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Reduction of caking propensity in large (millimeter-sized) South African coal particles with potassium carbonate impregnation to expand fixed- and fluidized-bed gasification feedstock suitability
(ACS, 2015)
The caking propensity of coal causes challenges in combustion, gasification, and fluidized-bed applications, where this property limits coal selection. Certain gasifiers are fitted with mitigation technologies such as ...
The effect of acid washing on the pyrolysis products derived from a vitrinite-rich bituminous coal
(Elsevier, 2015)
Extensive characterization of the pyrolysis products, derived from raw and acid washed samples of a vitrinite-rich South African bituminous coal is reported. Pyrolysis experiments were carried out with use of a modified ...
The effect of added minerals on the pyrolysis products derived from a vitrinite-rich demineralised South African coal
(Elsevier, 2016)
A better understanding of the behaviour of the inorganic matter present in coal will assist in more cost-effective operations and more consistency in product yield and composition during thermal processing. In this study, ...
Modeling the nonisothermal devolatilization kinetics of typical South African coals
(ACS, 2014)
Multicomponent model fitting was conducted in order to evaluate the devolatilization rate behavior of four typical
South African coals, with the aid of nonisothermal thermogravimetry. Rate evaluation was conducted at four ...
Chemical and structural characterization of char development during lignocellulosic biomass pyrolysis
(Elsevier, 2017)
The chemical and structural changes of three lignocellulosic biomass samples during pyrolysis were investigated using both conventional and advanced characterization techniques. The use of ATR-FTIR as a characterization ...
The transient swelling behaviour of large (-20 + 16 mm) South African coal particles during low-temperature devolatilisation
(Elsevier, 2014)
In order to predict coal behaviour during certain utilisation processes, and to improve and develop coal conversion technologies, it is important to understand the swelling behaviour and plastic properties of coal. X-ray ...
Elucidation of the structural and molecular properties of typical South African coals
(ACS, 2013)
Advanced analytical techniques were performed on four South African coals, three noncoking and one coking,
containing different maceral contributions (vitrinite contents ranging between 24 and 66 vol %, m.m.f.b.). ...
The carbon dioxide gasification characteristics of biomass char samples and their effect on coal gasification reactivity during co-gasification
(Elsevier, 2018)
The carbon dioxide gasification characteristics of three biomass char samples and bituminous coal char were investigated in a thermogravimetric analyser in the temperature range of 850–950 °C. Char SB exhibited higher ...
Significance of coal properties on the caking degree of coarse coal particles mined at Limpopo Province, Republic of South Africa
(Taylor and Francis, 2020)
In this paper, a comprehensive coal property (chemical, mineralogical, physical, and petrographic) study was conducted using a caking coal from South Africa, density cuts and pyrolyzed samples to understand the % coal ...
Transport properties of chitosan membranes for zinc (II) removal from aqueous systems
(Elsevier, 2017)
Chitosan materials that were prepared from different sources of fishery waste were subsequently characterized and the influence of molecular weight (Mw) and degree of deacetylation (DDA) on the chitosan-acetic acid solution ...