Aiming at the high temperature corrosion in a coal-fired boiler,the effect of H2S and SO2 on the corrosion of 12 CrlMoV under the water wall condition has been investigated by experiments.The results indicate that H2 ...Aiming at the high temperature corrosion in a coal-fired boiler,the effect of H2S and SO2 on the corrosion of 12 CrlMoV under the water wall condition has been investigated by experiments.The results indicate that H2 S can promote the corrosion significantly,and the coarse porous oxide film formed cannot stop the progress of corrosion.While SO2 presents little effect on the corrosion.The main composition of the surface of 12 CrlMoV corrosion products is Fe2 O3.With H2S in the atmosphere,the corrosion gradually develops into deeper layers by forming FeS,FeO and Fe2 O3 alternately.The corrosion rate is doubled for every 50℃ inerease in temperature at 400-500℃.展开更多
Photocatalytic H2 production and CO2 reduction have attracted considerable attention for clean energy development.In this work,we designed an efficient photocatalyst by integrating lamellar oxygen-doped carbon nitride...Photocatalytic H2 production and CO2 reduction have attracted considerable attention for clean energy development.In this work,we designed an efficient photocatalyst by integrating lamellar oxygen-doped carbon nitride(CNO)nanosheets into ZnIn2S4(ZIS)microflowers by a one-step hydrothermal method.A well-fitted 2D hierarchical hybrid heterostructure was fabricated.Under visible light irradiation,the ZIS@CNO composite with 40 wt%CNO(ZC 40%)showed the highest hydrogen evolution rate from water(188.4μmol·h-1),which was approximately 2.1 times higher than those of CNO and ZIS(88.6 and 90.2μmol·h-1,respectively).Furthermore,the selective CO production rates of ZC 40%(12.69μmol·h-1)were 2.2 and 14.0 times higher than those of ZIS(5.85μmol·h-1)and CNO(0.91μmol·h-1),respectively,and the CH4 production rate of ZC 40%was 1.18μmol·h-1.This enhanced photocatalytic activity of CNO@ZIS is due mainly to the formation of a heterostructure that can promote the transfer of photoinduced electrons and holes between CNO and ZIS,thereby efficiently avoiding recombination of electron-hole pairs.展开更多
基金supported by the National Key Research and Development Plan of China (No. 2018YFB0604203)
文摘Aiming at the high temperature corrosion in a coal-fired boiler,the effect of H2S and SO2 on the corrosion of 12 CrlMoV under the water wall condition has been investigated by experiments.The results indicate that H2 S can promote the corrosion significantly,and the coarse porous oxide film formed cannot stop the progress of corrosion.While SO2 presents little effect on the corrosion.The main composition of the surface of 12 CrlMoV corrosion products is Fe2 O3.With H2S in the atmosphere,the corrosion gradually develops into deeper layers by forming FeS,FeO and Fe2 O3 alternately.The corrosion rate is doubled for every 50℃ inerease in temperature at 400-500℃.
基金supported by the National Natural Science Foundation of China(21503096,21407067)the Natural Science Foundation of Educational Committee of Anhui Province(KJ2018A0387),ChinaProject of Anhui Province for Excellent Young Talents in Universities(gxyq2019029),China
文摘Photocatalytic H2 production and CO2 reduction have attracted considerable attention for clean energy development.In this work,we designed an efficient photocatalyst by integrating lamellar oxygen-doped carbon nitride(CNO)nanosheets into ZnIn2S4(ZIS)microflowers by a one-step hydrothermal method.A well-fitted 2D hierarchical hybrid heterostructure was fabricated.Under visible light irradiation,the ZIS@CNO composite with 40 wt%CNO(ZC 40%)showed the highest hydrogen evolution rate from water(188.4μmol·h-1),which was approximately 2.1 times higher than those of CNO and ZIS(88.6 and 90.2μmol·h-1,respectively).Furthermore,the selective CO production rates of ZC 40%(12.69μmol·h-1)were 2.2 and 14.0 times higher than those of ZIS(5.85μmol·h-1)and CNO(0.91μmol·h-1),respectively,and the CH4 production rate of ZC 40%was 1.18μmol·h-1.This enhanced photocatalytic activity of CNO@ZIS is due mainly to the formation of a heterostructure that can promote the transfer of photoinduced electrons and holes between CNO and ZIS,thereby efficiently avoiding recombination of electron-hole pairs.
