The co-combustion performance and reaction kinetics of refuse derived fuels with South African high ash coal

K Isaac, SO Bada - Heliyon, 2020 - cell.com
This research focuses on the co-firing of low-quality coal with refuse derived fuel (RDF) as a
means to reduce the volume of waste dumped in landfill sites. The co-combustion behaviour …

Catalytic Effect of Reactive Extraneous Mineral Composites on Char and Tar Distribution during Pyrolysis of Highveld Partially Oxidized Fine-Coal Reject and Its …

K Mphahlele, RH Matjie, JR Bunt - ACS omega, 2023 - ACS Publications
In this study, the South African partially oxidized fine-coal reject (FCR), which is associated
with human health and environmental problems and sustains high disposal expenses, was …

Efficient separation of coal gasification fine slag from Texaco gasifier and microstructures and elemental characteristics of separated components

S Xiong, N Yang, F Lv, Y Zhang, W Zhang… - … Journal of Coal …, 2024 - Taylor & Francis
Coal gasification fine slag (CGFS) is one of the by-products of coal gasification process,
which is mainly composed of inorganic minerals and residual carbon. The key to realize the …

Mineralogy and petrology of chars produced by South African caking coals and density-separated fractions during pyrolysis and their effects on caking propensity

MM Tsemane, RH Matjie, JR Bunt… - Energy & …, 2019 - ACS Publications
Thermochemical processes use low-rank bituminous coal to produce steam and synthetic
gas. Caking coal particles can soften, swell, and coalesce in the South African boilers and …

Properties and reactivity of two oxidized and unoxidized South African Highveld fine coal rejects and their density-separated fractions

K Mphahlele, RH Matjie, JR Bunt… - International Journal of …, 2023 - Taylor & Francis
Fine coal reject samples (FCRs) derived from the South African (SA) feed-coal preparation
are unsuitable for gasification/combustion. In this novel investigation, two SA FCRs were …

Production of sodium-based zeolites and a potassium-containing leach liquor by alkaline leaching of South African coal fines ash

AC Collins, CA Strydom, RH Matjie, JR Bunt… - Journal of the …, 2023 - scielo.org.za
South African coal discards derived from feed coal for thermoprocesses pose human health
and environmental problems and incur high disposal costs. These issues need to be …

Interactions between kaolinite, organic matter, and potassium compounds at elevated temperatures during pyrolysis of caking coal and its density-separated fractions

R Matjie, J Bunt, W Stokes, H Bijzet, K Mphahlele… - Energy & …, 2021 - ACS Publications
Large coal agglomerates (cakes), which form in slow heating fixed-bed commercial
gasifiers, result in low carbon efficiency and carbon loss in the ash assemblage. In an earlier …

[HTML][HTML] Transformation of inherent and extraneous minerals in feed coals of commercial power stations and their density-separated fractions

R Rautenbach, R Matjie, C Strydom, J Bunt - Energy Geoscience, 2021 - Elsevier
The main objective of this work is to relate the coalescence of inherent minerals and the
fragmentation of extraneous minerals to the slagging propensities of South African …

Effect of chemical, mineralogical, and petrographic properties on the grindability of a South African Highveld coal

R Matjie, J Bunt, A Goosen, K Mphahlele… - Journal of the Southern …, 2023 - scielo.org.za
Coal properties that are associated with wear and damage of grinding equipment during
pulverization prior to combustion were investigated. A South African Highveld feed coal and …

Pyrolysis of tetralin liquefaction derived residues from lighter density fractions of waste coals taken from waste coal disposal sites in South Africa

RC Uwaoma, CA Strydom, RH Matjie, JR Bunt… - Energy & …, 2019 - ACS Publications
The lighter density (< 1.5 g/cm3) fractions produced from two waste coals sampled from the
waste coal disposal sites at thermochemical plants situated in South Africa were used as …