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  • Material Balance Calculations - Week 1

    • Checklist - Week-1
      Students must
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    • Day-1: Material Balance - Theory - Video Page
      Students must
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    • Day-1-Material Balance - slides Book
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    • Day2: Review, Atomic Balance - Theory Page
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    • Formaldehyde from Methane - Extent of Reaction, Atomic Balance - Example Page

      2021-37-pc

      Formaldehyde is produced by the oxidation of methane in a reactor. The following two parallel reactions occur. \[ \begin {align*} \ce {CH4} + \ce {O2} &\rightarrow \ce {HCHO} + \ce {H2O} \\
      \ce {CH4} + \ce {2O2} &\rightarrow \ce {CO2} + \ce {2H2O} \end {align*} \]       Methane and oxygen are fed to the reactor. The product gases leaving the reactor include methane, oxygen, formaldehyde, carbon dioxide and water vapor.

      60 mol/s of methane enters the reactor. The molar flow rate (in mol/s) of \(\ce {CH4}\), \(\ce {O2}\) and \(\ce {CO2}\) leaving the reactor are 26, 2 and 4, respectively. The molar flowrate of oxygen entering the reactor is ________ mol/s.

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    • Combustion of Propane: Atomic Balance - Extent of Reaction - Workout Page
      1990-11-i-pc

      Pure propane (\(\ce {C3H8}\)) is burnt with an excess of air to give the following analysis of combustion products in volume percent:

      \(\ce {CO2}\) = 5.0, \(\ce {CO}\) = 3.5, \(\ce {H2O}\) = 11.4, \(\ce {O2}\) = 7.0 and \(\ce {N2}\) = 73.1
      Calculate the percentage of excess air used.

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    • Combustion of Methane - Atomic Balance - Extent of Reaction Page

      2010-33-pc

      The products of combustion of methane in atmospheric air (21% O2 and 79% N2) have the following composition on a dry basis:

      Products     Mole %
      CO2 10.00
      O2 2.37
      CO 0.53
      N2 87.10
      The ratio of the moles of CH4 to the moles of O2 in the feed stream is ______

      1. 1.05

      2. 0.60

      3. 0.51

      4. 0.45

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    • Yield, Selectivity of Reactions Page
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    • Yield and Selectivity - Dehydrogenation of Ethane Page
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    • Yield and Selectivity - Ethylene Hydration Reaction Page
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    • Theoretical and Excess Air - Example Page
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    • Combustion of Coal Page
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    • Combustion of Methanol Page
      Felder3E-4-71

      Liquid methanol (density = 792 g/L) is fed to a space heater at a rate of 12 L/h and burned with excess air. The product gas is analyzed and the following dry-basis mole percentages are determined: \(\ce{CH3OH}\) = 0.45%, \(\ce{CO2}\) = 9.03%, and \(\ce{CO}\) = 1.81%.

      1. Calculate the percentage conversion of methanol ______ , the percentage excess air fed ______ , and, mole% of water in the product gas _______.
      2. Calculate the molar flow rate of dry product gas (i.e., excluding water vapor) ______ mol/h, and that of water vapor ________mol/h.
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    • Ethylene Bromide from Ethylene Page
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    • Air Requirement of Claus Plant Page
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