Bunt, John Reginald; Raghoo, Monica; Schobert, Harold Harris; Strydom, Christiena Adriana
(Elsevier Science, 2011)
A South African inertinite rich medium rank bituminous coal was subjected to a series of acid treatment steps using concentrations of HF and HNO3 ranging between 1.5 and 4 M, temperatures between 65 and 80 °C and reaction ...