Effect of NaOH treatment on surface properties of coal

✍ Scribed by Selim M. Senkan; E.L. Fuller Jr

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 396 KB
• Volume: 58
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(79)90070-x

✦ Synopsis

Surface properties of sub-bituminous

Wyodak and bituminous Illinois coals were examined using sorption and immersion techniques, to elucidate the effects of aqueous NaOH treatment. Sorption of non-polar gases such as CO;! and N, decreased significantly after the alkali treatment for the Wyodak coal; however, similar tests with the Illinois coal did not produce such dramatic results. Water sorption and heats of immersion into liquid water increased considerably for both coals following the NaOH treatment. It is concluded that treatment with aqueous NaOH affects the chemical and physical structure of the coal surface.