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Evaluation and prediction of slow pyrolysis products derived from coals of different rank
(Elsevier, 2017)
When coal is heated slowly (<10 °C/min), as in the Lurgi Fixed Bed Dry Bottom (FBDB) gasification process, products formed in the pyrolysis region of the gasifier include gas liquor, condensable tar, oil and non-condensable ...
The effect of acid demineralising bituminous coals and de-ashing the respective chars on nitrogen functional forms
(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 ...
Exploring the potential of petrographics in understanding coal pyrolysis
(Elsevier, 2015)
The effects of heating manner and charring temperature on both the physical and chemical properties of coal were investigated by petrographic techniques. Six coal samples of different rank were subjected to chemical treatment ...
Coal-derived low smoke fuel assessment through coal stove combustion testing
(Elsevier, 2017)
A study was undertaken to investigate the production of low smoke fuel from coal currently used in low-income households in South Africa. Pyrolysis of large coal lumps was studied as a possible production method, and an ...
Transformation of nitrogen functional forms and the accompanying chemical-structural properties emanating from pyrolysis of bituminous coals
(Elsevier, 2018)
Characterisation of simultaneous changes in nitrogen functionalities and condensed aromatic crystallites during pyrolysis of bituminous coals was conducted. X-ray photoelectron spectroscopy (XPS) was utilised to determine ...
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, ...
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 ...
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 ...
Electrical resistivity of carbonaceous bed material at high temperature
(Springer Verlag, 2020)
This study reports the effect of high-temperature treatment on the electrical properties of charcoal, coal, and coke. The electrical resistivity of industrial charcoal samples used as a reducing agent in electric arc ...