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How to convert p.p.m. of NoX emissions to mg/cu.metre?


In atmospheric chemistry ppm refers to ‘parts per million by volume’ so in essence 1 ppm = 10^-6 cu.metre

So V = 10^-6 cu.metres

Now use the ideal gas law (PV=nRT) to determine the number of moles (n) and multiply that by the average molecular weight of NoX to determine the mass.

This will give you the density/concentration of NoX

Notes:
M.W N2O = 44.0128 g/mol (you may want to use a MW more relevant to your problem)

This entry was posted on Monday, October 26th, 2009 at 4:22 pm and is filed under nox emission. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

One Response to “How to convert p.p.m. of NoX emissions to mg/cu.metre?”

  1. In atmospheric chemistry ppm refers to ‘parts per million by volume’ so in essence 1 ppm = 10^-6 cu.metre

    So V = 10^-6 cu.metres

    Now use the ideal gas law (PV=nRT) to determine the number of moles (n) and multiply that by the average molecular weight of NoX to determine the mass.

    This will give you the density/concentration of NoX

    Notes:
    M.W N2O = 44.0128 g/mol (you may want to use a MW more relevant to your problem)
    References :

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