https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38043 Mon 20 May 2024 12:05:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37933 10³ °C/min) and temperatures (550-800 °C). The tar composition was analyzed by gas chromatography with the simulated distillation method and a comprehensive two-dimensional gas chromatography/mass spectrometry. The structure of coke suspended in tar (Coke-S) and char was characterized by electron spin resonance, Raman and thermogravimetry. The reaction of volatiles during coal pyrolysis is more significant in the downer-bed reactor, due to the increased interaction between different volatile radical fragments or with char, leading to increased coke yield and lower tar quality. In addition, the volatile radical fragments are dominated by the core structure of aromatic carbon at higher than 650 °C in the downer-bed reactor. In the second thermal field in the downer-bed reactor, Coke-S produced by these fragments has more macromolecular structures and greater stability than char obtained at the same temperature.]]> Mon 05 Jul 2021 13:21:44 AEST ]]>