https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26180 Sat 24 Mar 2018 07:24:10 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23740 2. The key innovation was the use of concrete and demolition waste (CDW) as the source of CO₂ sorbent. A comprehensive series of thermogravimetric analysis (TGA) experiments was carried out over a range of temperatures between 650 and 900 °C and pressures up to 20 atm to benchmark the CO₂ capture efficiency of CDW against conventional lime-based sorbents [e.g., calcined limestone (CL) and hydrated Portland cement (HPC)]. Effects of controlling parameters, such as the Ca/C ratio, steam/carbon (S/C) ratio, steam partial pressure, and total pressure, on the gas yield, gas composition, and CO₂ capture efficiency were thoroughly examined. Experimental results confirmed that CO₂ capture efficiencies as high as 56.4% and high-grade hydrogen production can be achieved when CDW is used as a sorbent. These results combined with the high mechanical strength, durability, and low cost make CDW an attractive sorbent for chemical looping gasification of carbonaceous solid fuels, particularly biomass.]]> Sat 24 Mar 2018 07:16:55 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43415 3Al₂O₆. A barium-doped sorbent retained a carbonation conversion capacity of over 60% over 40 calcination and carbonation cycles, while a strontium-doped sorbent retained a conversion of over 40% after 20 cycles. These high temperature (above 800°C) materials have the potential to be coupled with highly efficient and economically competitive power cycles.]]> Fri 16 Sep 2022 14:45:25 AEST ]]>