Molybdenum Oxide-Modified Iridium Catalysts for Selective Production of Renewable Oils for Jet and Diesel Fuels and Lubricants
作者:Sibao Liu、Weiqing Zheng、Jiayi Fu、Konstantinos Alexopoulos、Basudeb Saha、Dionisios G. Vlachos
DOI:10.1021/acscatal.9b02693
日期:2019.9.6
alkanes. Catalyst characterization suggests that Ir is reduced to a fully metallic state to dissociate hydrogen for hydrogenation. Intact MoOx, partly covering the Ir metal surface, promotes ring opening, hydrogenolysis of etheric and alcoholic C–O bonds, and hydrogenation of C═O bonds. This study highlights the potential of low-cost metal–metal oxide catalysts with low loading of oxophilic metals to enable
负载型金属-金属氧化物逆催化剂由于对生物质基质有效的加氢脱氧(HDO)活性而受到了广泛的研究兴趣,但是报道的催化剂的高成本对商业化提出了挑战。我们介绍了一系列金属-金属氧化物催化剂的合成,Ir-MO x / SiO 2(M = Re,Mo,W,V或Nb)和M'-MoO x / SiO 2(M = Rh,Ru ,Pt或Pd)及其在多呋喃(高碳)基材上的HDO性能,以生产可再生的喷气燃料和柴油燃料以及润滑油基础油。MoO x改性的Ir / SiO 2催化剂,Mo / Ir比为0.13(Ir–MoO x / SiO 2)在温和的反应条件下表现出最高的产品收率(78-96%)。使用探针底物的对照实验表明,饱和和不饱和呋喃环的呋喃环氢化和C–O氢解作用是按顺序发生的。与底物或中间化合物的呋喃或饱和呋喃环相邻的碳原子会经历缓慢的C–C键断裂,从而产生一小部分较轻的烷烃。催化剂表征表明,Ir被还原为完全金属态以解离氢进行氢化。完整的MoO