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You plan to use a tank of total volume V= 10 m3 to remove a contaminant at concentration Cin = 1 g/m3 from a waste stream with a flow rate of Q = 1 m3/h. The reaction is first order with a rate constant k1 = 0.5 h-1. Being a good process engineering, you run a tracer study and find that the tank can be represented as a CSTR in contact with a well-mixed but relatively stagnant region. The volume of the stagnant region is Vs = 2 m3 and the exchange flow between the two regions is q= 0.2m3/h.
a. Using symbols, draw the control volumes and develop the transient (unsteady-state) mass balance for both compartments.
b. Assuming steady-state, calculate the effluent concentration from the reactor.
c. Compare (b) to the case where the entire tank is considered to be well mixed. What do you conclude?
Calculate the precentage of carbon hydrogen and oxygen in ethanoic acid.
The saturated unit weight of the clay is 20kN/m 3 and that of the sand 19 kN/m 3 ; above the water table the unit weight of the sand is 16.5 kN/m 3 . Calculate the effective vertical stresses at the top and bottom of the clay layer.
A delivery company accepts only rectangular boxes the sum of whose length and girth (perimeter of a cross section) are equal to 108cm. Find the dimensions of an acceptable box of a largest area.
Photovoltaic array, Under insolation conditions of 500 W/m^2 (direct sunlight), and 10% solar cell efficiency
Think of a situation where CAD is a better choice then traditional drafting. Given multiple ways to input coordinates, is one way better than another? Are there situations where you ell use one method over and other?
Starting from x = 0 with no initial velocity, the acceleration of a race car is defined by the relation a = 6.8e- 0.00057x , where a and x are expressed in m/s 2 and meters, respectively. Determine the position of the race car when v = 30 m/s.
Determine the projected component of the force fac along the axis of strut ao. Express the result as a cartesian vector.
Calculate the overall modulus of the composite, explaining your calculations and the assumptions you have made when it is loaded:
A distance of 200 ft must be taped in a manner to ensure a standard deviation smaller than ± 0.03 ft. What must be the standard deviation per 100 ft tape length to achieve the desired precision?
Sketch a streamline, pathline, and streakline, For a given flow the velocity from time t=0 to t=5s was u=2 m/s, v=0. Then from t=5s to t=10s the velocity was u=+3 m/s, v=-4 m/s. A dye streak was started at t=0
A four-lane freeway is on a mountainous terrain with 11-ft lanes, a 5-ft right-side shoulder, and a 3-ft left side shoulder. During the peak hour there are 12% trucks and buses and 6% recreational vehicles.
A company that manufactures regenerative thermal oxidizers made an investment 10 years ago that is now worth $1,300,000. How much was the initial investment at an interest rate of 15% per year (a) simple interest and (b) compound interest?
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