Abstract
Demineralization and desulphurization of high sulphur coal from Assam (Makum Coal fields), India was investigated using aqueous sodium hydroxide followed by hydrochloric acid treatment. Compared to the alkali and acid alone, successive treatments with the alkali and acid resulted in significant removal of mineral matters and sulphur from the coal. Demineralization and desulphurization were found to increase with the increase in alkali concentration. Alkali treatment resulted in formation and precipitation of sodium aluminosilicate, which subsequently undergoes decomposition and solubilization in presence of acid. It is possible to remove 43–50% of the ash, total inorganic sulphur and around 10% organic sulphur from the coal by treatment with 16% sodium hydroxide solution followed by 10% hydrochloric acid.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
