolm–3and 20 kmolm–3respectively and the gas flowrateis 0.03kmols–1. The actual liquid to gas ratio is 1.5 times that of the minimum liquid to gas ratio. The equilibrium for ammonia between the air and water is given by y* = 1.04x. Draw a rough sketch of the operating and equilibrium lines and label the slopes. How many transfer units are needed? What is the height of the tower?

Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE.  An evaporator is used to concentrate cane sugar solutions. A feed of 8000 kg/d of a solution containing 34 wt% sugar is evaporated, producing a 85 wt% solution. Calculate the rate at which the solution is produced and amount of water removed.