https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38189 2 are the most potent of the greenhouse gases (GHGs), and one of the most promising methods of methane abatement is for methane to be captured through thermal decomposition processes. However, this approach introduces a major safety concern related to methane explosions and flame propagation in coal mines. It is vital that all of the safety issues related to this approach are addressed prior to the implementation of GHG emission control. This study investigates the effectiveness of venting in the event of methane explosions. In addition, the study examines the scaling effects by integrating the experimental results from this study with the data from previous explosion experiments carried out in a smaller scale experimental apparatus. The experimental setup consisted of a 1 m³ explosion chamber connected to a 9.7 m long venting duct. The results indicated that the methane explosion pressure significantly decreased in the venting duct, which, in turn, reduced the deflagration index (class of explosion). The venting approach can reduce the explosion pressure by approximately 83%. The data for the flame propagation inside the venting duct demonstrated the presence of flame acceleration and deceleration patterns at approximately one-third (3.2 m), and at the end of the venting duct, these flame accelerations (second explosion) have not been observed when using a 20 L explosion chamber with a similar venting ratio under identical ignition energies and methane concentrations. The flame front velocity reaching the end of the venting duct was measured at approximately 52 m s^–1.]]> Tue 10 Aug 2021 15:46:46 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:5681 Sat 24 Mar 2018 07:47:32 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:395 Sat 24 Mar 2018 07:42:32 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:28714 Sat 24 Mar 2018 07:35:42 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46626 2 atmosphere when compared with a N₂ atmosphere, where mass transport limitations in the anode compartment and the additional two-electron oxidation pathway from CO contribute. This hypothesis is verified by comparing the slurry arrangement to a solid working anode where mass transport is not required. In order to maximize the carbon utilization efficiency, operating below the thermodynamic temperature limit for reverse Boudouard gasification (700 °C) is recommended with agitation in slurry-based systems. For a maximum power output, operating under CO₂ at higher temperatures (>800 °C) and passing the CO containing flue gas over an oxygen reduction cathode achieve optimal results.]]> Mon 28 Nov 2022 13:29:36 AEDT ]]>