Elementary Principles of Chemical Processes, Binder Ready Version
Elementary Principles of Chemical Processes, Binder Ready Version
4th Edition
ISBN: 9781118431221
Author: Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher: WILEY


Textbook Question
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Chapter 4, Problem 4.28P

In the commercial production of sugar (sucrose), the product crystals are washed and centrifuged to partial dryness. The crystals are then sent through a rotary dryer where they are contacted with a hot stream of air that reduces the moisture content from 1.0 wt% to 0.1 wt%. The ratio of w et sugar to inlet air fed to the dryer is 3.3 kg wet sugar/kg inlet air. The inlet air contains 1.5 mole% water.

  1. Draw and label the flowchart and do the degree-of-freedom analysis.

  • Taking a basis of 100 kg of wet sugar fed to the dryer, calculate the mass of water and its mole fraction in the air leaving the dryer.
  • If 1000 tons/day of dried sugar is to be produced, at what rate (lbn/h) is w ater evaporated from the sugar?
  • Determine the current price of sugar and estimate in S/year the current income (not the same as profit) from operation in Part (c).
  • Samples of the product crystals are analyzed routinely for water content. The mass fractions of water in the samples on successive days of operation are shown in the follow ing table.
    • Day 1 2 3 4 5 6 7 8 9 10
      .tw 0.00102 0.00097 0.00099 0.00101 0.00107 0.00099 0.00102 0.00094 0.000101 0.00098

    The quality of the product during these days of operation has been graded acceptable, and it is decided that the process will be shut down for maintenance when the value of measured value of xw is more than three standard deviations from the mean of this series of runs. What are the maximum and minimum values of xw?

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    Chapter 4 Solutions

    Elementary Principles of Chemical Processes, Binder Ready Version

    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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