Abstract
CF4, one of the Perfluorocompounds (PFCs), also known as a greenhouse gas with high global warming potential. In this study, Zr/γ-Al2O3 catalysts were developed for CF4 decomposition. The addition of Zr onto γ-Al2O3 achieves a high CF4 conversion efficiency of 85% at 650 °C and maintain its activity for more than 60 h, which is obviously higher than that of bare γ-Al2O3 (50%). The mechanism involved in CF4 decomposition over the Zr/γ-Al2O3 are clarified that the surface Lewis acidity sites are the main active center for CF4 directly adsorbing and decomposing. The results of NH3-TPD and FT-IR analyses suggest that the amount of Lewis acidity sites on catalyst surface increases significantly after the introduction of Zr, thereby enhancing the activity of catalyst for CF4 decomposition. The results of XPS analyses confirms the electrons transfer from Zr to Al, which contribute to the increase in Lewis acidity sites. The results of this work will help the development of more effective catalysts for CF4 decomposition.
Highlights
Perfluorocompounds (PFCs), such as CF4, have a high global warming potential (GWP), which is about 6500 times higher than that of CO2 over a 100-year time scale
The aim of this work is to investigate the precise role of Zr/Al2O3 in CF4 decomposition
This study provided in-sights in catalytically decomposing CF4 over Zr/Al2O3
Summary
Perfluorocompounds (PFCs), such as CF4, have a high global warming potential (GWP), which is about 6500 times higher than that of CO2 over a 100-year time scale. The lifetime of PFCs can reach up to 50,000 years [1]. CF4 is an extremely stable molecule because of its symmetry structure. The bond energy of C-F in CF4 molecule is 543 kJ mol−1, as known as the strongest bond in organic chemistry [2,3]. The non-ferrous smelting and semiconductor industry are generally regarded as the main sources of PFCs emissions [4]. It is of great importance to remove PFCs presented in the exhaust flue gas from non-ferrous smelting and semiconductor industry
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
