https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33929 Wed 23 Jan 2019 15:33:53 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:4530 Wed 11 Apr 2018 10:06:27 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:22042 Wed 11 Apr 2018 09:42:19 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34899 Wed 07 Feb 2024 17:18:40 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33986 -1 and 295.8 min^-1 kPa^-1. The same methodology for reaction mechanism determination was carried out for the calcination reaction and G(x)=1-(1-x)^1/3 was found to have the best linear fit. The activation energy and pre-exponential factor determined for the calcination reaction were 103.6 kJ mol^-1 and 6.9 × 10⁶ min^-1, respectively.]]> Wed 04 Sep 2019 12:16:35 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:28693 Tue 16 Oct 2018 12:06:45 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:43768 2 geological storage involves injection of supercritical CO₂ into a suitable reservoir with a structural trap from an overlying seal. Unconventional and conventional reservoirs provide opportunities for beneficial use such as enhanced recovery, supercritical CO₂ fracturing, and storage of gases such as CO₂ and ancillary gases, or potentially hydrogen. The purpose of this study is to use Australian examples of unconventional rock packages to understand the controls on CO₂ reactivity and mineral trapping (the most secure form of storage) and to demonstrate if there is potential for storage in unconventional reservoirs. Characterization of core from the Surat, Eromanga, and Cooper basins, is used to populate geochemical models and compare the potential for mineral trapping of CO₂. Interburden from a coal seam gas reservoir ranged from clay rich mudstones to interlaminated and calcite cemented sandstones. The interburden samples contained high plagioclase and chlorite mineral content and these were predicted in geochemical dissolved CO₂-production water-rock reactivity models to alter to calcite, ankerite, siderite and dawsonite mineral trapping 4 - 12 kg CO₂ per m3. CO₂ mineral trapping as siderite and ankerite in quartz rich oil sandstone was predicted to be lower than in interburden. Gas shale samples and black oil shales also contained a high mica, chlorite and feldspar content that can be converted to carbonate minerals, mineral trapping CO₂. Unconventional rock packages have strong potential for mineral trapping during CO₂ storage. In future a combination of characterization, CO₂ experiments and models should be performed for reservoirs and seals from sites of interest to understand initial changes to poro-perm. Several sandstones characterized here showed indicators of natural CO₂ or acidic fluid alteration with carbonates and clays filling natural fractures. Characterizing regions, where gases have been stored naturally and carbonates precipitated are valuable to validate long term predictions. Understanding the CO₂ storage potential of different reservoirs will also have applicability to future hydrogen storage.]]> Tue 14 Nov 2023 14:51:44 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:36731 Tue 13 Feb 2024 15:38:13 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:8269 Sat 24 Mar 2018 08:33:28 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:17446 Sat 24 Mar 2018 08:04:02 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:17841 2) emissions from the power generation sector to achieve 2020 emission reduction targets. Our study reveals that there are still important gaps, especially if the aim is to achieve energy security in a future-oriented way and generating sustainable, reliable and competitively-priced electricity. The paper outlines options by which Singapore can employ energy sources to reduce CO₂ emissions from the power generation sector beyond 2020.]]> Sat 24 Mar 2018 08:03:28 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:17427 Sat 24 Mar 2018 08:01:40 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19664 Sat 24 Mar 2018 08:01:10 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:21467 Sat 24 Mar 2018 07:52:31 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19157 Sat 24 Mar 2018 07:52:20 AEDT ]]> https://nova.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://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:27126 carb=7600M^-1s^-1 at 35°C and Eₐ=38 kJ mol^-1) and similar carbamate stability but with a ~40% larger enthalpy of protonation. It was also found to be less corrosive and have lower viscosity and heat capacity. Significant performance gains relative to MEA 30wt% were predicted by using BZA in a formulation with either MEA or 2-amino-2-methyl-1-proponal (AMP) with predicted reductions in reboiler duty up to 13%, improvements in mass transfer up to 20% and low corrosion potential.]]> Sat 24 Mar 2018 07:41:34 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:25947 Sat 24 Mar 2018 07:41:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:31004 Arundo donax, with zinc chloride. The textural parameters of the AMB can easily be controlled by varying the activation temperature. It is demonstrated that the mesoporosity of AMB can be finely tuned with a simple adjustment of the amount of activating agent. AMB with almost 100% mesoporosity can be achieved using the activating agent and the biomass ratio of 5 and carbonization at 500 °C. Under the optimized conditions, AMB with a BET surface area of 3298 m² g^–1 and a pore volume of 1.9 cm³ g^–1 can be prepared. While being used as an adsorbent for CO₂ capture, AMB registers an impressively high pressure CO₂ adsorption capacity of 30.2 mmol g^–1 at 30 bar which is much higher than that of activated carbon (AC), multiwalled carbon nanotubes (MWCNTs), highly ordered mesoporous carbons, and mesoporous carbon nitrides. AMB also shows high stability with excellent regeneration properties under vacuum and temperatures of up to 250 °C. These impressive textural parameters and high CO₂ adsorption capacity of AMB clearly reveal its potential as a promising adsorbent for high-pressure CO₂ capture and storage application. Also, the simple one-step synthesis strategy outlined in this work would provide a pathway to generate a series of novel mesoporous activated biocarbons from different biomasses.]]> Sat 24 Mar 2018 07:34:50 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26078 ex situ tar removal unit, where tar cracking is expected to occur via catalytic reactions with CaO. The current work evaluates the feasibility of the proposed CL-BIGCC concept via thermodynamic analysis using Aspen Plus. Moreover, the tar cracking ability of CaO is demonstrated using thermogravimetric analyzer coupled to Fourier transform infrared spectrometer (TGA-FTIR) experiments. As part of the thermodynamic analysis, sensitivity analyses of the key process parameters, such as the calcium/biomass (Ca/B) ratio, steam/biomass (S/B) ratio, carbonator temperature, and calciner temperature, and their effects on net thermal-to-electricity efficiency have been studied in detail. The optimal values of key process parameters, such as a compression ratio of 5.1, an air/fuel mass ratio of 15, a Ca/B ratio of 0.53, a S/B ratio of 0.17, and carbonator and calciner temperatures of 650 and 800 °C, respectively, have been obtained. Furthermore, the CL-BIGCC process simulated in the current work was found to have a net thermal-to-electricity efficiency of ~25% based on the above optimal parameters, which is the highest among other conventional steam-based BIGCC processes. The biomass gasification (i.e., partial oxidation) experiments in a TGA-FTIR with a CaO/biomass ratio of 1:1 at different temperatures showed that CaO effectively catalyzed tar-cracking reactions.]]> Sat 24 Mar 2018 07:31:31 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:27741 Sat 24 Mar 2018 07:27:46 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:22725 Hill 4 > PSO due to the ability of the Hill models to accommodate sigmoidal kinetics. Removal of fluoride from SPLL under atmospheric CO2 conditions was found to be inhibited with no removal occurring for the first 3000 min with the inhibition times, based on the reaction half-life, reducing with increased CO₂ partial pressure and stirring rate. X-ray diffraction (XRD) analysis revealed that the residual solid filtrate consisted of trona (Na₃(CO₃)(HCO₃)·2H₂O) a potentially valuable mineral kogarkoite (Na₃SO₄F) and fluorite (CaF₂) accounting for fluoride removal, and unreacted calcite (CaCO₃).]]> Sat 24 Mar 2018 07:15:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30701 Mon 23 Sep 2019 11:34:41 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:27362 Mon 12 Aug 2019 13:56:34 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26502 Mon 06 Mar 2017 12:45:52 AEDT ]]>