https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:22809 Wed 11 Apr 2018 14:49:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36047 2- to depths >1,500 m. Thermally driven diagenesis, which would cause extensive loss of greigite at these depths, does not appear to be significant here. Multidomain magnetite grains dominate the magnetic mineralogy in the deepest part of the sequence, but some single-domain magnetite survives as inclusions in silicates. Fluid anomalies representing sulfate influx drive locally renewed greigite authigenesis, as do methane and ethane accumulations. In some cases, where methane is accompanied by H₂S ("sour gas"), fine-grained greigite is converted to pyrite. We term these multiple episodes of enhanced magnetic mineral alteration "punctuated magnetic mineral diagenesis." Despite both progressive and punctuated magnetic mineral diagenesis, enough depositional remanence survives to allow recognition of the magnetostratigraphy to 1,320 m below seafloor.]]> Thu 30 Jan 2020 16:34:09 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41059 Mon 25 Jul 2022 15:45:25 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42241 Fri 26 Aug 2022 09:43:17 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38020 3). CaO is then used to simultaneously oxidize VAM (methane concentrations of 0.1–1 vol % in air) and capture carbon dioxide (CO₂) produced to form CaCO3. The two cycles can be performed in a single reactor, or the process can be performed continuously in dual interconnected reactors. Preliminary experiments on the SDL process have previously been performed at laboratory scale. In this study, further laboratory-scale studies were conducted in conjunction with pilot-scale SDL investigations in a single 1 m³/s fluidized bed reactor. The effect of inventory size (1–2 tonnes of CaCO₃), operating temperature (565–700 °C), and flow rate (1–1.7 m³/s) on methane conversion was investigated. At temperatures of 600 °C and above, >99.5% methane conversion was achieved for all inventory sizes and flow rates examined. At temperatures of 565 and 575 °C, 41 and 70% methane conversions were achieved, respectively. VAM fluctuation experiments were performed, and it was shown that a fluid bed can act as a thermal mass to reduce fluctuations in the bed temperature as the VAM concentration changes.]]> Fri 23 Jul 2021 15:47:37 AEST ]]>