https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:31428 3. These results suggest that structure from motion is a viable tool for ongoing monitoring of ecologically-significant coral reefs, especially to establish effects of disturbances, provided the measurement error is considered.]]> Wed 11 Apr 2018 10:45:16 AEST ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:34544 Arundo donax and solid KOH at 600 °C for 2 h. The texture and the specific surface area of the activated microporous carbons can be controlled by adjustment of the ratio of Arundo donax and solid KOH. The prepared microporous carbons display larger surface areas and micropore volumes than those of the activated microporous carbon prepared by a two-step reaction. The porous carbon prepared with the KOH/biomass weight ratio of 2 (KLB2) exhibits the largest surface area of 1122 m² g⁻¹ and the highest micropore volume of 0.50 cm³ g⁻¹. Among the materials studied, KLB2 exhibits the highest CO₂ adsorption capacity at 273 K of up to 6.3 mmol g⁻¹ at 1 bar while the adsorption capacity at 273 K is increased to 15.4 mmol g⁻¹ at 30 bar. Present work demonstrates that highly stable activated microporous carbons can be prepared in a single step for effective CO₂ capture for both post- and pre-combustion. As the highly stable microporous carbons are prepared from waste biomass, it can provide an efficient way for developing cost effective adsorbents for CO₂ capture at low and high pressure.]]> Tue 26 Mar 2019 13:55:02 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:33388 Tue 03 Sep 2019 17:54:11 AEST ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:23209 Sat 24 Mar 2018 07:10:31 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:48220 Sat 11 Mar 2023 12:36:58 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:52932 Mon 29 Jan 2024 18:24:09 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:44056 2CO₃: 43.5%, Na₂CO₃: 31.5%, K₂CO₃: 25% mol), subjected to two different higher heating temperatures (350 °C and 600 °C). It is shown here that the addition of a carbonate eutectic affects char-making reactions through: tar generation modification, changes in the emitted volatile molecules, alteration of surface oxygenate bonds as well as transformation in the morphology of the remnant char. Initial results using Differential Thermal Gravimetric Analysis (DTG) show that, in carbonate treated samples, char yield is increased at both temperatures investigated. In treated cellulose, a reduced temperature onset of mass loss is observed, expected to be from modified depolymerisation and inhibition of levoglucosan formation for samples heated to both 350 °C and 600 °C. Gas analysis by micro-GC proves that carbonate is involved in the cracking of condensable volatiles, which generates a highly porous char structure and increases the emission of non-condensable volatiles. In addition, SEM results for carbonate treated cellulose demonstrate extensive pore generation including both surface and internally generated pores and interconnected tunnel-like structures at higher temperature (600 °C). This was not reflected however in BET results due to the melted salt blocking the available internal porous structure. Improvement in BET results for chars produced at 600 °C was regardless seen on carbonate addition in both biomass (improving from 371 m² g⁻¹ to 516 m² g⁻¹) and lignin (improving from 11 m² g⁻¹ to 209 m² g⁻¹).]]> Mon 29 Jan 2024 17:46:29 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:54733 Mon 11 Mar 2024 14:18:39 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/ /manager/Repository/uon:34734 0.5Sr_0.5Co_0.8Fe_0.2O_3−δ (LSCF5582) membranes prepared at sintering temperatures of 1200–1300 °C, with the aim of gaining an insight into their performance in the surface reaction limited regime for oxygen separation applications. The findings of this work are then compared with our experimental data on Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δ (BSCF5582) membranes. It is demonstrated that the adsorption rate constants of both membranes are two orders of magnitude greater than their respective oxygen desorption rate constants as the oxygen adsorption occurs in less than 24 s whilst the oxygen desorption takes approximately one hour to reach equilibrium. The activation energy for oxygen adsorption of LSCF5582 reduced to a quarter of its value with increasing the sintering temperature from 1200 °C to 1300 °C. This is attributed to the oxygen exchange occurring more rapidly along the grain boundaries resulting in a lower activation energy. The LSCF5582 grain sintered at 1200 °C is the optimum selection for oxygen separation applications at an operating temperature of 850 °C and oxygen partial pressure of 0.21 bar.]]> Fri 31 May 2019 12:54:50 AEST ]]>