Electrochemistry of carbonaceous materials: 2. Anodic electroactivity of coal slurries in 85% phosphoric acid media

✍ Scribed by Renato Tomat; Romeo Salmaso; Sandro Zecchin

• Book ID: 103095740
• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 383 KB
• Volume: 71
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(92)90039-q

✦ Synopsis

Current-potential curves of suspended coal (Sulcis basin, Sardinia, Italy) in 85% H,PO, were taken on a platinum electrode at 100°C. Anodic current in the potential range of O-1.5 V versus saturated calomel electrode was due to some humic acid-type substances released by coal in the electrolyte. The leaching of organic matter increased with the lowering of the particle dimensions, and the related oxidation currents attained stable values even during slurry formation. Current-potential curves were still unchanged when coal was filtered off from the susnension.

Previous washing of ground coal with diluted mineral acids, including H,PO,, did not disskve any significant electrochemical activity of the coal sample examined.