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Received January 31, 2017
Accepted August 9, 2017
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Multilateral approaches for investigation of particle stickiness of coal ash at low temperature fouling conditions
1Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, P. R. China 2Department of Energy Systems Research, Graduate School, Ajou University, Woncheon-dong, Yeongtong-gu, Suwon 16499, Korea
htkim@ajou.ac.kr
Korean Journal of Chemical Engineering, December 2017, 34(12), 3102-3110(9), 10.1007/s11814-017-0217-8
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Abstract
Particle stickiness is a key parameter for increasing ash deposition in gasification process. We conducted multilateral investigations to evaluate particle stickiness of coal ash at low temperature fouling conditions through Watt and Fereday’s viscosity model, dilatometry (DIL) and laser flash apparatus (LFA) technique. Seventeen coals were employed for ash deposition experiments under gasification condition through drop tube furnace (DTF). The low viscosity not only led to increasing ash deposition behavior, but also increasing the particle size of deposited ash. From DIL analysis, the ash sintering behavior increased with increasing temperature due to increase of particle stickiness. The high amount of Fe2O3, CaO and MgO components resulted in low sintering temperature and high reduction of physical length. Through LFA analysis, the thermal conductivity increased with increasing temperature, because of increasing particle stickiness. In addition, its value was correlated with the propensity of common fouling indices.
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http://www.coaltech.com.au/LinkedDocuments/Slagging%20&%20Fouling.pdf (access : Oct. 10, 2016).
