An isothermal operation is implemented by employing a thermogravimetric analyzer (TGA) for simulating the thermal decomposition behavior of 58μm pine sawdust in air atmosphere.An independent parallel reaction model i...An isothermal operation is implemented by employing a thermogravimetric analyzer (TGA) for simulating the thermal decomposition behavior of 58μm pine sawdust in air atmosphere.An independent parallel reaction model is adopted in this study to describe the thermal decomposition mechanism.The Weibull distribution function is used to record and analyze the weight loss during isothermal decomposition at different temperatures(500,600,700,and 800°C).The total weight loss of the pine sawdust is assumed as a linear combination of individual weight loss from three components,including the char and two volatile matters.The plot of the thermal decomposition rate curve leads to kinetic parameters such as the reaction rate constants and the reaction order.The results show that the Weibull distribution function successfully represents decomposition curves of three components,and fits the experimental data very well.Therefore,this study provides a simple way to evaluate the decomposition rate of biomass combustion in a real combustor.展开更多
We argue that the topological charge density wave phase in the quasi-2D Kagome superconductor AV3Sb5 is a chiral flux phase.Considering the symmetry of the Kagome lattice,we show that the chiral flux phase has the low...We argue that the topological charge density wave phase in the quasi-2D Kagome superconductor AV3Sb5 is a chiral flux phase.Considering the symmetry of the Kagome lattice,we show that the chiral flux phase has the lowest energy among those states which exhibit 2×2 charge orders observed experimentally.This state breaks the time-reversal symmetry and displays anomalous Hall effect.The explicit pattern of the density of state in real space is calculated.These results are supported by recent experiments and suggest that these materials are new platforms to investigate the interplay between topology,superconductivity and electron–electron correlations.展开更多
基金Supported by the Chung Yuan Christian University (CYCU-97-CR-CE)
文摘An isothermal operation is implemented by employing a thermogravimetric analyzer (TGA) for simulating the thermal decomposition behavior of 58μm pine sawdust in air atmosphere.An independent parallel reaction model is adopted in this study to describe the thermal decomposition mechanism.The Weibull distribution function is used to record and analyze the weight loss during isothermal decomposition at different temperatures(500,600,700,and 800°C).The total weight loss of the pine sawdust is assumed as a linear combination of individual weight loss from three components,including the char and two volatile matters.The plot of the thermal decomposition rate curve leads to kinetic parameters such as the reaction rate constants and the reaction order.The results show that the Weibull distribution function successfully represents decomposition curves of three components,and fits the experimental data very well.Therefore,this study provides a simple way to evaluate the decomposition rate of biomass combustion in a real combustor.
基金supported by the National Program on Key Basic Research Project of China(973 Program)(2017YFA0303100)the National Natural Science Foundation of China(11888101)+2 种基金the Strategic Priority Research Program of Chinese Academy of Sciences(XDB28000000)the support from the start-up grant of IOP-CASsupported by the U.S.Department of Energy,Basic Energy Sciences Grant No.DE-FG02-99ER45747。
文摘We argue that the topological charge density wave phase in the quasi-2D Kagome superconductor AV3Sb5 is a chiral flux phase.Considering the symmetry of the Kagome lattice,we show that the chiral flux phase has the lowest energy among those states which exhibit 2×2 charge orders observed experimentally.This state breaks the time-reversal symmetry and displays anomalous Hall effect.The explicit pattern of the density of state in real space is calculated.These results are supported by recent experiments and suggest that these materials are new platforms to investigate the interplay between topology,superconductivity and electron–electron correlations.
