https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:37723 2 and polyaromatics during lignite pyrolysis under pressurized entrained-flow conditions. The pyrolysis temperature and pressure ranged between 600-900 ℃ and 0.1-4.0 MPa, respectively, and were found to greatly influence the yield and composition of pyrolysis products. The results showed that the concentration of H₂ in the light gas fraction increased drastically with pyrolysis temperature and pressure, reaching 91.69 vol% at 900 ℃ and 4.0 MPa, which corresponded to H₂ generation of 0.27 m³/kg coal. The yield of polycyclic aromatic hydrocarbons (PAHs) such as naphthalene, biphenylene, fluorene, phenanthrene, pyrene, and fluoranthene was also promoted at elevated pyrolysis temperatures and pressures. The highest PAHs concentration of 90.4 area% in the pyrolysis oil was obtained at 900 ℃ and 4.0 MPa. It was also found that the changes in the hydrogen distribution under pressurized entrained-flow conditions mainly took place during the secondary pyrolysis reactions. It was postulated that hydrogen was formed via aromatization, condensation, aromatic ring growth mechanism, and direct cleavage reactions. The findings of this study showed that lignite could be efficiently converted to H2-rich gas, PAHs as chemical raw materials, and energy-dense lignite char via a novel poly-generation system based on pressurized entrained-flow pyrolysis.]]> Thu 25 Mar 2021 12:33:52 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48503 2, CO, NO, and SO₂) were also investigated during the combustion process (O₂, 21%; N₂, 79%) to compare coal and biomass blends with coal and pretreated biomass blends. These results, including the emission peak and integral value, generally decreased as the biomass blending ratio increased except for the NO emission. The SO₂ emission decreased only with an increase in the ashless biomass owing to the lower sulfur content in ashless biomass. Overall, this study indicated that blending pretreated biomass, especially ashless biomass, is more effective toward better cocombustion and environmental behavior as the biomass blending ratio increases.]]> Mon 29 Jan 2024 17:44:28 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48502 Mon 20 Mar 2023 15:28:38 AEDT ]]>