https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46743 Wed 07 Feb 2024 14:57:34 AEDT ]]> https://ogma.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://ogma.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://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29543 Sat 24 Mar 2018 07:33:09 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25551 -1. The study concluded that the residual TPHs in soils had little impact on a range of environmental receptors. Assessment of the residual TPH ecotoxicity was complicated by the elevated salinity of stockpile soils which impacted on the earthworm and phytotoxicity assessments. Therefore results of this study suggest that it is paramount to focus beyond target contaminants while implementing risk-based management approach. Indicators for risk based assessment are considered critical for regulatory decision making. The results of this study provide a valuable input in to the risk based management of contaminated sites.]]> Sat 24 Mar 2018 07:26:04 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44721 Fri 21 Oct 2022 11:17:27 AEDT ]]>