Show simple item record

dc.contributor.authorSehume, Thabo Z.
dc.contributor.authorStrydom, Christien A.
dc.contributor.authorBunt, John R.
dc.contributor.authorSchobert, Harold H.
dc.identifier.citationSehume, T.Z. et al. 2017. Effectivity of phenol during solvent extraction of a South African bituminous coal under mild conditions. Energy & fuels, 31(12):13655-13665. []en_US
dc.identifier.issn1520-5029 (Online)
dc.description.abstractSolvent extraction of a South African bituminous coal was carried out under mild conditions (<400 °C) with a holding time of 20 min and an initial nitrogen (N2) pressure of 6 MPa. Thermal degradation of coal with phenol results in the depolymerization of the coal, yielding coal-derived liquids and insoluble residues. The effectiveness of phenol for solvent extraction of coal within the temperature range of 300–360 °C was investigated, with a focus on the quality of the coal-derived liquids. It was found that an increase in temperature from 300 °C to 360 °C resulted in an increase in the conversion and yields of both oil and gas, and a reduction in the intermediate components (preasphaltenes + asphaltenes, PAAs). The conversion and extraction yields of hexane-soluble (HS) oils were 49.5% (daf) and 26.3% (daf), respectively (daf = dry ash-free), for thermal depolymerization reactions at 360 °C. It seems that the extraction process dissolves molecular fragments of the coal, because the infrared spectra of the coal and the extraction products are similar. The SimDis results of the coal-derived liquids (300–360 °C) indicated that the samples consisted of light vacuum gas oil (23–31 wt %), distillate fuel oil (16–30 wt %), heavy vacuum gas oil (18–34 wt %), and residual oil (3–16 wt %). These results show the potential of phenol as a solvent to extract South African bituminous coal at mild temperatures for value-added liquid fuels and add to the general knowledge of the potential utilization of the Permian-aged South African bituminous coalsen_US
dc.titleEffectivity of phenol during solvent extraction of a South African bituminous coal under mild conditionsen_US
dc.contributor.researchID20441665 - Sehume, Thabo Zacharia
dc.contributor.researchID20682972 - Strydom, Christiena Adriana
dc.contributor.researchID20164200 - Bunt, John Reginald

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record