NH^sub 3^ Formation and Destruction during the Gasification of Coal in Oxygen and Steam

This study was conducted to investigate the formation and destruction of NH... during the gasification of coal in atmospheres containing O... and steam. A Victorian brown coal was gasified in a novel bench-scale fluidized-bed/fixed-bed reactor at 800 ...C in atmospheres containing 2000 ppm O..., 15%...

Full description

Saved in:
Bibliographic Details
Published inEnvironmental science & technology Vol. 41; no. 15; p. 5505
Main Authors Mckenzie, Lachlan J, Fu-Jun, Tian, Chun-Zhu, Li
Format Journal Article
LanguageEnglish
Published Easton American Chemical Society 01.08.2007
Subjects
Coal
Coal gasification
Fluidized bed combustion
Nitrogen
Oxygen
Studies
Water
Online AccessGet full text

Cover

More Information
Summary:This study was conducted to investigate the formation and destruction of NH... during the gasification of coal in atmospheres containing O... and steam. A Victorian brown coal was gasified in a novel bench-scale fluidized-bed/fixed-bed reactor at 800 ...C in atmospheres containing 2000 ppm O..., 15% H...O, or 2000 ppm O... + 15% H...O. A NH... standard gas was also used to study the destruction of NH... in the gas phase and through gas-solid interactions. Sand, char, and coal ash were all found to enhance the destruction of NH... An atmosphere containing O... alone does not favor the conversion of char-N into NH... but favors the destruction of NH... through various mechanisms. The introduction of H...O into the gasification system greatly favors the conversion of char-N into NH... and inhibits the destruction of NH... The formation and destruction of NH... in an atmosphere containing 15% H...O was similar to that in an atmosphere containing 15% H...O and 2000 ppm O..., indicating the dominant effects of steam in the formation and destruction of NH... in a gasifier. (ProQuest-CSA LLC: ... denotes formulae/symbols omitted.)
ISSN:0013-936X