Chlorotrifluoroethylene (CTFE) is a vital fluorinated olefinic monomer produced through the catalytic hydrodechlorination of trichlorotrifluoroethane (CFC-113)

an eco-friendly process. However

hydrodechlorination catalysts for olefin production often suffer from poor stability. The Pd/AC catalyst and Pd-Cu/AC catalyst prepared by co-impregnation method exhibited poor stability

Pd-Cu/AC catalyst with CFC-113 conversion dropping to around 37% after 50 h of hydrodechlorination reaction. Brunauer-Emmett-Teller

transmission electron microscopy

X-ray photoelectron spectroscopy

and X-ray diffraction of fresh and deactivated Pd/AC catalysts indicate that the deactivation of Pd/AC catalysts is due to high-temperature agglomeration of Pd. Comparative analysis of fresh and deactivated Pd-Cu/AC catalysts using Brunauer-Emmett-Teller

transmission electron microscopy

and thermogravimetric analysis techniques revealed decreased dispersion of active sites

reduced surface area

catalyst aggregation deactivation

and a significant decrease in Cu content. Furthermore

the results of NH

3

-TPD revealed that the acid sites of the catalyst increased significantly. X-ray diffraction spectra indicated the formation of new species

basic copper chloride (Cu

2

(OH)

3

Cl)

during the reaction. As the reaction progressed

these new species agglomerated

leading to a gradual loss of catalyst activity. Moreover

the d

eactivated catalyst was successfully reactivated using a simple alkaline washing method.