Coal that is washed, ground into fine particles, then chemically treated to remove sulfur, ash, silicone, and other substances; usually briquetted and coated with a sealant made from coal.
ULTRA CLEAN COAL (UCC)
Meaning of ULTRA CLEAN COAL (UCC) in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012