https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46916 2) capture using reactive silicate-based mineral slurries exposed to a gas flow containing CO₂. The model is validated through experimentation using thermally conditioned or heat-activated serpentinite (hydrous metamorphic ultramafic rock) in a laboratory-scale bubble column reactor. The kinetic model developed advocates a holistic modeling approach, offering an expanded view of the dissolution of heat-activated serpentinite under lean CO₂ conditions, in which the gas–liquid–solid system and its influence on CO₂ dissolution and the coupled dissolution behavior of the material are considered in their entirety. Modeling incorporates the characteristics of the gas to liquid phase interaction, such as CO₂ composition of the gas phase and interfacial area, the composition of the aqueous phase and its temperature, and compositional and morphological features of the solid. We demonstrate that such an approach is essential when considering proton-limiting conditions that are especially relevant to mineral dissolution under dilute CO₂ conditions in short reaction timeframes. The model is of particular relevance to the use of reactive silicate-based minerals for the aqueous capture of CO₂ from dilute CO₂ gas streams. The model as developed can be used to predict CO₂ capture using heat-activated serpentinite slurries for a given set of operating conditions and should be adaptable for use with other alkaline materials of defined reactivity in similar or varying reaction settings by adequately specifying reaction conditions.]]> Thu 08 Dec 2022 08:53:04 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:18833 Sat 24 Mar 2018 08:03:17 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20543 Sat 24 Mar 2018 08:02:40 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19815 3CH₂F) in argon bath gas has been studied in a dielectric barrier discharge reactor at atmospheric pressure and in the absence of oxygen and nitrogen. The reaction resulted in the formation of a polymeric solid fraction and the noncrosslinked properties of this material assisted in its characterization by solution state ¹³C and ¹⁹F nuclear magnetic resonance spectroscopy. Gel permeation chromatography revealed that the polymers include low (number average molecular weight, Mn values between 900 and 3000 g mol^-1) and high (Mn approximately 60000 g mol^-1) molecular weight fractions. A detailed polymerization mechanism is proposed, based on the published literature and the findings of the current investigation.]]> Sat 24 Mar 2018 07:56:56 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26110 –1 (the applied voltage range was 14.1 to 15.2 kV, peak–peak). The electrical discharge was characterized and found to be a slight modification of filamentary discharge toward a diffuse discharge due to the presence of the relatively low concentration of CCl₃F and CH₄ (less than 2% each) in argon. A reaction mechanism is proposed describing the formation of gas phase, as well as polymeric products.]]> Sat 24 Mar 2018 07:39:53 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30335 -1 to 13 kJ L^-1. A reaction mechanism is proposed explaining the formation of gaseous as well as polymeric products.]]> Sat 24 Mar 2018 07:31:46 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:25535 Sat 24 Mar 2018 07:26:03 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:28906 −1 (applied voltage range is 13.4–14.8 kV, peak-peak). The relatively low input feed concentration of CCl₂F₂ and methane in the argon bath gas modifies the strong filamentary appearance of the pure argon discharge to a more diffuse appearance.]]> Sat 24 Mar 2018 07:25:59 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24020 -1 feed rate reduces the conversion of CF₃CH₂F from 74.5% to 46.8% and increases the formation of HF from 1500µmolh^-1 to 2640µmolh^-1. The effect of methane addition on the electrical discharge and the reaction pathways are discussed.]]> Sat 24 Mar 2018 07:16:44 AEDT ]]>