In order to facilitate the further processing and utilization of biomass pyrolysis oil, the chemical composition and thermal properties of biomass pyrolysis oil from pyrolysis of rice husk were investigated. The chemical composition analysis revealed that the pyrolysis oil contained a large amount of oxygenated compounds, i.e., acid, ketones, and phenols. Thermal degradation behaviors and kinetics of pyrolysis oil were investigated at different heating rates (5, 20, 35, and 50 °C min^–1) under N₂ and air atmospheres by TG. Pyrolysis oil decomposition mainly experienced three stages in either N₂ or air atmosphere, and the corresponding activation energies vary with the degree of conversion. Py-GC/MS analysis of the pyrolysis oil reveals that ketones and aromatics are the main pyrolysis products of biomass pyrolysis oil. When the temperature increased from 600 to 700 °C during Py-GC/MS analysis, the content of ketones increased while the content of aromatics decreased. Subsequently, the feasibility of catalytic steam reforming of pyrolysis oil to produce renewable hydrogen was performed in a fixed-bed reactor with a NiO/ceramic foam catalyst. The effects of calcination temperature and metal content on the hydrogen yield were investigated. It is indicated that higher calcination temperature and loading content lead to the aggregation and sintering of NiO particles. A maximum hydrogen yield of 105.28 g H₂ kg^–1 pyrolysis oil (up to 81.1% of the stoichiometric yield) was obtained at a reaction temperature of 700 °C, S/C ratio of 1, and NiO loading content of 3.54%.

中文翻译：

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生物质热解油的热特性和催化蒸汽重整制氢的潜力

为了促进生物质热解油的进一​​步加工利用，研究了稻壳热解后的生物质热解油的化学组成和热学性质。化学成分分析表明，热解油含有大量的含氧化合物，即酸，酮和酚。用TG研究了在N ₂和空气气氛下在不同升温速率（5，20，35和50°C min ^-1）下热解油的热降解行为和动力学。热解油在N _2中的分解主要经历三个阶段或空气气氛，相应的活化能随转化程度而变化。热解油的Py-GC / MS分析表明，酮和芳烃是生物质热解油的主要热解产物。在Py-GC / MS分析中，当温度从600升至700°C时，酮含量增加而芳烃含量降低。随后，在具有NiO /陶瓷泡沫催化剂的固定床反应器中进行了热解油催化蒸汽重整以生产可再生氢的可行性。研究了煅烧温度和金属含量对氢气产率的影响。结果表明，较高的煅烧温度和较高的负载量会导致NiO颗粒的聚集和烧结。最大氢气产量105.28 g H ₂在700°C的反应温度，1的S / C比和3.54％的NiO含量下获得kg ^–1的热解油（化学计量产率的81.1％）。