https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 Thermogravimetric study and modeling for the drying of a Chinese lignite https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18735 Sat 24 Mar 2018 08:02:46 AEDT ]]> A kinetic study of microwave and fluidized-bed drying of a Chinese lignite https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18400 Sat 24 Mar 2018 07:52:34 AEDT ]]> Thermogravimetric study of the combustion of Tetraselmis suecica microalgae and its blend with a Victorian brown coal in O₂/N₂ and O₂/CO₂ atmospheres https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28825 Sat 24 Mar 2018 07:38:27 AEDT ]]> Intrinsic kinetics of CO₂ gasification of a Victorian coal char https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24466 -1 for the CO₂ gasification of Morwell coal char. With 2 % Ca loading, the activation energy increased to 204.53 kJ mol-1 due to lowering of the surface area. However, an order of magnitude increase in the pre-exponential factor indicated an increase in active reaction sites for the 2 % Ca-loaded sample, resulting in a net increase in gasification rate. 5 % Ca loading and 2 % Fe loading proved to be less effective in increasing the gasification rate. Analysis of the TG outlet gas also proved the effectiveness of 2 % Ca loading as a gasification catalyst.]]> Sat 24 Mar 2018 07:17:24 AEDT ]]> Chemical structure changes accompanying fluidized-bed drying of Victorian brown coals in superheated steam, nitrogen, and hot air https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23725 –1), aliphatic hydrogen (3000–2800 cm–1), and carbonyl and aromatic carbon (1850–1500 cm–1) adsorption regions. Following air drying, the IR adsorption of aliphatic structures decreased significantly, indicating that oxidation reaction mainly takes place on these structures. Carbonyl and carboxyl groups decreased up to 130 °C by 25.9% and 23.9%, respectively, and then significantly increased at higher temperatures due to oxidation. Drying of brown coals in nitrogen resulted in a significant increase in their aromaticity and a lower concentration of oxygen-containing functional groups. The loss of oxygen was confirmed by measuring the O/C ratio of raw and dried samples. The O/C ratio decreased by 30.8% and 40.7% for LY and YL coals, respectively, after drying at 200 °C for 10 min. Superheated steam fluidized-bed drying of both LY and YL coals showed the breakage of some weak aliphatic C–H structures. The decrease in adsorption of hydroxyl, carboxyl, and carbonyl groups leads to loss of oxygen in both LY and YL steam-dried coals. Superheated steam drying of brown coals showed only minor changes to the coal organic structure as the aromatic carbon content remained relatively unchanged and aliphatic structures decreased negligibly.]]> Sat 24 Mar 2018 07:16:57 AEDT ]]>