Boiler Briquette Coal versus Raw Coal: Part I-Stack Gas Emissions.

Journal Article

Stack gas emissions were characterized for a steam-generating boiler commonly used in China. The boiler was tested when fired with a newly formulated boiler briquette coal (BB-coal) and when fired with conventional raw coal (R-coal). The stack gas emissions were analyzed to determine emission rates and emission factors and to develop chemical source profiles. A dilution source sampling system was used to collect PM on both Teflon membrane filters and quartz fiber filters. The Teflon filters were analyzed gravimetrically for PM10 and PM2.5 mass concentrations and by X-ray fluorescence (XRF) for trace elements. The quartz fiber filters were analyzed for organic carbon (OC) and elemental carbon (EC) using a thermal/optical reflectance technique. Sulfur dioxide was measured using the standard wet chemistry method. Carbon monoxide was measured using an Orsat combustion analyzer. The emission rates of the R-coal combustion (in kg/hr), determined using the measured stack gas concentrations and the stack gas emission rates, were 0.74 for PM10 , 0.38 for PM25 , 20.7 for SO2 , and 6.8 for CO, while those of the BB-coal combustion were 0.95 for PM10 , 0.30 for PM2 5 , 7.5 for SO2 , and 5.3 for CO. The fuel-mass-based emission factors (in g/kg) of the R-coal, determined using the emission rates and the fuel burn rates, were 1.68 for PM10 , 0.87 for PM25 , 46.7 for SO2 , and 15 for CO, while those of the BB-coal were 2.51 for PM10 , 0.79 for PM2.5 , 19.9 for SO2 , and 14 for CO. The task-based emission factors (in g/ton steam generated) of the R-coal, determined using the fuel-mass-based emission factors and the coal/ steam conversion factors, were 0.23 for PM10 , 0.12 for PM2.5 , 6.4 for SO2 , and 2.0 for CO, while those of the BB-coal were 0.30 for PM10 , 0.094 for PM2.5 , 2.4 for SO2 , and 1.7 for CO. PM10 and PM2.5 elemental compositions are also presented for both types of coal tested in the study.

Full Text

Duke Authors

Cited Authors

  • Ge, S; Bai, Z; Liu, W; Zhu, T; Wang, T; Qing, S; Zhang, J

Published Date

  • April 2001

Published In

Volume / Issue

  • 51 / 4

Start / End Page

  • 524 - 533

PubMed ID

  • 28072241

Pubmed Central ID

  • 28072241

Electronic International Standard Serial Number (EISSN)

  • 2162-2906

International Standard Serial Number (ISSN)

  • 1096-2247

Digital Object Identifier (DOI)

  • 10.1080/10473289.2001.10464293

Language

  • eng