Ni2P/Fe-HAP催化剂的表征及其苯酚加氢表面作用机理

Characterization of Ni2P/Fe-HAP Catalyst and Its Surface Interaction Mechanism in Phenol Hydrogenation

摘要:

以市售低品级羟基磷灰石（HAP）为原料，通过离子交换法合成载体Fe-HAP，然后用浸渍法制备出负载型Ni2P/HAP和Ni2P/Fe-HAP催化剂。通过N2吸附-脱附、扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）和热重（TG）等手段对催化剂进行了表征。引入Fe3+极大地提高了载体的比表面积，Ni2P分散在Fe-HAP表面，热稳定性较好。以苯酚加氢制备环己酮为反应体系，在反应温度为150℃、压力为0.5MPa、时间为3.5h的条件下，对比了Ni2P/HAP和Ni2P/Fe-HAP催化剂的催化性能。结果发现，Ni2P/Fe-HAP催化剂显示出良好的催化活性和环己酮选择性。

Abstract:

The carrier Fe-HAP was synthesized by ion exchange method using commercially available low-grade HAP as raw material, and then supported Ni2P/HAP and Ni2P/Fe-HAP catalysts were prepared by impregnation method. The catalyst was characterized by N2 adsorption-desorption, scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and thermogravimetry (TG). Doping Fe3+ greatly increases the specific surface area of the carrier, Ni2P dispersed on the surface of Fe-HAP and good thermal stability. The reaction system was prepared by hydrogenation of phenol to cyclohexanone. The catalytic performance of Ni2P/HAP and Ni2P/Fe-HAP catalysts was compared using cyclohexanone prepared from phenol hydrogenation as the reaction system at a reaction temperature of 150 ° C, a pressure of 0.5 MPa, and a time of 3.5 h. It was found that the Ni2P/Fe-HAP catalyst showed good catalytic activity and cyclohexanone selectivity.