Pd/Hβ-zeolite catalysts for catalytic combustion of toluene:Effect of SiO2/Al2O3 ratio

• 作 者: Zekai Zhang Longya Xu Zhanlong
• 机 构: College of Chemical Engineering and Materials Science,Zhejiang University of Technology,Hangzhou 310
• 出 处: 天然气化学（英文版）
• 发表日期: 2010年4期
• 关键词: pure silica β zeolite PdO hydrophobicity toluene

The effect of pure and high silica Hβ zeolites on the catalytic performance of toluene combustion over Pd/H/3 catalyst was evaluated.Pure and high silica β zeolites were prepared by direct synthesis procedures,then 0.1 wt% of palladium was impregnated on different Hβ zeolites via incipient wetness technique using palladium nitrate as the Pd source.The Pd/Hβ catalysts were characterized by XRD,N2 adsorption/desorption,H2O adsorption,NH3-TPD,H2-TPR and XPS techniques.With increasing the SIO2/Al2O3 ratio of β zeolite,the activity of the Pd/Hβ catalysts for toluene combustion increased clearly and the pure silica β zeolite supported Pd catalyst showed the best catalytic activity.The superior catalytic performance of Pd/β catalyst prepared from pure silica β zeolite was attributed to its high hydrophobicity and the preserving ability for PdO active species.