Browsing by Subject "Bituminous coal"

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Changes to the organic functional groups of an inertinite rich medium rank bituminous coal during acid treatment processes

Strydom, C.A.; Bunt, J.R.; Schobert, H.H.; Raghoo, M. (Elsevier, 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 ...
Solvent extraction of a bituminous coal using a sweet sorghum bagasse derived solvent

Sehume, Thabo Zacharia (North-West University (South Africa), 2019)

The aim of the first part of this study was to investigate the extractability of a South African bituminous (Waterberg) coal using phenol as a solvent at 300 °C, 320 °C, 340 °C, and 360 °C and a solvent/coal ratio of 10:1. ...
Solvent extraction of a South African bituminous coal using a model biomass-derived phenolic mixture

Sehume, Thabo Z.; Strydom, Christien A.; Bunt, John R.; Schobert, Harold H. (SACI, 2019)

A model biomass-derived phenolic mixture was investigated for its solvent ability for extraction of a South African bituminous coal at temperatures of 300–360 °C. A previous study showed that phenol gave the highest ...