Hydrodeoxygenation of lignin-derived phenols to produce hydrocarbons over Ni/Al-SBA-15 prepared with different impregnants
Hydrodeoxygenation of lignin-derived phenols to produce hydrocarbons over Ni/Al-SBA-15 prepared with different impregnants
复制标题
不同浸渍剂制备的 Ni/Al-SBA-15 上木质素衍生酚加氢脱氧生成碳氢化合物
DOI：
10.1016/j.fuel.2019.01.126
复制
发表时间：
2019-05-01
期刊：
影响因子：
7.4
通讯作者：
Chen, Guanyi
中科院分区：
文献类型：
--
作者：
Li, Xiangping;Zhang, Jianguang;Chen, Guanyi
非贵金属介孔催化剂是木质素衍生酚水相加氢脱氧制烃的理想催化剂之一。采用等湿浸渍法制备了Ni/Al-SBA-15催化剂，并研究了其对丁香酚的加氢脱氧性能。研究了初湿浸渍剂对Ni/Al-SBA-15催化剂上丁香酚加氢脱氧性能的影响。采用XRD、N2吸附、TEM、FTIR、Py-FTIR、XRF和ICP-MS等手段对材料进行了表征。与传统的以水为溶剂的等体积浸渍法相比，以乙醇为溶剂的等体积浸渍法可显著提高Ni/Al-SBA-15的活性。对于Ni/Al-SBA-15，负载镍物种后总酸量减少，这主要是由于刘易斯酸中心减少所致。以乙醇为浸渍剂制备的Ni/Al-SBA-15中的刘易斯酸强度提高。Ni/Al-SBA-15-E催化剂上丁香酚水相加氢脱氧生成丙基环己烷和丙苯的产率均有所提高。Ni/Al-SBA-15-E的超强催化性能归因于其较强的刘易斯酸中心和完整的骨架结构之间的协同作用。
Non-noble metal(s)-based mesoporous catalysts are one of the promising catalysts for aqueous phase hydrodeoxygenation of lignin-derived phenols to produce hydrocarbons. In this paper, Ni/Al-SBA-15 was prepared through incipient wetness impregnation method and the performance of eugenol hydrodeoxygenation over Ni/Al-SBA-15 was studied. The effect of incipient wetness impregnant on the performance of eugenol hydrodeoxygenation over Ni/Al-SBA-15 was investigated. The materials were characterized by XRD, N-2-sorption, TEM, FTIR, Py-FTIR, XRF and ICP-MS. In comparison with the traditional incipient wetness impregnation using water as solvent, the activity of Ni/Al-SBA-15 was significantly improved by using ethanol as solvent during the process of incipient wetness impregnation. For Ni/Al-SBA-15, the quantity of total acid was decreased after loading nickel species which was mainly due to the decrease of Lewis acid sites. The strength of Lewis acid in Ni/Al-SBA-15 prepare with ethanol as impregant was enhanced. The yields of propyl cyclohexane and propylbenzene from aqueous phase hydrodeoxygeation of eugenol over Ni/Al-SBA-15-E were increased. The super catalytic behavior of Ni/Al-SBA-15-E was attributed to the synergistic effect between the stronger Lewis acid sites and the intact framework structure of Ni/Al-SBA-15-E.