The modified Fluid and Solid reaction model and experimental verification
The modified Fluid and Solid reaction model and experimental verification
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DOI：
10.1063/1.3366369
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发表时间：
2010-03
期刊：
影响因子：
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通讯作者：
Na Li;Qulan Zhou;T. Xu;S. Hui;Qinxin Zhao
中科院分区：
文献类型：
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作者：
Na Li;Qulan Zhou;T. Xu;S. Hui;Qinxin Zhao
收缩核模型(SCM)在许多研究中被广泛用于模拟流固反应。在考虑颗粒大小分布(PSD)和产物特性的缩核模型的基础上，建立了一个修正的模型来模拟流体和固体的反应过程。石灰石的溶解是典型的液固反应，对中国不同产区的五种石灰石进行了实验研究。可以预测石灰岩的溶解过程。在模型中，定义了综合反应系数k和总反应速率常数Km两个参数。通过选取合适的数值，该模型能较好地描述石灰石在酸中的溶解过程。此外，Km依赖于流体中的传质和化学反应，而与固体和流体的性质无关。K和Km可以用数值方法从实验结果推算出来，在相同反应条件下，不同样品的Km是相似的。该模型建立了一个新的模型，并对模型进行了验证。
The shrinking core model(SCM) is widely used to model fluid‐solid reaction in many studies. Based on the shrinking core model incorporated particle size distribution(PSD) and the characteristic of products, a modified model has been set to simulate the reaction process of fluid and solid. Limestone dissolution is a typical liquid‐solid reaction, and experimental work has been done with five kinds of limestone from different producing area in china. The dissolution process of limestone can be predicted. In the model, two parameters the comprehensive reaction coefficient k and total reaction rate constant km are defined. By chosen proper value, the model can well describe the limestone dissolution process in acid. Furthermore, km is dependent of mass transfer in fluid and chemical reaction but independent of properties of solid and fluid. k and km can be deduced from experimental results by numerical method, and km is similar for different samples with the same reaction condition. The model established a re...