封装Pt的方钠石的转晶合成及其加氢活性耐硫性能的研究（英文）

Crystal transformation synthesis,hydrogenation activity and sulfur-tolerant performance of Pt particles encapsulated in sodalite

通过晶体转化的方法合成封装Pt的方钠石Pt/SOD。封装Pt的方钠石通过以下两步结晶的方法合成,在100℃结晶12h,120℃结晶144h,130℃结晶96h,140℃结晶60h,150℃结晶42h160℃结晶30h。样品在硫化氢的毒化前后表现了良好的加氢活性。通过X射线衍射法检测样品相的结晶形式。通过H2-TPD表征给体相Pt/SOD与受体相HZS-5之间的氢溢流。

Noble metals are widely used as hydrogenation catalysts for refining and modifying fuel oil. However,their stability is still a problem. Thus,crystal transformation method was used here to encapsulate platinum（ Pt） particles in sodalite through two steps. First,the sample was crystallized at 100 ℃ for 12 h. Then,it was further crystallized at 120 ℃ for 144 h,130 ℃ for 96 h,140 ℃ for 60 h,150 ℃ for 42 h,or 160 ℃ for 30 h. The resultant solid（ designated as Pt / SOD） shows high activity and excellen sulfur-tolerant performance in benzene hydrogenation. The crystalline phases were identified by X-ray diffraction technique. The hydrogen spillover effect of Pt / SOD and the spillover hydrogen acceptability of HZSM-5 were investigated with H_2-TPD.