The relationship between coal surface chromaticity and coal quality parameters: a preliminary investigation

Mikail Başyiğit*, Samet Can Özer, Abdullah Fişne*

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3 Atıf (Scopus)


Determining and continuously monitoring the quality parameters (proximate and calorific value analysis) of coal is crucial for mining, power generation, and trading purposes. Although proximate and calorific analyses are compulsory for monitoring, on-line methods continuously determine these parameters using expensive, detached equipment. Few studies predict the coal quality parameters using image analysis of the optical changes of coal surfaces. This study aimed to test the hypothesis that the surface color of coal samples might be an indicator for coal quality parameters. A novel method is proposed to estimate the ash content, fixed carbon, and gross calorific value of the given coals by analyzing the colored images of coal samples. Thirty-five coal samples from seven lower-rank coalfields in Turkey were examined through proximate and calorific analyses. For this preliminary study, they were photographed to obtain digital images, processed to calculate each pixel’s RGB codes as 8-bit values and normalized RGB codes, i.e., chromaticity values. The analyses showed that blue and red chromaticity values are highly correlated with ash content, fixed carbon content, and calorific values.

Orijinal dilİngilizce
DergiInternational Journal of Coal Preparation and Utilization
Yayın durumuKabul Edilmiş/Basında - 2021

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Publisher Copyright:
© 2021 Taylor & Francis Group, LLC.


This study was supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK) under a project (MAG-218M762) entitled “Determination of Coal Quality Parameters by Image Processing Methods”. The authors would like to thank Asst. Prof. Onur Güven for conducting gross calorific value analyses. Finally, Dr. B. K. Parekh, the editors-in-chief, and the anonymous reviewers are also thanked for constructive comments and corrections.

FinansörlerFinansör numarası
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

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