کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
62046 | 47618 | 2009 | 5 صفحه PDF | دانلود رایگان |

The epoxidation of propylene with H2–O2 mixtures was studied over a gold catalyst supported on a Ge-modified TS-1 catalyst at 170 °C. Shifts of X-ray diffraction lines to lower angle showed that the Ge was incorporated into the structure of the TS-1. The presence of Ge more than doubled the conversion from 1.6% to 4% while increasing selectivity from 87% to 91%. Density functional theory calculations indicated that the origin of the enhanced activity was a ligand effect of Ge on Ti, which lowered the activation energy for the critical epoxidation step.
Gold supported on a Ge-modified TS-1 was active for propylene epoxidation, due to a ligand effect of Ge on Ti, which lowered the activation energy for the critical epoxidation step.Figure optionsDownload high-quality image (51 K)Download as PowerPoint slide
Journal: Journal of Catalysis - Volume 267, Issue 2, 25 October 2009, Pages 202–206