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http://dx.doi.org/10.3795/KSME-B.2012.36.7.675

Char Oxidation Characteristics of Ashless Coal in Drop Tube Furnace  

Kim, Sang-In (School of Mechanical Engineering, Pusan Nat'l Univ.)
Lee, Byoung-Hwa (Pusan National University, Pusan Clean Coal Center)
Lim, Ho (School of Mechanical Engineering, Pusan Nat'l Univ.)
Yu, Da-Yeon (School of Mechanical Engineering, Pusan Nat'l Univ.)
Lee, Si-Hyun (Korea Institute of Energy Research (KIER))
Jeon, Chung-Hwan (School of Mechanical Engineering, Pusan Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.7, 2012 , pp. 675-681 More about this Journal
Abstract
The char oxidation characteristics of ashless coal with a relatively low ash content and high heating value were experimentally investigated at several temperatures (from $900^{\circ}C$ to $1300^{\circ}C$), in various oxygen concentrations (from 10% to 30%) under atmospheric pressure in a drop tube furnace. The char reaction rate was calculated from the exhaust gas concentrations (CO, $CO_2$) measured by FT-IR, and the particle temperature was measured by the two-color method. In addition, the activation energy and pre-exponential factor of ashless coal char were also calculated based on the Arrhenius equation. The results show that higher temperature and oxygen concentration result in a higher reaction rate of ashless coal, and the activation energy of ashless coal char is similar to that of bituminous coal.
Keywords
Ashless Coal Char; Char Oxidation; Particle Temperature; Activation Energy;
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