Ti-Si Mixed Oxides by Non-hydrolytic Sol-Gel Synthesis as Potential Gold Catalyst Supports for Gas-phase Epoxidation of Propylene in H_2 and O_2

摘要

The amorphous Ti-Si mixed oxides prepared from chloride precursors using a one-step nonhydrolytic sol-gel route could serve as efficient gold catalyst supports for gas-phase epoxidation of propylene in O_2 and H_2.A propylene conversion of 6.8% at the initial 60min and 4.0% after 4 h of time-on-steam,keeping a selectivity to propylene oxide as high as 95%,was obtained over the gold supported on a Ti-Si mixed oxide containing 10 mol% of Ti.