TY - JOUR
T1 - Volatilisation of alkali and alkaline earth metallic species during the gasification of a Victorian brown coal in CO2
AU - Quyn, Dimple Mody
AU - Hayashi, Jun Ichiro
AU - Li, Chun Zhu
N1 - Funding Information:
The authors gratefully acknowledge the financial and other support received for this research from the Cooperative Research Centre (CRC) for Clean Power from Lignite (established and supported under the Australian Government's CRC program) and the New Energy and Industrial Technology Development Organisation (NEDO) in Japan. The authors also gratefully thank Professor T. Chiba and Dr. Hongwei Wu for useful discussions.
PY - 2005/8/25
Y1 - 2005/8/25
N2 - A Victorian brown coal was gasified in a bench-scale quartz fluidised-bed/fixed-bed reactor in order to study the volatilisation of Na, Ca, and Mg during devolatilisation and gasification and their roles in the reactivity of chars. It was found that the majority of Na was volatilised at 900°C under all conditions and that a Na retention limit was achieved in the char with the progress of CO2 gasification. In some cases, the presence of CO2 during devolatilisation enhanced the Na retention in the char. In contrast, the retention of Ca (and Mg) was unaffected by CO 2 during devolatilisation at 900 °C but decreased drastically upon nascent char gasification. The fundamental differences in volatilisation between the alkali and alkaline earth metallic species are discussed in this paper.
AB - A Victorian brown coal was gasified in a bench-scale quartz fluidised-bed/fixed-bed reactor in order to study the volatilisation of Na, Ca, and Mg during devolatilisation and gasification and their roles in the reactivity of chars. It was found that the majority of Na was volatilised at 900°C under all conditions and that a Na retention limit was achieved in the char with the progress of CO2 gasification. In some cases, the presence of CO2 during devolatilisation enhanced the Na retention in the char. In contrast, the retention of Ca (and Mg) was unaffected by CO 2 during devolatilisation at 900 °C but decreased drastically upon nascent char gasification. The fundamental differences in volatilisation between the alkali and alkaline earth metallic species are discussed in this paper.
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U2 - 10.1016/j.fuproc.2004.08.008
DO - 10.1016/j.fuproc.2004.08.008
M3 - Article
AN - SCOPUS:19944407943
SN - 0378-3820
VL - 86
SP - 1241
EP - 1251
JO - Fuel Processing Technology
JF - Fuel Processing Technology
IS - 12-13
ER -