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

Abstract

Listen

Translate article

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°C for 12 h. Then, it was further crystallized at 120°C for 144 h, 130°C for 96 h, 140°C for 60 h, 150°C for 42 h, or 160°C for 30 h. The resultant solid (designated as Pt/SOD) shows high activity and excellent 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 H2-TPD.