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A new classification system is proposed for the morphological characterisation of char structures from biomass. These char structures are unlike the coal chars that have an established nomenclature via the International Committee of Coal and Organic Petrology (ICCP) which divides char structures into thin walled and thick walled spheres and networks, mixed dense and mixed porous, fusinoids and solids...
Because of the detrimental impacts on the biological systems and human being’s health, there is an urgent need for the development of novel materials for the removal of mercury emitted as a result of fossil fuel consumption. In this study, a novel Hg0-Temperature-Programmed Surface Reaction (Hg0-TPSR) was developed for the rapid evaluation of candidate Hg0 capture materials. A suite of non-noble metal...
This study focuses on the impacts of minerals naturally existed in different carbonaceous materials on the thermal processing of their blends with bamboo. Combustion characteristics, such as ignition temperature, peak temperature and burnout temperature, were studied using Thermogravimetric Analysis (TGA) to understand how thermal processing was affected by blending with different types of carbonaceous...
This study aimed to develop sulphided CoMo/γ-Al2O3 catalysts to recover elemental sulphur via selective reduction and to understand the catalytic mechanism of the selective catalytic reduction (SCR) of SO2 into sulphur when CO is used as the reducing agent. A series of catalysts were prepared based on Taguchi’s L9 orthogonal array and were evaluated in terms of their SO2 conversion efficiency, selectivity...
Textural features of 25 worldwide coals were studied after slow oxidation processing (0.5°Cmin −1 from 20 to 250°C in air) using oil immersion microscopy and image analysis techniques. The characterization of samples, before and after oxidation, showed important changes in vitrinite reflectance with high reactive coals, which also related to their intrinsic self-oxidation potential. The morphology...
Co-firing has become a general practice in conventional pf power plants in western countries nowadays. Knowledge on ignition behaviours, combustion characteristic and possible synergistic effects when coal is co-fired with carbonaceous wastes is of importance to operators in terms of selecting the right coal substitutes for co-firing to prevent problems such as mill fires, to maintain good flame stability,...
The benefits of blending biomass with coal for power generation include less CO 2 emissions and a reduced dependency on non-renewable fossil fuels. However, there is a need to understand the role of biomass during direct combustion and co-firing, particularly in terms of the effect of biomass use on ash slagging and fouling. A new image analysis based technique has been developed to characterise...
Gasification slag is a by-product of the coal gasification process. To achieve “zero emissions” from coal gasification technology, the environmentally safe utilization of slag by-products from gasifiers must be addressed and developed. In this study, work has been carried out to characterize residual carbon in slag together the morphological study on vitreous material present in slag. The compositions...
In this study, char image analysis techniques have been employed to investigate the morphology of chars obtained from a Drop-Tube furnace. Char image analysis results have been incorporated as inputs to a char burnout model based on Hurt's CBK model. It has been observed that the char combustion rate was strongly affected by char structural parameters and the inclusion of char morphology has led to...
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