应用化学2024，Vol.41Issue(12)：1732-1741,10.DOI:10.19894/j.issn.1000-0518.240194
La-Pd/γ-Al2O3对蒽加氢饱和性能的影响
Influence of La-Pd/γ-Al2O3 on the Performance for Hydrogenation Saturation of Anthracene
摘要
Abstract
The presence of polycyclic aromatic hydrocarbons in coal tar and heavy oil can reduce the quality of oil products and pollute the environment. In order to reduce the content of harmful substances in fossil resources,minimize environmental pollution,and prepare efficient light fuels,anthracene is used as a model compound for catalytic hydrogenation saturation of polycyclic aromatic hydrocarbons. A series of Pd/γ-Al2O3 catalysts with different mass fractions of La were prepared by impregnation method,and the effects of La introduction on the structure and properties of the catalysts,as well as the reaction performance of anthracene hydrogenation to fully hydrogenated anthracene,were investigated by characterization methods such as X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),and ammonia gas temperature programmed desorption (NH3-TPD). The results showed that the addition of an appropriate amount of La significantly improved the selectivity of fully hydrogenated anthracene. When the loading mass fraction of La metal was 1％,the temperature was 275 ℃,and a hydrogen pressure was 4 MPa,the conversion rate of anthracene hydrogenation is the highest,at 99.9％. The XRD characterization results of the catalyst showed that appropriate doping of metal La into Pd based catalyst reduced the metal particle size of the catalyst and improved the dispersion of Pd. The XPS characterization results indicate that the introduction of 1％ La results in the highest content of Pd0 active metal and the best hydrogenation effect. The NH3-TPD results indicate that a higher degree of weak acidity is beneficial for the deep hydrogenation of anthracene. This provides theoretical guidance for designing efficient precious metal catalysts to catalyze the synthesis of fully hydrogenated anthracene from anthracene.关键词
蒽/加氢饱和/La-Pd双金属催化剂/全氢蒽Key words
Anthracene/Hydrogenation saturation/La-Pd bimetallic catalyst/Perfluoroanthrene分类
化学化工引用本文复制引用
张楠,雷海凤,白丽军,郭向阳,王明义,王俊文..La-Pd/γ-Al2O3对蒽加氢饱和性能的影响[J].应用化学,2024,41(12):1732-1741,10.基金项目
国家自然科学基金(No.22308244)资助Supported by the National Natural Science Foundation of China(No.22308244) （No.22308244）
