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化工学报  2015 

纳/微复合结构TiO2负载催化剂的加氢脱硫性能

DOI: 10.11949/j.issn.0438-1157.20141083, PP. 114-120

Keywords: TiO2,复合结构,形貌,加氢脱硫

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Abstract:

以传统固相烧结法制备的不稳定的层状K2Ti2O5为前驱体,直接将钛酸钾晶须进行离子交换得到具有纳微复合结构的TiO2载体,等体积浸渍法制备出MoO3/TiO2催化剂,运用SEM、XRD、BET、TEM等技术手段对载体和催化剂进行表征,并考察了该TiO2复合结构负载催化剂的加氢脱硫催化活性。SEM和XRD分析显示:该纳微米复合结构是由纳米颗粒与微米晶须构成的特殊结构,拥有不同形貌和尺寸的TiO2却具有相同的锐钛矿相。与单独TiO2纳米粒子和TiO2晶须相比,TiO2复合结构负载催化剂表现出更佳的脱硫催化能力,在温度310℃、压力2.1MPa、体积空速6h-1、氢/油体积比600条件下,催化剂表现出优异的DBT脱硫性能。

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