Browsing by Subject "Reactivity"
Now showing items 1-7 of 7
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Changes to the organic functional groups of an inertinite rich medium rank bituminous coal during acid treatment processes
(Elsevier, 2011)A South African inertinite rich medium rank bituminous coal was subjected to a series of acid treatment steps using concentrations of HF and HNO3 ranging between 1.5 and 4 M, temperatures between 65 and 80 °C and reaction ... -
CO2 reactivity of briquettes derived from discard inertinite-rich Highveld coal using lignosulphonate and resin as binders
(SAIMM, 2019)South African collieries generate approximately 31 Mt of fine and ultrafine coal annually, with the majority of the ultrafine fraction discarded in slurry ponds and underground workings. Use can be made of this energy ... -
Green coal development for application in fixed-bed catalytic gasification
(SAIMM, 2018)A novel ‘green coal’ product formulation has recently been developed and the utilization concept tested at the North-West University coal research laboratories. Hydrothermal liquefaction was used to produce bio-oil ... -
Impact of beryllium reflector ageing on Safari–1 reactor core parameters
(North-West University, 2011)The build–up of 6Li and 3He, that is, the strong thermal neutron absorbers or the so called "neutron poisons", in the beryllium reflector changes the physical characteristics of the reactor, such as reactivity, neutron ... -
A metallurgical coke replacement derived from torrefied wood chips pre-treated by wet oxidation
(North-West University (South Africa)., 2022)The global population is ever increasing resulting in an ever-increasing energy demand and reliance of fossil fuels which has increased over the past few decades. The production of coke relies on the availability, cost and ... -
The molecular structure of selected South African coal-chars to elucidate fundamental principles of coal gasification
(2015)Advances in the knowledge of chemical structure of coal and development of high performance computational techniques led to more than hundred and thirty four proposed molecular level representations (models) of coal ... -
An understanding of the porosity of residual coal/char/ash samples from an air-blown packed bed reactor operating on inertinite-rich lump coal
(Elsevier, 2012)The thermal treatment of coal causes a development of internal porosity of the resultant char due to the changes in the coal char pores, i.e. the opening of original closed pores, the formation of new pores, and an ...