Int. J. of Oil, Gas and Coal Technology   »   2017 Vol.15, No.3



Title: A new empirical correlation to model drying characteristics of low rank coals


Authors: Saban Pusat; Mustafa Tahir Akkoyunlu


Department of Mechanical Engineering, Yildiz Technical University, Besiktas, Istanbul, Turkey
Department of Energy Systems Engineering, Ereğli Faculty of Engineering and Natural Sciences, Necmettin Erbakan University, Ereğli, Konya, Turkey


Abstract: In the present study, drying of Konya-Ilgn lignite (a Turkish lignite) was modelled by using thin-layer drying models from the literature and a new empirical model. The required experimental works were carried out at different experimental conditions in a fixed bed dryer. The experimental conditions were 0.4 m/s, 0.7 m/s and 1.1 m/s drying air velocities, 70°C, 100°C and 130°C drying air temperatures, 20 mm, 35 mm and 50 mm particle sizes and 80 mm, 130 mm and 150 mm bed heights. The performance of thin-layer drying models was evaluated by a statistical method. The results showed that the proposed model achieves better results than thin-layer drying models in the literature. Therefore, the proposed empirical model may be used to represent drying characteristics of any material. [Received: June 16, 2016; Accepted: December 7, 2016]


Keywords: drying; modelling; fixed bed; thin-layer; coal; lignite; low rank coal; drying kinetics; drying characteristics; Turkey.


DOI: 10.1504/IJOGCT.2017.10003027


Int. J. of Oil, Gas and Coal Technology, 2017 Vol.15, No.3, pp.287 - 297


Submission date: 06 Jun 2016
Date of acceptance: 07 Dec 2016
Available online: 30 May 2017



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