https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46429 Wed 23 Nov 2022 10:47:33 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20203 Wed 11 Apr 2018 14:18:31 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55543 Wed 05 Jun 2024 09:36:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30595 Wed 04 Sep 2019 09:39:06 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43284 Thu 15 Sep 2022 12:30:31 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41250 Sat 30 Jul 2022 12:40:37 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:8320 Sat 24 Mar 2018 08:36:54 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:1965 Sat 24 Mar 2018 08:33:16 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:9983 Sat 24 Mar 2018 08:14:25 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:9981 Sat 24 Mar 2018 08:14:24 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20701 Sat 24 Mar 2018 08:06:22 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18833 Sat 24 Mar 2018 08:03:17 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20543 Sat 24 Mar 2018 08:02:40 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21793 Sat 24 Mar 2018 07:59:24 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21865 Sat 24 Mar 2018 07:59:12 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21813 –1 exothermic, respectively. Metal catalysts decompose hydroperoxides based on the Fenton-like mechanism into alkoxyl and peroxyl radicals.]]> Sat 24 Mar 2018 07:58:40 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19609 Sat 24 Mar 2018 07:58:24 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20888 Sat 24 Mar 2018 07:57:55 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17714 Sat 24 Mar 2018 07:57:25 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18347 137Cs radioactive source. Measurements were taken at different axial levels, for different chordal positions. An Eulerian–Eulerian approach was used to simulate the gas–solid flow in the stripper column. The CFD simulations predicted asymmetric solid holdup profiles emphasizing the importance of 3D simulations. The CFD model predictions matched well with the solid holdup data from experiments. The CFD model also clearly predicted the recirculation and dead zones as noticed in the experimental analysis. Local defluidization zones were also noticed near the donut baffle wall regions. The particle axial velocity was low near the baffle walls, indicating that the particles slide down on the baffle walls. The radial and axial variations of solid holdup are discussed in this work, giving new knowledge in the complex countercurrent operation. This work is first of its kind to report detailed 3D study on the hydrodynamics of stripper operation both in cold flow and in the CFD model.]]> Sat 24 Mar 2018 07:52:41 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19157 Sat 24 Mar 2018 07:52:20 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20193 Sat 24 Mar 2018 07:51:31 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19303 m) and entropies (ΔS⁰_m) of the protonation reactions were also determined by the van't Hoff equation. It was found that sarcosine can maintain a higher pKₐ than the other amino acids studied at high temperatures. We also found that the CO₂ solubilities and overall mass-transfer coefficients of 5 m' sarcosinate (moles of sarcosine per kilogram of solution) at 333-353 K are higher than those of 30% MEA at 313-353 K. These results show that some possible benefits can be produced from the use of sarcosine as a fast solvent for CO₂ absorption at high temperatures. However, the pronotation reaction of sarcosine is the least exothermic among those of all amino acids studied. This could lead to a high regeneration energy consumption in the sarcosinate-based CO2 capture process.]]> Sat 24 Mar 2018 07:49:59 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25945 Sat 24 Mar 2018 07:41:26 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27708 Sat 24 Mar 2018 07:40:10 AEDT ]]> https://ogma.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://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25623 X emissions from industrial processes. In the present study, we examined the in situ reaction of DBNBS with nitric oxide (NO), generated via the reduction of nitrite under acidic conditions at room temperature. Significant quantities of N₂ were detected during the reaction using the membrane inlet mass spectrometer (MIMS), which suggested the homolytic cleavage of the C–N bond of a diazenyl radical, formed by decomposition of a DBNBS-NO adduct is a key reaction step which occurs during trapping. Measurements by nanostructured assisted laser desorption ionization mass spectrometer (NALDI-MS) established that the primary product from the reaction was 3,4,5-trinitrobenzene sulfonate, with a molecular weight of 291.880 amu. The technique also disclosed the formation of other nitrobenzene products. The results obtained in the present study provide evidence of a new, competing reaction pathway occurring in the presence of added nitrite, whereby a nitro group is introduced in the aromatic system by coupling with a phenyl radical to yield a radical anion, which reacts readily with the electrophile N₂O₃, also present in the system.]]> Sat 24 Mar 2018 07:28:12 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26005 Sat 24 Mar 2018 07:24:35 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:4449 Sat 24 Mar 2018 07:18:06 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:4444 Sat 24 Mar 2018 07:18:05 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23738 Sat 24 Mar 2018 07:16:55 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23825 Sat 24 Mar 2018 07:12:14 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48752 Mon 29 Apr 2024 11:47:42 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51163 Mon 29 Apr 2024 11:26:01 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51161 Mon 29 Apr 2024 11:12:39 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50674 Mon 29 Apr 2024 10:51:36 AEST ]]> 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:37097 Mon 17 Aug 2020 13:30:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38019 29Si solid-state nuclear magnetic resonance (²⁹Si SS NMR), inductively coupled plasma-optical emission spectrometry (ICP-OES), and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) to characterize carbonation products and to understand the mechanism of formation and the structure of silica-rich byproducts. Thermodynamic analysis predicts the formation of magnesite and amorphous silica in the process of direct aqueous carbonation of heat-activated lizardite under the experimental conditions studied. Characterization of carbonation products disclosed the presence of magnesite, amorphous silica, and magnesium silicate phases. Analysis of supernatant solutions obtained from direct aqueous carbonation by MALDI spectroscopy showed the presence of silica polymers, which precipitate during the carbonation experiments. The precipitated amorphous silica on the surface of reacting particles was found to subsequently adsorb the dissolved magnesium (Mg) from the solution to form a magnesium silicate phase.]]> Fri 23 Jul 2021 15:47:33 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35922 1–x(ZnO)_x] is one of the promising visible light harvesting photocatalysts for overall water splitting. A series of (GaN)_1–x(ZnO)_x (0.11 ≤ x ≤ 0.33) compounds are synthesized by calcining the carbonate-type Zn/Ga-LDH precursor with and without sodium carbonate flux at 850 °C for 8–14 h under a NH₃ gas flow. The solid solutions without flux are determined to be low in crystallinity, but platelike morphology with preferred orientation could be observed. On the other hand, those with flux turn out to be better in crystallinity, and eventually exhibit significantly higher photocatalytic activity for overall water splitting under visible light irradiation than those without flux. In addition, the band gap energies can also be engineered from 2.57 to 2.72 eV by changing a synthetic parameter such as nitridation time. It is, therefore, suggested that the present new approach can offer new opportunities for designing the next generation of photocatalytic systems.]]> Fri 17 Jan 2020 09:43:08 AEDT ]]>