ELEM.PRIN.OF CHEM.PROCESS-ACCESS
4th Edition
ISBN: 9781119099918
Author: FELDER
Publisher: WILEY
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Textbook Question
Chapter 4, Problem 4.76P
4.7'6. Methanol is produced by reacting carbon monoxide and hydrogen. A fresh feed stream containing CO and H2 joins a recycle stream and the combined stream is fed to a reactor. The reactor outlet stream Hows at a rate of 350 mol/min and contains 10.6 wt% H2,64.0 wt% CO. and 25.4 wt5? CTLOH (Notice that those are percentages by mass, not mole percents.) This stream enters a cooler in which most of the methanol is condensed. The liquid methanol condensate is withdrawn as a product, and the gas stream leaving the condenser—which contains CO, H2, and 0.40 mole% uncondensed CH3OH vapor—is the recycle stream that combines with the fresh feed.
- Without doing any calculations, prove that you have enough information to determine (i) the molar flow rates of CO and H2 in the fresh feed, (ii) the production rate of liquid methanol, and (iii) the single-pass and overall conversions of carbon monoxide. Then perform the calculations.
- After several months of operation, the flow rate of liquid methanol leaving the condenser begins to decrease. List at least three possible explanations of this behavior and state how you might check the validity of each one. (What would you measure and what would you expect to find if the explanation is valid?)
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Students have asked these similar questions
For each set of measurements below, calculate the Grubbs statistic, G, look up the appropriate
critical value of G from Table 4.6, and determine whether the Grubbs test supports discarding the
first value in the list at the 95% level of confidence.
a) 106.0, 165.0, 167.5, 170.5, 163.5, 170.7
(Geale -2.028; Gerit 1.822; yes, the Grubbs test supports discarding 106.0)
b) 214.8, 263.0, 229.9, 236.9, 221.8, 230.8, 241.1
c) 357.0, 309.3, 304.9, 314.8, 305.8, 295.3, 284.7, 299.5
TABLE 4-6
Critical values of G
for rejection of outlier
Number of
observations
otsulsve os
Tenos
nagsibarito G to buboxy
(95% confidence)
456
1.463
1.672
1.822
7
1.938
8 upa
2.032
9
2.110
10
2.176
- 1 12 15 20
11
2.234
2.285
2.409
2.557
#1 A irreversible isothermal gas-phase isomerization reaction is given as: AB. This reaction is
conducted in a 400L batch reactor and 100 mol of A (NAD = 100 mol) is charged into this reactor.
The rate of reaction is determined as a function of the conversion of reactant A and the results
are given below. The temperature was constant at 500K and the total pressure was constant at
830 kPa. The entering number of moles of species A is 100 mol. Calculate the time necessary to
achieve 80% conversion.
0
0.1
0.2
0.4
-TA (mol/m³.s)
0.45
0.37
0.3
0.195
0.6
0.113
0.7
0.079
0.8
0.05
#3 A irreversible isothermal liquid-phase reaction is given as: A → B is conducted in continuous
flow systems. The rate of reaction is determined as a function of the conversion of reactant A
and the results are given below. The temperature was constant at 500K. The entering molar
flow rate of A is 0.4 mol/min.
a) If this reaction is conducted in two CSTRS in series. Calculate the required reactor volume of
each CSTRS if conversion X₁ = 0.4 and conversion X2 = 0.8.
b) If this reaction is conducted in two PFRS in series. Calculate the required reactor volume of
each PFRS if conversion X₁ = 0.4 and conversion X2 = 0.8.
c) If this reaction is conducted in a PFR followed by a CSTR. Calculate the required reactor
volume of PFR if conversion X₁ = 0.4 and of CSTR if conversion X2 = 0.8.
X
-A (mol/L.min)
0
0.1
0.2
0.4
0.6
0.7
0.8
0.45
0.37
0.3 0.195
0.113
0.079
0.05
Chapter 4 Solutions
ELEM.PRIN.OF CHEM.PROCESS-ACCESS
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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