While the C_(4)F_(7)N is an environmental-friendly insulation gas with a strong potential to replace SF_(6) in the insulation devices,its decomposed species,especially C_(2)F_(6),C_(3)F_(8),C_(3)F_(6),and CF_(4),exhib...While the C_(4)F_(7)N is an environmental-friendly insulation gas with a strong potential to replace SF_(6) in the insulation devices,its decomposed species,especially C_(2)F_(6),C_(3)F_(8),C_(3)F_(6),and CF_(4),exhibit a strong toxicity and poor insulation performance.In this paper,we propose calcium sulfate(CaSO_(4))as a promising gas adsorbent to scavenge such four toxic species in order to guarantee the safe operation of C_(4)F_(7)N-based insulation devices.Experimental findings show that CaSO_(4) behaves a strong adsorption performance upon the moisture inner the devices and achieves dynamic equilibrium at about 70 h.The adsorption behavior upon four gases is in order of C_(2)F_(6)>CF_(4)>C_(3)F_(8)>C_(3)F_(6) with the adsorbed gas content ranging at 1.5~9 ppm.Theoretical results illustrate that CaSO_(4)(010)surface behaves physisorption upon four toxic gases with Ead ranging at -0.77 to -0.67 eV,and its electronic behavior changes are consistent with the order of QT.Both aspects indicate the strong potential of CaSO_(4) as a promising scavenger for moisture removal,toxic gas sweeping and safe operation of C_(4)F_(7)N-based insulation devices.Our study puts forward a novel adsorbent for toxic gas removal in the gas insulation devices and can stimulate some other cuttingedge researches about adsorbent exploration in this field.展开更多
基金supported by National Natural Science Foundation of China(No.51977159).
文摘While the C_(4)F_(7)N is an environmental-friendly insulation gas with a strong potential to replace SF_(6) in the insulation devices,its decomposed species,especially C_(2)F_(6),C_(3)F_(8),C_(3)F_(6),and CF_(4),exhibit a strong toxicity and poor insulation performance.In this paper,we propose calcium sulfate(CaSO_(4))as a promising gas adsorbent to scavenge such four toxic species in order to guarantee the safe operation of C_(4)F_(7)N-based insulation devices.Experimental findings show that CaSO_(4) behaves a strong adsorption performance upon the moisture inner the devices and achieves dynamic equilibrium at about 70 h.The adsorption behavior upon four gases is in order of C_(2)F_(6)>CF_(4)>C_(3)F_(8)>C_(3)F_(6) with the adsorbed gas content ranging at 1.5~9 ppm.Theoretical results illustrate that CaSO_(4)(010)surface behaves physisorption upon four toxic gases with Ead ranging at -0.77 to -0.67 eV,and its electronic behavior changes are consistent with the order of QT.Both aspects indicate the strong potential of CaSO_(4) as a promising scavenger for moisture removal,toxic gas sweeping and safe operation of C_(4)F_(7)N-based insulation devices.Our study puts forward a novel adsorbent for toxic gas removal in the gas insulation devices and can stimulate some other cuttingedge researches about adsorbent exploration in this field.
