Order-of-Magnitude Estimation of the Quantities of PCDD/F Formed in Underground Coal Gasification (UCG) Flares

The technology of underground coal gasification to produce synthesis gas requires a flare to dispose of vented surplus gas. Since any coal seam will contain chlorine, there is the potential to produce dioxins (PCDD/F) in the flare flame, provided that chlorinated products are released during the gas...

Full description

Saved in:
Bibliographic Details
Published inCombustion science and technology Vol. 189; no. 11; pp. 1849 - 1858
Main Author Stanmore, B. R.
Format Journal Article
LanguageEnglish
Published New York Taylor & Francis 02.11.2017
Taylor & Francis Ltd
Subjects
Chlorination
Chlorine
Coal
Coal gasification
Dioxin (PCDD/F)
Dioxins
Flare
PCDD
Synthesis gas
Underground gasification
Online AccessGet full text

Cover

More Information
Summary:The technology of underground coal gasification to produce synthesis gas requires a flare to dispose of vented surplus gas. Since any coal seam will contain chlorine, there is the potential to produce dioxins (PCDD/F) in the flare flame, provided that chlorinated products are released during the gasification reactions. Because of the sulphur present in coals, it is unlikely that significant amounts of heterogeneous (solid phase) PCDD/F will form. Using an established model for dioxin formation, an estimate is made of the likely amount of homogeneous (gas phase) PCDD/F generated in the flame. The result suggests that any release to air will be well below international regulatory limits.
ISSN:0010-2202
1563-521X
DOI:10.1080/00102202.2017.1333985