Preliminary evaluation of sulfur variability in low-sulfur coals from selected mines. Contract report
Technical Report
·
OSTI ID:7176916
Data on the variability of sulfur content and heating value of coal have been obtained from several coal and utility companies. These data have been analyzed to estimate the mean, standard deviation, and the frequency distribution of weight percent sulfur (dry basis) and the impact of this variability on the required average sulfur content to comply with an emission regulation. In order to assess the implications of sulfur variability for compliance with emission regulations, such as those specified by State Implementation Plans(SIP) and New Source Performance Standards (NSPS), the relative standard deviation (RSD) of weight percent sulfur was estimated as a function of the amount of coal sampled and the number of composite samples for the specified averaging period. These RSD's were used to estimate the required average sulfur content to yield 95 and 99 percent compliance with the emission limitation of 1.2 lb SO2/MM Btu. The detailed computations are given for two sizes of power plants, 500 MW and 25 MW (250 MM Btu/hour, the smallest plant covered by the NSPS). As the percent of compliance increases the required average sulfur content decreases and rapidly approaches sulfur levels for which the availability of uncleaned coal to comply with the NSPS would approach zero.
- Research Organization:
- PEDCO-Environmental, Inc., Cincinnati, Ohio (USA)
- OSTI ID:
- 7176916
- Report Number(s):
- PB-275000
- Country of Publication:
- United States
- Language:
- English
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