Title of article :
Alkali Leaching of Indian Coal for Ash Reduction
Author/Authors :
Singh, Jatinder Pal Mechanical Engineering Department - Thapar Institute of Engineering and Technology - Patiala - Punjab, INDIA , Mohapatra S.K. Mechanical Engineering Department - Thapar Institute of Engineering and Technology - Patiala - Punjab, INDIA , Singh, Gurprit Mechanical Engineering Department - Thapar Institute of Engineering and Technology - Patiala - Punjab, INDIA , Kumar, Satish Mechanical Engineering Department - National Institute of Technology - Jamshedpur - Jharkhand, INDIA , Singh, Mani Kanwar Mechanical Engineering Department - Chandigarh University - Gharuan - Punjab, INDIA
Abstract :
Coal is a major source of energy. The available Indian coal quality is very poor having
very high ash content and low calorific value. Indian coal generates a large quantity of ash as a by-product of
combustion. The objectives of the present study were to reduce the ash content of coal to produce ultra-clean
coal. The coal was treated with a dual chemical leaching process consisting of NaOH followed by HCl.
During experiments, the concentration of NaOH was varied from 2.5 to 10 M with 1.4 N HCl. Effect of
shaking speed and time was analysed at 0, 50, 100, 150 and 200 rpm and 1, 2, 3 and 4 hours respectively.
After chemical leaching, the ash content was reduced from 35.33 to 0.98% in the ultra-clean coal.
The concentration of alkali, shaking speed and time of duration were found as highly influencing
parameters for the reduction of ash content in the coal. Moreover, the current study should result
in a better option for the removal of ash content from low-rank Indian coals.
Keywords :
Low-grade coal , Ultra-clean coal , Ash content , Chemical leaching , Coal
Journal title :
Astroparticle Physics
