由非晶态Ni-P低温制备Ni_2P催化剂及其对二苯并噻吩加氢脱硫的催化性能  

Preparation of Ni_2P Catalyst from Amorphous Ni-P at Low Temperature and Its Catalytic Performance for Dibenzothiophene Hydrodesulfurization

作　　者：宋立民[1] 李伟[1] 张明慧[1] 陶克毅[1] 

机构地区：[1]南开大学化学学院材料化学系新催化材料科学研究所,天津300071

出　　处：《催化学报》2006年第12期1127-1132,共6页

基　　金：国家自然科学基金(20403009);教育部科学技术研究重点项目(105045)资助.

摘　　要：以非晶态Ni-P合金为前驱体，在低温下通过PH3处理制备了Ni2P／SiO2-Al2O3催化剂，并用X射线衍射（XRD）、透射电镜（TEM）、电感耦合等离子体发射光谱、N2吸附和X射线光电子能谱（XPS）进行了表征，以二苯并噻吩为探针，在小型连续流动固定床反应器上考察了催化剂的加氢脱硫性能．XRD结果表明，在200～300℃范围内前驱体都可以完全转化为Ni2P，随着磷化温度的升高，晶体结构变得越来越完整．TEM观察发现，Ni—P粒子和Ni2P粒子的平均尺寸都在40～50nm，并且都能够高分散在SiO2-Al2O3载体上．XPS结果表明，不论是非负载还是SiO2-Al2O3负载的Ni2P，表层主要为Ni2P和钝化层Ni3（PO4）2．Ni2P／SiO2-Al2O3催化剂在实验范围内表现出很好的二苯并噻吩加氢脱硫性能．Ni2P/SiO2-Al2O3 catalysts were successfully prepared by treating amorphous Ni-P alloys with phosphine at low temperature. The as-prepared catalysts were characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM）, inductively coupled plasma atomic emission spectroscopy, N2 adsorption, and X-ray photoelectron spectroscopy （XPS）. The XRD data showed that the amorphous Ni-P/SiO2-Al2O3 precursors could be completely transformed to crystalline Ni2P/SiO2-Al2O3 at 200-300 ℃. The crystalline structure of Ni2P became more prominent with increasing phosphatization temperature. The results of TEM indicated that Ni-P and Ni2P particles were both 40-50 nm in diameter and were well dispersed on the supports. The XPS results suggested that the main components were Ni2P and Ni3 （PO4）2 on the surface of both Ni2P and Ni2P/SiO2- Al2O3. The Ni2P/SiO2-Al2O3 catalysts showed good activity for dibenzothiophene hydrodesulfurizationunder the experimental conditions.

关 键 词：非晶态合金 磷化镍 二苯并噻吩 加氢脱硫 

分 类 号：O643.32[理学—物理化学]