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A catalytic process was designed to make 150,000 metric tons per year of product with a net profit of $0.25/lb of product. The catalyst for the process costs $10/lb and it takes two months to shut down the process, empty the old catalyst, reload fresh catalyst, and restart the process. The feed and product recovery and purification sections can be pushed to make as much as 120% of design basis capacity. The reactor section is sized with sufficient catalyst to make 100% of design basis when operated with fresh catalyst at 500 °F. The reactor can only be operated at temperatures up to 620 °F, for safety reasons. The reactor weight hourly space velocity (lb of product per hour per lb of catalyst) is given by the equation:
where t = time on stream in monthsT = time on stream in months T = temperature
Find the optimal temperature versus time profile for the reactor and determine how long the process should be operated before the catalyst is changed out.
Design the most efficient centrifugal pump that produces 200 gpm (45.5cumeters/hr) water flow rate at 100 psi (680 kPa) head. Specify the impellor diameter and width for a 3400 rpm service.
Draw highly magnified views of each solution individually, and the mixed solution including any product that forms. Write the balanced equation for the reaction. What do you think of your sketch, and what do you think this says about the nature of..
The dc resistance of the armature at this temperature is 0.0335 Ω per phase. Compute the effective armature ac resistance in per unit and in ohms per phase at 25°C.
A flow process produces work using water as the working medium. The process is as follows: steam of quality 50% at 1 bar is compressed adiabatically to 20 bar; is heated isothermally by absorbing 3500 kJ/kg of heat; is expanded adiabatically to an..
If the generated emfs are 200 and 210 V, respectively, determine the load voltage and the armature current of each machine.
Acetone is to be extracted from a solution in water, using 1,1,2-trichloroethane. The feed concentration is 45.0% w/w acetone. Determine the number of stages required to reduce the concentration of acetone to below 10%, using 32 kg of extraction-s..
What is the rationale for claiming that the presence of a low temperature loss peak is a necessary and sufficient condition for good room-temperature impact strength
A vessel holding some liquid is placed in a vacuum chamber that is constantly pumped. Gas leaks from the vessel into the vacuum through a small hole, radius 4.15 micro m, but the pressure inside the vessel remains 38.6 kPa. After a day mass of the..
question 1a identify the components of a fire triangleb explain the condition required for combustion process to be
Calculate the required value of Ta1 if the film temperature falls to 34°C, and the value if it rises to 36°C.
As a system increases in volume, it absorbs 55.0 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.502 atm. The final volume of the system is 57.7 L. What was the initial volume of the system if t..
Show that, if the (common) mechanisms within the cells are of zero deficiency, and are weakly reversible, then the whole multicell reaction system is quasi thermodynamic.
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