Emission and dispersion of hydrogen sulfide gas over West Texas oil fields
Hagemann, Jon Andrew
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A study has been conducted to determine a method for estimating the total fugitive emissions of hydrogen sulfide gas from West Texas Oil fields. The Pasquill-Gifford (PG) Gaussian dispersion model was updated specifically for ground level releases of hydrogen sulfide. The validation data were taken over types of terrain similar to those found in the oil fields of West Texas. Controlled experiments were conducted by releasing known quantities of 99% pure hydrogen sulfide. The PG model was found to be non conservative by under-predicting the source strength when calculating back from a measured downwind concentration. An empirical correction was applied to the PG model. The corrected model showed that the point source strength from a petroleum, tank battery vent to be approximately 30 tons/year. The corrected PG model for hydrogen sulfide, CPGH2S model, was estimated to conservatively over-predict point source strengths by 50% from downwind concentrations measured at distances close to 30 m.