Production of second-generation biofuels by upgrading of pyrolysis bio-oil from biomass attracted much attention in recent years. Here, we present a study dedicated to the stabilization of pyrolysis bio-oil over NiMo/Al₂O₃ catalyst in single-stage fixed bed reactor with different temperature profiles (ramp to the 340 °C). Detailed characterisation of the textural properties of the fresh and the spent catalyst and the determination of the changes in physicochemical properties and chemical composition of the liquid and gaseous products have allowed us to discuss the influence of the temperature profile on the catalyst stability during 80 h time on stream of the bio-oil hydrotreatment. We have observed that the lower average temperature in the reactor can yield stabilized bio-oil with physicochemical properties comparable with bio-oil that was hydrogenated at higher temperatures. Moreover, the catalyst long-term stability was higher when using a slower temperature ramp. Thus, the physicochemical properties of the stabilized bio-oil obtained with the lower average temperature in the reactor was maintained uniform with the increasing time on stream, while deterioration of the properties of the hydrotreated liquid products produced under the faster temperature ramp occurred. Additionally, we have shown that no sulfur loss occurred from the NiMo/Al₂O₃ catalyst during bio-oil hydrotreatment.

近年来，生物质热解生物油提质生产第二代生物燃料备受关注。在这里，我们提出了一项研究，致力于在 NiMo/Al ₂ O _{3 上}稳定热解生物油催化剂在具有不同温度分布的单级固定床反应器中（升温至 340 °C）。对新鲜和废催化剂的结构特性的详细表征以及对液体和气体产物的理化性质和化学成分变化的测定，使我们能够讨论温度分布对催化剂稳定性的影响在 80 小时内在生物油加氢处理过程中。我们已经观察到反应器中较低的平均温度可以产生稳定的生物油，其物理化学性质与在较高温度下氢化的生物油相当。此外，当使用较慢的温度斜坡时，催化剂的长期稳定性更高。因此，随着运行时间的增加，在反应器中以较低平均温度获得的稳定生物油的物理化学性质保持一致，而在较快的温度斜坡下产生的加氢处理液体产品的性质发生恶化。此外，我们已经证明 NiMo/Al 没有发生硫损失生物油加氢处理过程中的₂ O ₃催化剂。