Abstract Fast pyrolysis of biomass followed by hydrotreating of bio-oil is considered to be a promising thermochemical conversion process of biomass to liquid fuel. Catalytic hydrotreating converts the crude bio-oil from biomass pyrolysis into liquid intermediates with reduced oxygen content, and low viscosity and acidity. However, effective lifetime of catalyst can be significantly reduced by coking which has been recognized as the main cause of catalyst deactivation during the hydrotreating process. In this study, similar phenomenon has been observed but the catalyst deposit was different from the reported coke and thus a new term of carbonaceous deposit is introduced. Kinetics of the carbonaceous deposit formation and its characteristics have been investigated for hydrotreating of bio-oil derived from fast pyrolysis of rice husk using commercial HTB-45 Ni-based catalyst. A mathematical model for the hydrotreating process, which is based on key chemical reactions and consists of ordinary differential equations (ODEs), has been developed and solved with the kinetic parameters being obtained from the experiments. Results of this study are helpful for better understanding and optimization of the catalytic upgrading of fast pyrolysis bio-oil.

中文翻译：

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快速热解生物油加氢处理中积碳形成及催化剂失活动力学研究

摘要 生物质的快速热解和生物油的加氢处理被认为是一种很有前景的生物质热化学转化为液体燃料的过程。催化加氢处理将来自生物质热解的粗生物油转化为含氧量降低、粘度和酸度低的液体中间体。然而，结焦会显着降低催化剂的有效寿命，结焦已被认为是加氢处理过程中催化剂失活的主要原因。在这项研究中，已经观察到类似的现象，但催化剂沉积物与报道的焦炭不同，因此引入了一个新术语碳质沉积物。已经研究了碳质沉积物形成的动力学及其特征，用于使用商业 HTB-45 镍基催化剂对稻壳快速热解衍生的生物油进行加氢处理。加氢处理过程的数学模型基于关键化学反应，由常微分方程 (ODE) 组成，已开发并求解，并使用从实验中获得的动力学参数进行求解。本研究结果有助于更好地理解和优化快速热解生物油的催化升级。