Questions and Answers of Numerical Methods With Chemical Engineering Applications

In a steam power plant, coal is burned at the rate of 50 lbm/min. The percentage of ash in the coal is 9% by mass. The combustion of coal takes place in a fluidized bed reactor and the ash in the
2-Mercaptoethanol (C2H6OS) is produced by reacting ethylene oxide (C2H4O) with hydrogen sulfide (H2S) as per the following reaction equation.The reaction takes place in the presence of Thiodiglycol
Chlorobenzene is produced by direct chlorination of benzene. However, a parallel reaction that produces dichlorobenzene hexachloride also occurs. The parallel reactions are shown here. The single
Methanol can be produced by the reaction of carbon dioxide and hydrogen as per the following reaction: The fresh feed available is 500 kmol/hr with 2% inerts and the rest being the reactants in
In an instant coffee plant, 10000 kg/hr of coffee extract containing 20% solids is concentrated using a vacuum evaporator which is designed to produce a concentrated extract with 50% solids suitable
A process requires a supply of 2,500 gal/hr of 12% (by mass) hydrochloric acid solution and it can tolerate a variation of ±0.15% in the concentration of hydrochloric acid. A system with a buffer
The water gas shift reaction (WGSR) is the reaction of carbon monoxide with steam to produce carbon dioxide and hydrogen and it is used in the production of hydrogen for industrial applications. 600
A liquid hydrocarbon fuel has a mass composition of 82% carbon and 18% hydrogen. The specific gravity of the fuel is 0.72. Calculate the kmol of air required for the complete combustion of 1 liter of
1800 lbm/min of steam at 600 °F and 300 psia expands through a turbine to a final pressure of 10 psia. The isentropic efficiency of the turbine is 90% and the mechanical efficiency of the turbine is
After undergoing the first stage of expansion, steam at 1 MPa is reheated to 500 °C. The reheated steam expands through the second stage turbine to a final pressure of 20 kPa. Determine the enthalpy
Waste heat recovery measures in a process facility results in the availability of superheated steam at 200 psia and 700 °F. The available steam expands in a turbine to a final pressure of 10 psia.
A binary mixture of propane and butane exists in equilibrium at standard atmospheric pressure of 101 kPa. The mole fraction of propane in the liquid phase is 0.30. The normal boiling points (NBPs) of
At 30 °C, the Henry’s law constant for a 0.0001 mol/m3 aqueous solution of trichloroethylene (TCE) in equilibrium with atmospheric air is determined to be 1.2 kPa/(mol/m3). Determine the partial
Chloroform (CHCl3) and methanol (CH3OH) form a non-ideal, binary azeotropic mixture at standard atmospheric pressure and 327 K. The azeotropic composition is 65 mol% chloroform and the Antoine’s
A binary mixture of water and ethanol is flash distilled at atmospheric pressure. The feed consists of 80 mole% ethanol (component A) and 20 mole% water (component B). The equations for vapor
The relative volatility of cyclohexane with respect to water is 4.33 in the temperature range of interest. If the liquid mole fraction of cyclohexane in a binary solution of water is 0.25, calculate
Phosphorus trichloride (PCl3) reacts with chlorine gas (Cl2) to produce phosphorus pentachloride (PCl5) as per the following reversible gas phase reaction: The initial and equilibrium concentrations
For the reversible gas phase reaction: At a given temperature, the equilibrium concentrations of ammonia and nitrogen are Determine the equilibrium concentration of hydrogen. N2 + 3H2 2NH3
An oil has specific gravity (SG) of 0.90 and absolute viscosity of 15 cP. Calculate:A. the density of the oil in lbm/ft3 and kg/m3 .B. the specific weight of the oil in lbf/ft3 and N/m3 .C. the
An inclined manometer is used in measuring the pressure difference between the two water tanks, A and B, as shown. The specific gravity of mercury is 13.6. Calculate the pressure difference in psi.
A bypass piping network is shown in the figure below. The velocities and the Fanning friction factors will be approximately equal in the straight pipe as well as in the bypass loop, while either one
A venturi meter is used in measuring the flow rate of oil (SG = 0.88) in a pipe with ID = 100 mm. The throat diameter of the Venturi meter is 50 mm. If the flow rate of oil is 25.24 L/s, determine
A dryer uses hot air to dry wet feed with 20% moisture content on a wet basis to a final moisture content of 10%, also on a wet basis. To accomplish this, 4225 cfm (cubic feet per minute) of air at