ELEMENTARY PRINCIPLES OF CHEM. PROCESS.
4th Edition
ISBN: 9781119249214
Author: FELDER
Publisher: INTER WILE
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Textbook Question
Chapter 4, Problem 4.3P
A liquid-phase chemical reaction A -* B takes place in a well-stirred tank. The concentration of A in the feed is f-AO (mol/m3), and that in the tank and outlet stream is CA (mol/nr). Neither concentration varies with time. The volume of the tank contents is V(m3) and the volumetric flow rale of the inlet and outlet streams is V (m7s). The reaction rate (the rate at which A is consumed by reaction in the lank) is given by the expression
r(mol A consumed/s) = JtVCA
where k is a constant.
- Is this process continuous, batch, or semibatch? Is it transient or steady-state?
- What would you expect the reactant concentration CA to equal if k = 0 (no reaction)? What should it approach if k —» oo (inflnitely rapid reaction)?
- Write a differential balance on A, stating which terms in the general balance equation (accumulation = input + generation — output — consumption) you discarded and why you discarded them. Use the balance to derive the following relation between the inlet and outlet reactant concentrations:
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Ex. HW. A vertical glass tube, 2cm ID & 5m long in heated
uniformly over its length. The water enter at (200-204 C) &
68.9 bar calculated the pressure drop if the flowrate 0.15
Kg/s & the power applied as a heat to the fluid is 100KW
using the homogeneous model. Given that enthalpy at inlet
temp.=0.87MJ/Kg, enthalpy saturation temp (285C)=1.26
MJ/Kg and μl=0.972*10-4 Ns/m2, μG=2.89*10-5 Ns/m2,
UG=2.515*10-2m3/Kg and the change in UG over range of
pressure=-4.45*10-4m3/Kg/bar.
4. An experimental test rig is used to examine two-phase flow regimes
in horizontal pipelines. A particular experiment involved uses air
and water at a temperature of 25°C, which flow through a horizontal
glass tube with an internal diameter of 25.4 mm and a length of 40 m.
Water is admitted at a controlled rate of 0.026 kgs at one end and air
at a rate of 5 x 104 kgs in the same direction. The density of water
is 1000 kgm³, and the density of air is 1.2 kgm. Determine the mass
flow rate, the mean density, gas void fraction, and the superficial
velocities of the air and water. Answer: 0.02605 kgs 1, 61.1 kgm³, 0.94,
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Chapter 4 Solutions
ELEMENTARY PRINCIPLES OF CHEM. PROCESS.
Ch. 4 - Prob. 4.1PCh. 4 - Rain is falling on a poorly designed 150-m" flat...Ch. 4 - A liquid-phase chemical reaction A -* B takes...Ch. 4 - A stream consisting of 44.6 mole% benzene and...Ch. 4 - Prob. 4.5PCh. 4 - A liquid mixture of acetone and water contains 35...Ch. 4 - Prob. 4.7PCh. 4 - Prob. 4.8PCh. 4 - Inside a distillation column (see Problem 4.8), a...Ch. 4 - Prob. 4.10P
Ch. 4 - In the production of soybean oil, dried and flaked...Ch. 4 - Prob. 4.12PCh. 4 - A process is carried out in which a mixture...Ch. 4 - Strawberries contain about 15wt% solids and 85wt%...Ch. 4 - Two streams flow into a 500-gallon tank. The first...Ch. 4 - A fuel distributor supplies four liquid fuels,...Ch. 4 - Prob. 4.17PCh. 4 - One thousand kilograms per hour of a mixture...Ch. 4 - L-Serine is an amino acid that often is provided...Ch. 4 - A 100 kmol/h stream that is 97 mole% carbon...Ch. 4 - A pharmaceutical product, P, is made in a batch...Ch. 