1. Three tanks are interconnected non-interactively. The fluid enters the first tank at the flow rate q and the third leaves the tank at flow rate q3. The speed of the fluid coming out of the third tank is fixed by means of a pump. It is maintained. According to this, a) Mathematically the effect of the change in the velocity of the fluid entering the first tank on the liquid height in the third tank Please express. (The areas of the tanks are equal to each other.) b) If the velocity of the fluid entering the first tank is suddenly increased by 10 units, the height of the liquid in the third tank over time express the change mathematically. (The time constant of the first and second tanks are 2 minutes and 3 minutes respectively, area of tanks 1 m2 'D.) * Show the system schematically
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A packed bed reactor is also known as a fluidized bed
reactor?
Only when using an alias
Depends on the catalyst used
True
Always false
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Mixing of citric acid takes place in a 12-liter capacity tank. The tank has
initially (t = 0), 4 Liters of fresh water (no citric acid). Citric acid solution stream at 0.1 kg/L concentration enters the tank at a rate = 0.1 L/min. The citric acid solution leaves out from a
nozzle in the tank at a rate = (t+1) L/min. Assume the tank is well-mixed and no reaction takes place.
1. Sketch and label the tank and show if the system is steady state or not, why?
2. Derive the ODE that show the relationship between citric acid concentration and
time?
3. Solve the ODE to get a relationship between Citric acid concentration and time?
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Explain the production of methanol by one-step,
two-step and auto thermal reforming process in detail?
b) What are the types of reactors employed in the synthesis of
methanol?
1000 words each
thanks
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Q. 1. Explain the role of Oman government in reducing
the carbon foot print of the nation.
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Hydrogen is produced by the reaction: ?? (?) + ?2? (?) → ??2 (?) + ?2 (?) The feed stream to the reactor is an equimolar mixture of carbon monoxide and steam, and it enters the reactor at 425 K and atmospheric pressure. If 70 % of steam is converted to hydrogen and if the product steam leaves the reactor at 750 K, how much heat must be transferred from the reactor?
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Explain the effect of temperature of langmuir isotherm?
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Calculate the entropy of the process of freezing of benzene under 1 atm pressure in 2 cases
a. Reversible solidification at 50C knowing the freezing temperature of benzene is -2370 cal/mol.
b. Non-reversible freezing condensation at -50C.
Knowing the heat capacity of solid and liquid benzene is 30,3 and 29,3 cal/mol.K espectively.)
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Gaseous feed to the reactor composition 75% butane ( C3H8) and 25% hydrogen ( percent by volume) is burned in a reactor with 25% excess air. The percentage conversion of butane to CO2 95% and the balance to CO. Calculate the mole composition of the stack
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why cant we apply catalytic combustion to particulate matter laden gases?
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Based on different size of droplets as calculated/ reported in part 2, how long they will take to settle down on surface. Use three different size (max, average, min) (Fluid mechanics might help you)
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Q. a) Enlist excavating equipment. Draw a neat sketch
and explain working of any two excavating equipment.
b) Write short note on
i) Crawler Tractor.
ii) Wheel Tractor.
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Could you please do a unit analysis on Riedel and Antoine equation to determine the units of the empirical coefficients. Pressures in kPa and temperatures in Kelvin.
Riedel equation : lnP(T) = Ar + Br/T + Cr.ln(T) + Dr.T6
Antoine equation: lnP(T) = Aa - Ba/(Ca+T)
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I know this is multiple questions, I am going to post it six times each time asking for a different question, but I also know these questions build off each other so I couldn't just post the prompt and one question without the others.
Please answer question 4 (or it all :D)
An existing industrial wastewater treatment plant fails to treat
a new chemical, pentachlorophenol, leaving the facility in its
waste stream. A concentration of 100 μg/L pentachlorophenol now
passes through the wastewater treatment plant and is released into
the Willimantic River (a class B water) that is stocked with trout.
UConn draws drinking water from a well field adjacent to the
Willimantic River. The wastewater treatment plant releases an
average flow of 0.2 MGD into the river. The average flow of the
Willimantic River just upstream
of the treatment plant is 100 cfs (ft3/s). Based on the chemical
nature of pentachlorophenol, it adsorbs to the sediment as it
travels downstream, resulting in a loss rate of about
0.01/day.
Answer the following questions:
1. Draw the system, a control volume, and label all knowns and
unknowns, inputs, outputs, sources or transformations.
2. Identify the regulations that apply to the contaminant in this
scenario and state the specific regulation and the maximum
concentration that should not be exceeded to protect aquatic life
and human health.
3. What are the risks posed by the contamination in this system?
Identify all concerns you may have given the contaminant and the
exposure in the environment. Justify this based on research on how
the contaminant behaves in the environment and how people use the
river.
4. Calculate the maximum concentration of pentachlorophenol
in the stream right where it enters the Willimantic River. Draw
what the concentration (y-axis) would be in the stream vs. distance
and vs. time (x-axis). Estimate and justify any other parameters
you may need.
5. Estimate at what distance downstream will the contaminant
concentration meet the aquatic life criteria?
6. Research and explain two treatment processes that could be
installed at the treatment plant to reduce the pentachlorophenol
concentration. Explain the process and why it works for this
particular chemical.
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