Browsing by Subject "Coal demineralisation"

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The effect of acid demineralising bituminous coals and de-ashing the respective chars on nitrogen functional forms

Phiri, Zebron; Everson, Raymond C.; Neomagus, Hein W.J.P.; Wood, Barry J. (Elsevier, 2017)

An opportunity presented itself to compare changes in nitrogen functional forms brought by the acid treatment of South African bituminous coals and their respective chars. X-ray photoelectron spectroscopy (XPS) was used ...
The experimental evaluation of nitrogen transformation in South African coal chars and the concomitant release of nitrogenous species

Phiri, Z. (North-West University, 2018)

The effect of typical South African (SA) coal properties on nitrogen functional transformation and release were examined in the course of pyrolysis in a fluidised bed (FB) and drop-tube furnace (DTF). Chars were generated ...