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13.2.4 $SO_2$ and $H{_2}S$ Production in a Gaseous Fuel

The rate of $SO_2$ or $H{_2}S$ production is equivalent to the rate of combustion of the fuel:


S_{\rm pl, i} = \frac{{\cal R}_{\rm cf} \; Y_{\rm S, fuel} \; M_{w,{\rm i}}}{M_{w,{\rm S}}} (13.2-8)


where $S_{\rm pl, i}$ = source of $i$ (kg/m $^3$-s), where $i = SO_2$ or $H{_2}S$
  ${\cal R}_{\rm cf}$ = mean limiting reaction rate of fuel (kg/m $^3$-s)
  $Y_{\rm S, fuel}$ = mass fraction of sulfur in the fuel

The mean limiting reaction rate of fuel, ${\cal R}_{\rm cf}$, is calculated from the Magnussen combustion model, so the gaseous fuel option for SOx formation is available only when the generalized finite-rate model is used.

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