根据幂指函数g(u)=ua+bu的特点,借用"虚拟反应组分"和"变动级数"的概念,提出了管式反应器系统中反应转化率与工艺条件的关系式XM=1-exp[-exp(A+B/Tr+CTr)Prnpo+np1prτr multiply from i=1 to m yinyo+ny1yi]为了...根据幂指函数g(u)=ua+bu的特点,借用"虚拟反应组分"和"变动级数"的概念,提出了管式反应器系统中反应转化率与工艺条件的关系式XM=1-exp[-exp(A+B/Tr+CTr)Prnpo+np1prτr multiply from i=1 to m yinyo+ny1yi]为了验证该转化率方程的普适性,考察了二乙苯催化脱氢、乙苯加氢和噻吩加氢脱硫等,并利用Matlab软件分别对这三个催化体系的实验数据进行拟合.结果表明,此方程在较宽的范围内均能很好地反映温度、反应压力、空速和物料比对转化率的影响.预测结果与实验数据之间的总平均相对偏差均小于2%,说明该方程并不是针对某一特定的催化反应或催化剂,可用于大多数的管式反应器催化反应系统中.展开更多
Up-conversion charging(UCC)is a promising approach for charging storage phosphors using low-energy excitation light sources.For further understanding the UCC,research on the competition between trapping and detrapping...Up-conversion charging(UCC)is a promising approach for charging storage phosphors using low-energy excitation light sources.For further understanding the UCC,research on the competition between trapping and detrapping during illumination is essentially required.Here we demonstrate the effect of detrapping on UCC dynamics by a rate equation approach.Accordingly,taking LaMgGa_(11)O_(19):Pr^(^(3+))phosphor as an example,we experimentally verified the dependence of illumination dose and duration on the thermoluminescence intensities using 450 nm laser excitation.The present model and experimental approach appear to be transferable to other phosphors,Thus,many existing persistent phosphors can now be revisited,paving the way toward advancing the understanding of UCC.展开更多
基金Supported by the National Basic Research Program of China (973 Program, 2010CB226903)
文摘根据幂指函数g(u)=ua+bu的特点,借用"虚拟反应组分"和"变动级数"的概念,提出了管式反应器系统中反应转化率与工艺条件的关系式XM=1-exp[-exp(A+B/Tr+CTr)Prnpo+np1prτr multiply from i=1 to m yinyo+ny1yi]为了验证该转化率方程的普适性,考察了二乙苯催化脱氢、乙苯加氢和噻吩加氢脱硫等,并利用Matlab软件分别对这三个催化体系的实验数据进行拟合.结果表明,此方程在较宽的范围内均能很好地反映温度、反应压力、空速和物料比对转化率的影响.预测结果与实验数据之间的总平均相对偏差均小于2%,说明该方程并不是针对某一特定的催化反应或催化剂,可用于大多数的管式反应器催化反应系统中.
基金Project supported by the National Natural Science Foundation of China(11774046)the Department of Science and Technology of Jilin Province(20180414082 GH)。
文摘Up-conversion charging(UCC)is a promising approach for charging storage phosphors using low-energy excitation light sources.For further understanding the UCC,research on the competition between trapping and detrapping during illumination is essentially required.Here we demonstrate the effect of detrapping on UCC dynamics by a rate equation approach.Accordingly,taking LaMgGa_(11)O_(19):Pr^(^(3+))phosphor as an example,we experimentally verified the dependence of illumination dose and duration on the thermoluminescence intensities using 450 nm laser excitation.The present model and experimental approach appear to be transferable to other phosphors,Thus,many existing persistent phosphors can now be revisited,paving the way toward advancing the understanding of UCC.
