A novel method to decompose two potent greenhouse gases: Photoreduction of SF6 and SF5CF3 in the presence of propene

Photodegradation of SF6 on polyisoprene surface: Implication on elimination of toxic byproducts

“…The likely reason of fouling was photoinitiated polymerization upon collision of radicals. Similar phenomenon was reported in our lab's previous works [14]. The fouling on UV lamp will impede the transmittance of UV light and inhibit the DRE largely.…”

“…According to reports [3,13], oxidative radicals such as O ( 1 D) and hydroxyl do not react with SF 6 because of the strong electron affinity of the fluorine atom. On the other hand, reductive radicals generated from propene that decompose SF 6 have been reported in our previous studies [14], yet the fouling on the surface of UV lamp caused by rapid photoinitiated radical polymerization and formation of toxic SiF 4 were found to hinder possible application of this technology to industry. In this paper, reduction of SF 6 will be investigated in case of the reaction between SF 6 molecules and reductive radicals excited from natural rubber (NR)-a polymer constituted by repeating unit of 1,4-cis polyisoprene (PI).…”

Adsorption equilibrium of sulfur hexafluoride on multi-walled carbon nanotubes

“…Because the process/equipment and material modifications are not currently practical, add-on-control approaches are the most available and cost-effective methods at present. Several studies have addressed the abatement/destruction methods such as thermal destruction [3], catalytic decomposition [4], plasma abatement [5], electrochemical reduction [6], photodegradation [7,8] and other advanced or combined abatement processes [9]. However, all of these are very costly and by-products emitted from some methods are harmful to human health and the environment [10].…”

Fighting global warming: The potential of photocatalysis against CO2, CH4, N2O, CFCs, tropospheric O3, BC and other major contributors to climate change

“…The [157], propene [158] or styrene [159]. To decompose more than 90% of the initial SF 5 X, 360 min of irradiation were necessary in the presence of styrene or propene, but only 100 min in the presence of acetone.…”