4 - A liquid mixture containing ethanol (55.0 wt%) and...Ch. 4 - A stream of humid air containing 1.50 mole% H2O(v)...Ch. 4 - A liquid mixture contains 60.0 wt% ethanol (E),...Ch. 4 - Certain vegetables and fruits contain plant...Ch. 4 - Two aqueous sulfuric acid solutions containing...Ch. 4 - A paint mixture containing 25.0% of a pigment and...Ch. 4 - In the commercial production of sugar (sucrose),...Ch. 4 - Prob. 4.29PCh. 4 - A garment to protect the wearer from toxic agents...Ch. 4 - A dilute aqueous solution of H2SO4 (Solution A) is...Ch. 4 - Gas streams containing hydrogen and nitrogen in...Ch. 4 - An artificial kidney is a device that removes...Ch. 4 - The indicator-dilution method is a technique used...Ch. 4 - Prob. 4.35PCh. 4 - Gas absorption or gas scrubbing is a commonly used...Ch. 4 - The SO2 scrubbing tower described in Problem 4.36...Ch. 4 - Prob. 4.38PCh. 4 - The hormone estrogen is produced in the ovaries of...Ch. 4 - A liquid mixture containing 30.0mole% benzene (B),...Ch. 4 - Seawater containing 3.50 wt% salt passes through a...Ch. 4 - Inside the column a liquid stream flows downward...Ch. 4 - Prob. 4.43PCh. 4 - Effluents from metal-finishing plants have the...Ch. 4 - In an absorption tower (or absorber), a gas is...Ch. 4 - In the production of a bean oil, beans containing...Ch. 4 - Boilers are used in most chemical plants to...Ch. 4 - Following is a diagram of the shirt-cleaning...Ch. 4 - A drug (D) is produced in a three-stage extraction...Ch. 4 - Prob. 4.52PCh. 4 - Ammonia is oxidized to nitric oxide in the...Ch. 4 - Prob. 4.54PCh. 4 - A stream containing H2S and inert gases and a...Ch. 4 - 436. The reaction between ethylene and hydrogen...Ch. 4 - Prob. 4.57PCh. 4 - Prob. 4.58PCh. 4 - Titanium dioxide (TiCb) is used extensively as a...Ch. 4 - Prob. 4.60PCh. 4 - Prob. 4.61PCh. 4 - Oxygen consumed by a living organism in aerobic...Ch. 4 - A genetically engineered strain of Escherichia...Ch. 4 - The gas-phase reaction between methanol and acetic...Ch. 4 - Prob. 4.65PCh. 4 - Prob. 4.66PCh. 4 - Methane and oxygen react in the presence of a...Ch. 4 - Ethane is chlorinated in a continuous reactor:...Ch. 4 - Ethanol can be produced commercially by the...Ch. 4 - Prob. 4.70PCh. 4 - Solid calcium fluoride (CaF2) reacts with sulfuric...Ch. 4 - Prob. 4.72PCh. 4 - Chlorobenzene (C^HsCl), an important solvent and...Ch. 4 - A catalytic reactor is used to produce...Ch. 4 - 4.7'6. Methanol is produced by reacting carbon...Ch. 4 - Methane reacts with chlorine to produce methyl...Ch. 4 - Ethylene oxide is produced by the catalytic...Ch. 4 - Methanol is synthesized from carbon monoxide and...Ch. 4 - The fresh feed to an ammonia production process...Ch. 4 - A gas contains 75.0 wt% methane. 10.0% ethane....Ch. 4 - Five liters of liquid n-hexane and 4 liters of...Ch. 4 - Gasoline, which we will represent as having the...Ch. 4 - Prob. 4.87PCh. 4 - Natural gas containing a mixture of methane,...Ch. 4 - Propane is burned completely with excess oxygen....Ch. 4 - Prob. 4.91PCh. 4 - Prob. 4.92PCh. 4 - Liquid methanol is fed to a space heater at a rate...Ch. 4 - Prob. 4.94PCh. 4 - Prob. 4.95PCh. 4 - A fuel oil is analyzed and found to contain 85.0...Ch. 4 - Prob. 4.97PCh. 4 - Prob. 4.98PCh. 4 - Prob. 4.99PCh. 4 - 4.1 (Mt. You have been sent by the Environmental...Ch. 4 - Fuel oils contain primarily organic compounds and...
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