Investigation of a new approach to decompose two potent greenhouse gases: photoreduction of SF(6) and SF(5)CF(3) in the presence of acetone.
In this paper, we addressed the utilization of photochemical method as an innovative technology for the destruction and removal of two potent greenhouse gases, SF(6) and SF(5)CF(3). The destruction and removal efficiency (DRE) of the process was determined as a function of excitation wavelength, irradiation time, initial ratio of acetone to SF(5)X (X represented F or CF(3)), initial SF(5)X concentration, additive oxygen and water vapor concentration. A complete removal was achieved by a radiation period of 55min and 120min for SF(6)-CH(3)COCH(3) system and SF(5)CF(3)-CH(3)COCH(3) system respectively under 184.9nm irradiation. Extra addition of water vapor can enhance DRE by approximately 6% points in both systems. Further studies with GC/MS and FT-IR proved that no hazardous products such as S(2)F(10), SO(2)F(2), SOF(2), SOF(4) were generated in this process.
Huang
Li
L
Institute of Environmental Science, Fudan University, Shanghai 200433, People's Republic of China.
Dong
Wenbo
W
Zhang
Renxi
R
Hou
Huiqi
H
D000096:Acetone / Q000737:chemistry* / Q000528:radiation effects; D000393:Air Pollutants / Q000737:chemistry / Q000528:radiation effects; D000397:Air Pollution / Q000517:prevention & control; D006845:Hydrocarbons, Fluorinated / Q000737:chemistry* / Q000528:radiation effects*; D010782:Photolysis; D013457:Sulfur Compounds / Q000737:chemistry* / Q000528:radiation effects*; D013459:Sulfur Hexafluoride / Q000737:chemistry* / Q000528:radiation effects*; D014466:Ultraviolet Rays; D018505:Waste Management / Q000379:methods
D000393:Air Pollutants; D006845:Hydrocarbons, Fluorinated; C516032:SF5CF3; D013457:Sulfur Compounds; D000096:Acetone; D013459:Sulfur Hexafluoride