铈柱撑膨润土负载Ni2P对噻吩加氢脱硫的影响

以钙钠基膨润土为原料,首先对其钠化改型得到适合制备柱撑膨润土的基质,然后使用交联法制备不同OH-含量的Ce柱撑液,进一步制备Ce-柱撑膨润土,以其为载体用浸渍法制备Ni2P/Ce-PILC加氢脱硫催化剂,并用XRD、氮气吸附和H2-TPR等方法对催化剂进行了表征,考察了不同OH-含量对Ce-柱撑膨润土的柱撑效果和催化剂活性的影响。结果表明,500℃下焙烧3 h后Ce-柱撑膨润土层间距稳定在1.4078 nm;在n(Ni):n(P)为2:1、焙烧温度为500℃(3 h)、还原温度为500℃(2 h)、反应温度为350℃的情况下,当n(OH-):n(Ce3+)为2.5:1时,制备的催化剂催化噻吩加氢脱硫的活性最高,噻吩转化率为47%。

Influence of Hyprodesulfurization of Thiophene over Ni2P Catalysts Supported on the Ce-activated Bentonite

Ce-pillared interlayer montmorillonite was prepared using the artificial Ca-Na-bentonite as starting material.Pillaring agent solutions were prepared by adding different molar NaOH.In this thesis,nickel phosphide was loaded on Ce-PILC by the impregnation method.The catalysts were characterized by X-ray diffraction(XRD),N2-adsorption specific surface area measurements(BET) and H2-temperature programmed reduction(H2-TPR).The effects of different n(OH-)/n(Ce3+) on PILC and catalyst activity for the HDS were investigated.The results showed that the basal interlayer spacing with high thermal stability was 1.4078 nm when calcined at 500 ℃ for 3 h;Ni2P loading of 10.0%,n(Ni)/n(P) for 2/1,calcined at 500 ℃ for 3 h,reducted at 500℃ for 2 h and the reaction temperature 350 ℃,when the n(OH-)/n(Ce3+) for 2.5/1,the hydrodesulfurization(HDS) of thiophene was optimal and the thiophene conversion was 47%.