Toluene, as one of the representative biomass tar model compound, has been widely chosen for investigation of biomass tar reforming. Herein, novel Ni/(Mg, Al)O_x (Ni/MAO) catalysts derived from Ni-Mg-Al hydrotalcites were prepared successfully and used for steam reforming of toluene (SRT). Among all the catalysts, Ni/MAO catalyst prepared at pH of 10 and aging temperature of 20 °C (Ni/MAO-10) exhibited superior activity in toluene conversion (95.3%) and syngas production (833 mmol/g-Ni), as well as the excellent resistance to carbon deposition. Through characterizations, the highest basicity, highest reducibility, tailored “rosette-like” morphology, and larger specific surface area in Ni/MAO-10 were confirmed. Furthermore, the structure-activity relationship, reforming mechanism, deactivation, and regeneration of the catalyst were comprehensively elaborated from rigorous experiments, and meanwhile, the activation energies and turnover frequency (TOF) values of four Ni/MAO catalysts in SRT were calculated to theoretically explain their activities.

甲苯作为具有代表性的生物质焦油模型化合物之一，已被广泛选择用于生物质焦油重整的研究。在此，新型 Ni/(Mg, Al)O _x成功制备了衍生自 Ni-Mg-Al 水滑石的 (Ni/MAO) 催化剂并将其用于甲苯蒸汽重整 (SRT)。在所有催化剂中，在 pH 为 10 和老化温度为 20 °C 下制备的 Ni/MAO 催化剂（Ni/MAO-10）在甲苯转化率（95.3%）和合成气生产（833 mmol/g-Ni）方面表现出优异的活性，以及优异的抗积碳能力。通过表征，确认了 Ni/MAO-10 中最高的碱度、最高的还原性、定制的“玫瑰花状”形态和更大的比表面积。此外，通过严格的实验，对催化剂的构效关系、重整机理、失活和再生进行了全面阐述，同时，