热解产物MgO颗粒形貌对收率的影响

热解工艺制备的MgO颗粒形貌各异，粒径分布不均.传统的数值模拟过程假设产物为同粒径的标准球形颗粒，与实验结果存在一定的误差.因此， 以射流热解制备MgO过程为研究对象，引入伸缩因子等参数，研究了几种特殊的非规则MgO颗粒在射流热解反应器出口的分布，对比标准球形颗粒的分布结果进行讨论.结果表明:收缩因子α、丰满指数k及放缩径比β共同作用影响着MgO的收率.当α=-0.25，k=1，β=1时，MgO的收率较高，为96.88%;当α=0.25，k=2，β=1.5时，MgO的收率较低，为80.39%.

Influence of the Granule Morphology of MgO Particles on the Yield of Pyrolysis Products

The MgO particles prepared by pyrolysis process possess different morphologies and uneven size distribution of the particles. There are some errors from the traditional numerical simulations to the experimental results， where the particles assume to be the standard spherical and same-sized particles. Therefore， an extension factor (α)， fullness factor (k) and shrinkage ratio (β) are introduced to characterize the distributions of several specific types of irregular MgO particles inside a jet-flow pyrolysis reactor. All three parameters are found to affect the yield of MgO particles greatly. When the parameters of α， k and β are -0.25， 1 and 1， respectively， the yield is maximum with a value of 96.88%， while it becomes a lower one of 80.39%， corresponding to α=0.25， k=2 and β=1.5.