E. Lucas, K. Klabunde
1999
Citations
0
Influential Citations
25
Citations
Journal
Nanostructured Materials
Abstract
Abstract Hexafluoropropylene (HFP), is destructively adsorbed with specially prepared nanoscale magnesium oxide powders producing MgF 2 , CO, CO 2 and graphite. The reaction occurs best at 450 °C with a 2:1 surface oxide-to-HFP ratio. The reaction is monitored using pulsed U-tube reactors which shows the elution of large amounts of CO and CO 2 which steadily decreases as the surface oxides are depleted. The elution of small amounts of C 2 F 4 is also seen close to the breakthrough point of the reaction. The solid product is partially enclosed in graphite and has a 2:1 ratio of MgO to MgF 2 confirmed by elemental analysis. Powder XRD shows only the presence of MgF 2 in the solid, indicating the MgO has lost all crystallinity during the reaction. FT-IR of the solid during and after reaction indicates the presence of CF 2 and hexafluoropropylene epoxide as intermediates.