From: peter@tsto.co.uk   
      
   On 28/04/18 18:15, Bret Cahill wrote:   
   > Bunker or 6 oil is 5% sulfur and 3% of CO2 from petroleum comes from ships   
   burning this filthy cheap fuel -- 1/2 the cost of 2 oil -- in 2 stroke diesel   
   engines.   
   >   
   > The petroleum ratio is something like 670 tons of CO2 to 1 ton SO2.   
      
   What's a "petroleum ratio" in this context?   
      
   Assuming no. 6 oil of 5% sulphur (though 2-3% is a more common figure   
   for no. 6, and by treaty the maximum sulphur content of marine heavy   
   fuel oil used in the open oceans is 3.5%, 0.1% near coasts), then the   
   ratio of CO2 to SO2 produced by complete combustion would be just under   
   30 tons of CO2 to 1 ton SO2.   
      
   (5% sulphur oil would be about 14% hydrogen, 80% carbon, 5% sulphur -   
   converting to oxides would give 295% CO2 and 10% SO2)   
      
   https://xkcd.com/386/   
      
   -- Peter Fairbrother   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)