Assessment of the Susceptibility of Coals to Spontaneous Heating using Wet Oxidation Potential Difference Technique
Mithilesh Kumar Rajak1, G.K Pradhan2, M.J.A.3

1Mithilesh Kumar Rajak*, Department of Mining Engineering, Amet University, Chennai, India.
2Dr. G.K. Pradhan, Department of Mining Engineering, AKS University, Satna.
3Dr. M.C.J., Department of Petroleum Engineering, Amet University, Chennai, India.
Manuscript received on September 20, 2019. | Revised Manuscript received on October 15, 2019. | Manuscript published on October 30, 2019. | PP: 6431-6437 | Volume-9 Issue-1, October 2019 | Retrieval Number: A2217109119/2019©BEIESP | DOI: 10.35940/ijeat.A2217.109119
Open Access | Ethics and Policies | Cite | Mendeley
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (

Abstract: This study is proposed to assess the susceptibility of  coals from different Indian coal mines and correlation study to fi nd out the suitability of the methods for assessment of spontaneo us heating of coals. The wet oxidation potential difference experiments (WOPD) were conducted forT20TdifferentTcoalTsamplesTcollected from different India coal mines. the coal samples were collected by channel sampling and prepared according to the Indian Standards. the energy content of all the coal samples in terms of calorific values was measured with the Bomb Calorimeter and  proximate analysis was also conducted so as to obtain volatile matter, fixed carbon, moisture content and calorific value. Correlation study was carried out to find the suitability of the methodto assess the spontaneous heating sus ceptibility of coal. Generally, Crossing Point Temperature (CPT)  method is used for assessment of spontaneous heating susceptibilit y of coal. However, this method has certain drawbacks. The results are depend re  not reproducible. More over,  it takes long hours (more than three hours) to complete the experiment. In comparison to CP, WOPD experiments only takes about 40 minutes for completion and the results are reproducible as well. From the correlation analysis, it was found that WOPD indicated a very fair accuracy for  the measure of spontaneous heating susceptibilityas it showed high correlation with the intrinsic propertiessuch as moisture and volatile matter.
Keywords: Spontaneous heating, Susceptibility, Wet Oxidation Potential Difference, Crossing Point Temperature, Proximate Analysis.