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Chemical Engineering
A gas feed stream containing 4.03 mole % methane and balance O2 is mixed with a pure
stream of O2. The final stream composition is 2.05 mole % methane. Determine the amount
of O2 needed to dilute the feed stream.
Hint: Assuming a basis may be helpful
stream of O2. The final stream composition is 2.05 mole % methane. Determine the amount
of O2 needed to dilute the feed stream.
Hint: Assuming a basis may be helpful
Chemical Engineering
In the selective oxidation of isobutylene to dimethyl ketone using a MoO3/U308/SiO2 catalyst it is thought that each reactant utilizes different catalytic sites. The reaction rate is controlled by surface reaction between the two adsorbed species. Postulate a sequence of elementary steps and derive the LH rate equation; sketch the rate versus pressure of isobutylene curve assuming the 0 2 pressure is large. Compare this plot to the case where both reactants compete for the same sites.
Chemical Engineering
An isothermal reversible reaction (A ↔ B) is carried out in an aqueous solution. The reaction is first-order in both directions. The forward rate constant is 1 h–1 and the equilibrium constant is 1. The feed to the plant contains 100 kg-mol/m3 of A and enters at the rate of 120 m3/h. The reactor is a stirred tank of volume 180 m3. The exit stream then goes to a separator, where the concentration of A (CA) is doubled and 30 m3/h is sent back to the CSTR in a continuous operation.
a. Find the conversion.
b. Compare this conversion with what you will get if there is no recycle.
a. Find the conversion.
b. Compare this conversion with what you will get if there is no recycle.
Chemical Engineering
The inside of a baking oven is at a temperature of 177degrees celcius. The wall of an oven is made up of 4mm thick stainless steel of thermal conductivity 15.5W/mk. Determine the heat conduction heat loss per unit area from the oven if outside temperature is at 27degrees celcius above room temperature
Chemical Engineering
Explain the disadvantages of operating reactor isothermally and what is the impact of this disadvantage?
Chemical Engineering
i got the composition of a biodiesel from CHNS analyser is
C-76.61%, H-12.34% , N- 1.33%, O-9.72% (Oxygen by mass balance from CHNS). (i think the results are of in %volume).
Sample weight - 2.69mg. DENSITY OF SAMPLE -870Kg/m3
HIgher heating value of sample -37534KJ/Kg
1. WHAT IS THE LHV OF THE SAMPLE?
2. CHEMICAL FORMULAE AND MOLECULAR MASS?
3. HOW CAN I GET THE MASS FRACTION OF EACH COMPOUND?
C-76.61%, H-12.34% , N- 1.33%, O-9.72% (Oxygen by mass balance from CHNS). (i think the results are of in %volume).
Sample weight - 2.69mg. DENSITY OF SAMPLE -870Kg/m3
HIgher heating value of sample -37534KJ/Kg
1. WHAT IS THE LHV OF THE SAMPLE?
2. CHEMICAL FORMULAE AND MOLECULAR MASS?
3. HOW CAN I GET THE MASS FRACTION OF EACH COMPOUND?
Chemical Engineering
A pump is installed to deliver water from a reservoir of surface elevation zero to another reservoir of elevation 290 ft. The 10-in-diameter suction pipe (f = 0.022) is 90 ft long, and the 8-in-diameter discharge pipe (f = 0.028) is 4900 ft long. Minor losses are neglected.
The pump characteristic at 1100 rpm is defined by:
ha = 365 – 20 Q2 (1)
where ha, the pump head, is in feet (ft) and Q, volumetric flowrate, in cubic feet per second (ft3/s).
1. Compute graphically the flowrate and the pump head at the operation conditions.
2. Repeat the question for the case of two identical pumps in series
3. Repeat the question for the case of two identical pumps in parallel.
The pump characteristic at 1100 rpm is defined by:
ha = 365 – 20 Q2 (1)
where ha, the pump head, is in feet (ft) and Q, volumetric flowrate, in cubic feet per second (ft3/s).
1. Compute graphically the flowrate and the pump head at the operation conditions.
2. Repeat the question for the case of two identical pumps in series
3. Repeat the question for the case of two identical pumps in parallel.
Chemical Engineering
A pump is installed to deliver water from a reservoir of surface elevation zero to another reservoir of elevation 290 ft. The 10-in-diameter suction pipe (f = 0.022) is 90 ft long, and the 8-in-diameter discharge pipe (f = 0.028) is 4900 ft long. Minor losses are neglected.
The pump characteristic at 1100 rpm is defined by:
ha = 365 – 20 Q2 (1)
where ha, the pump head, is in feet (ft) and Q, volumetric flowrate, in cubic feet per second (ft3/s).
1. Compute graphically the flowrate and the pump head at the operation conditions.
2. Repeat the question for the case of two identical pumps in series
3. Repeat the question for the case of two identical pumps in parallel
The pump characteristic at 1100 rpm is defined by:
ha = 365 – 20 Q2 (1)
where ha, the pump head, is in feet (ft) and Q, volumetric flowrate, in cubic feet per second (ft3/s).
1. Compute graphically the flowrate and the pump head at the operation conditions.
2. Repeat the question for the case of two identical pumps in series
3. Repeat the question for the case of two identical pumps in parallel
Chemical Engineering
100 pounds of an oleum solution containing 15.4% free SO3 is to be diluted
with water to make a 30.8% solution of H2SO4. Calculate the heat evolved.
with water to make a 30.8% solution of H2SO4. Calculate the heat evolved.
Chemical Engineering
A mixture of isomeric Diphenyl and Dichloro Tetrachloroethane is used as a
Thermic fluid in a liquid phase heating system. The thermic fluid enters an
indirect fired heater at a temperature of 450 K and leaves the heater at a temperature of 550 K. Calculate the supply of heat to the heater per kg of the liquid heated. The heat capacity of the fluid is given by the equation: CP = 1.435 + 2.19 × 10–3T, kJ/(kg K)
Thermic fluid in a liquid phase heating system. The thermic fluid enters an
indirect fired heater at a temperature of 450 K and leaves the heater at a temperature of 550 K. Calculate the supply of heat to the heater per kg of the liquid heated. The heat capacity of the fluid is given by the equation: CP = 1.435 + 2.19 × 10–3T, kJ/(kg K)
