Article ID Journal Published Year Pages File Type
1314657 Journal of Fluorine Chemistry 2013 4 Pages PDF
Abstract

The coke formed on the Rb–K/AC catalysts during the synthesis of C2F5I by the reaction between C2HF5 and I2 was investigated using N2 adsorption–desorption, thermogravimetry and differential thermal analysis (TG-DTA), and X-ray photoelectron spectroscopy (XPS). The results indicated that the deactivation was mainly caused by the deposition of coke which induced micropore blockage and active sites coverage. The coke species on the Rb–K/AC catalysts surface included carbonaceous carbon and fluorocarbons with low F/C radio, and had different structures to that of graphite. Moreover, the deactivated catalyst was easily reactivated by burning out the coke formed on the catalyst by the addition of O2 at 150–350 °C, and the reactivated catalyst exhibited catalytic activity almost as high as the fresh sample.

Graphical abstractThe deactivation was mainly caused by the deposition of coke, and the coke species included carbonaceous carbon and fluorocarbons with low F/C radio, and had different structures to that of graphite. The deactivated catalyst was easily reactivated by burning out the coke formed on the catalyst by the addition of O2 at 150–350 °C, and the reactivated catalyst exhibited catalytic activity almost as high as the fresh sample.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The catalyst deactivation is caused mainly by the deposition of coke. ► The coke species include carbonaceous carbon and fluorocarbons with low F/C radio. ► The coke can be burnt out by the addition of O2 at 150–350 °C. ► The reactivated catalysts exhibit catalytic activity as high as the fresh sample.

Related Topics
Physical Sciences and Engineering Chemistry Inorganic Chemistry
Authors
, , ,