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In the acrogenic process introduced in Problem 15.1, the catalyst is packed in tubes and the reactor is cooled using a circulating molten salt. The molten salt rejects heat to boiling steam in a similar arrangement to that shown for phallic anhydride in Figure 15.25. The required gas hourly space velocity is 200 standard liters (at STP)/liter.h. Design and size a reactor to produce 20 kt/y of acrogenic.
Problem 15.1
Acrolein (H2C=CHCHO) is made by selective oxidation of propylene at 2 bar, 350 °C using a molybdenum, iron, and bismuth catalyst on a silica support. The reactor yields based on propylene are 85% acrolein, 10% acrylic acid, and 5% light by-products. The light byproducts are mostly acetaldehyde, but for the purpose of this problem it can be assumed that the yield is 85% acrolein and 15% acrylic acid. The feed to the reactor on a volume percent basis is propylene 6%, propane 28%, steam 6%, oxygen 11%, and balance nitrogen. Estimate the reactor cooling requirement for a plant that produces 20,000 metric tons per year (20 kt/y) of acrolein if the reactor is operated isothermally.
A steam power plant employs a closed feedwater heater to improved the thermal efficiency. Draw a chematic and T-S diagram for the cycle, and labe it. Write an expression for the thermal efficienc of the ecycle in accordance with the labelling
For the circuit below, when R1 = 1KΩ, R2= 2KΩ, RL = 4KΩ, and gm = 1 mA/V, what is the voltage gainvo/vsig ?
A somewhat discharged automotive battery has an open-curcuit voltage of 12.5 V and supplies 50 A when a 0.1 ohm resistance is connected across the battery terminals. find the thevenin equivalent voltage
A motor's shaft is spinning at a speed of 1800 r/min. What is the shaft speed in radians per second
The output voltage of an AM transmitter is given by 500(1+.4sin3140t)sin6.28x107t. This voltage is fed to a load of 800 ohms. Determine the following. The carrier frequency The modulating frequency The peak carrier amplitude
How good was the hand analysis in determining the appropriate resistor values and what do you think introduced more variation into the design, the more accurate transistor models or the restrictions on the resistor values?
A simple voltage divider circuit is used to measure the output of a transducer whose total resistance is 1000 ± 1percent. The internal resistance of voltmeter is 10000 ± 5percent, and the meter is calibrated to read with in ½ % ofthe true voltage ..
Control Systems- PID Controller, Which one of the following statements regarding the operation of a PID controller is definately false?
the CMRR of a differential votage amplifier is specified as CMRR >10³, its voltage gain is G=50. the two input voltage have values v1=10.3 and v2=10.1.
Write and test a program for the EASy68k to input a string from the keyboard, convert all letters to uppercase and echo (output) the new string to the screen. Use a subroutine to perform the lower-to-upper case conversion.
Determine the nominal reactive power rating of the capacitor bank.
However, for short-time operation, a delta connection can be used at the nominal wye voltage. Find the ratio between the power delivered to the same motor in the wye and delta connections.
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