Impact of seed loading ratio on the growth kinetics of mono-ammonium phosphate under isothermal batch crystallization
Impact of seed loading ratio on the growth kinetics of mono-ammonium phosphate under isothermal batch crystallization
复制标题
等温间歇结晶条件下晶种装载率对磷酸一铵生长动力学的影响
DOI：
10.1007/s11814-015-0173-0
复制
发表时间：
2016-02-01
影响因子：
2.7
通讯作者：
Ding, Yigang
中科院分区：
文献类型：
--
作者：
Long, Bingwen;Yang, Haotian;Ding, Yigang
定量研究了晶种负载率对磷酸一铵(MAP)等温间歇结晶生长动力学的影响。提出了一种直接参数估计方法，并利用我们的实验溶液浓度下降数据从一个简单的结晶模型中提取了生长动力学参数。该方法确保了所获得的全局最优参数，并且被发现对实验误差不那么敏感。40℃下结晶的MAP的线性生长常数kg和生长级数g分别在1,000-2,600μm·−-1和0.93-1.12范围内，均随晶种负载率的增加而显著降低，且kg2呈较强的线性下降趋势。有效晶化时间也随着晶种质量的增加而减小。该方法可以推广到研究其他操作变量，如温度和初始过饱和度对晶体生长速度的影响。
The effect of seed load ratio on the growth kinetics of Mono-ammonium phosphate (MAP) under isothermal batch crystallization was investigated quantitatively. A direct parameter estimation method was proposed and applied to extract the growth kinetic parameters from a simple crystallization model using our experimental solution concentration decline data. The method assured the globally best parameters to be obtained and was found less sensitive to experimental errors. The linear growth constants kgand the growth order g were found to be in the range of 1,000-2,600 μm·min−1and 0.93-1.12, respectively, for MAP crystallized at 40 °C. Both parameters decreased significantly with increase of seed load ratio and kgeven showed a strong linear decline trend. The effective crystallization time also decreased with the seed mass. The proposed methodology could be extended to study the effect of other operation variables such as temperature and initial supersaturation on the crystal growth rate.