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    I need to know the formula: how to convert diesel consumption to kWh

  • #2
    Please how do I convert the following compounds from %mol to %wt:
    CO2 =0.43%mol
    H2 = 0.05%mol
    O2 = 0.52%
    N2 = 97.57%mol
    CH4 = 0.06 %mol
    CO= 0,01%mol
    and C2-C6 = 0.06%wt
    Thank you.

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    • #3
      Originally posted by AbubakarH View Post
      Please how do I convert the following compounds from %mol to %wt:
      CO2 =0.43%mol
      H2 = 0.05%mol
      O2 = 0.52%
      N2 = 97.57%mol
      CH4 = 0.06 %mol
      CO= 0,01%mol
      and C2-C6 = 0.06%wt
      Thank you.
      You need to know the average molecular weight of the mixture, which is also the molar mass, You also need the molar mass of each species.

      Two problems exist for doing this exactly. If you add up the percentages, you are missing 1.3% so you can't calculate average molecular weight from the constituents. You do not know the exact composition of the C2-C6 compounds.

      If approximations are adequate, N2 dominates the mixture, so the average molecular weight can't be wildly different from N2, 28 g/mol. Using this approximation we can estimate most of the weight percentages.

      CO2: Molar mass 44 g/mol. 0.43% x 44/28 = 0.68%
      H2: Molar mass 2 g/mol. 0.05% x 2/28 = 0.004%, etc

      Remember that the 28 g/mol for the mixture is an estimate and we have no clue what molar mass to use for the C2-C6 compounds. But the weight percentages of the high molar mass species will increase and low molar mass species will decrease.

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