https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20822 Sat 24 Mar 2018 08:05:53 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19538 Sat 24 Mar 2018 08:02:05 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29785 0, Hg²⁺, or Hg particulate. During oxy-fuel combustion, impurity concentrations, such as SOᵪ, NOᵪ, and Hg, can be up to 4 times higher than concentrations in air combustion. An increased mercury concentration is of concern because mercury is known to attack aluminum heat exchangers required in the compression of CO₂. As a result of the elevated concentrations during oxy-fuel conditions, interactions of Hg and SOᵪ were investigated in this study to verify if there is any competition between SOᵪ and Hg. The effect of Hg, SOᵪ, H₂O, and temperature on the native capture of Hg by fly ash was assessed using a quartz flow reactor packed with fly ash to simulate a bag filter. Doubling Hg in the system from 5 to 10 μg/Nm³ doubled the amount of Hg captured in the fly ash from 1.6 to 2.8% and increased the amount of Hg unaccounted from 5.8 to 18.1%. Increased SO² decreased the proportion of Hg⁰ in the flue gas. The temperature in the bag filter was found to have a large impact on the mercury capture by fly ash. As the temperature was increased from 90 to 200 °C, Hg⁰ in the flue gas was found to increase from 77.9 to 98.3%, indicating better capture of Hg at lower temperatures.]]> Sat 24 Mar 2018 07:23:39 AEDT ]]>