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http://dx.doi.org/10.7464/ksct.2014.20.3.321

Drying Characteristics of High Moisture Low Rank Coal using a Steam Fluidized-bed Dryer  

Kim, Gi Yeong (Graduate School of Energy Science and Technology, Chungnam National University)
Rhee, Young-Woo (Graduate School of Energy Science and Technology, Chungnam National University)
Park, Jae Hyeok (Chemical and Biomolecular Engineering, Yonsei University)
Shun, Dowon (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
Bae, Dal-Hee (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
Shin, Jong-Seon (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
Ryu, Ho-Jung (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
Park, Jaehyeon (Greenhouse Gas Laboratory, Korea Institute of Energy Research)
Publication Information
Clean Technology / v.20, no.3, 2014 , pp. 321-329 More about this Journal
Abstract
In this study, Indonesia low rank coal, which has moisture content of around 26%, is dried less than 5% by using a laboratory-scale (batch type) steam fluidized-bed dryer in order to produce the low-moisture, high rank coal. Normally, CCS (carbon capture and storage) process discharges $CO_2$ and steam mixture gas around $100-150^{\circ}C$ of temperature after regeneration reactor. The final purpose of this research is to dry low rank coal by using the outlet gas of CCS process. At this stage, steam is used as heat source for drying through the heat exchanger and $CO_2$ is used as fluidizing gas to the dryer. The experimental variables were the steam flow rate ranging from 0.3 to 1.1 kg/hr, steam temperature ranging from 100 to $130^{\circ}C$, and bed height ranging from 9 to 25 cm. The characteristics of the coal, before and after drying, were analyzed by a proximate analysis, the heating value analysis and particle size analysis. In summary, the drying rate of low rank coal was increased as steam flow rate and steam temperature increased and increased as bed height decreased.
Keywords
Low-rank coal; Steam; $CO_2$; CCS; Fluidized-bed dryer;
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Times Cited By KSCI : 5  (Citation Analysis)
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