Numerical Analyses of Competitive-Consecutive Reactions in Microreactors
Numerical Analyses of Competitive-Consecutive Reactions in Microreactors
复制标题
微反应器中竞争连续反应的数值分析
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
M. Oda
中科院分区：
文献类型：
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作者：
Kawamura Tsutomu;Tomofumi Shiraishi;M. Oda
对层流中的竞争-连续反应进行了数值分析，以阐明微反应器提高产品收率的机理。对组分守恒方程进行了无量纲化，得到了微通道内流动和反应的无量纲数。导出了三个无量纲数：佩克莱数Pe，即，扩散时间与对流时间之比，混合反应数φ，即，扩散时间与反应时间之比，以及K，即，次级反应速率常数与初级反应速率常数之比。对微通道内多层层流竞争-连续反应的数值分析结果表明，当Pe > 10时，对流比扩散更占主导地位时，初级反应的产物产率取决于φ和K。使用φ和K绘制了评价产物产率的图表。产物收率随φ和K的减小而增加。
Numerical analyses were conducted for competitive-consecutive reactions in laminar flow to clarify the mechanism responsible for improvements to product yield with microreactors. The conservation equations of species were non-dimensionalized to derive the dimensionless numbers that governed the flow and reaction in microchannels. Three dimensionless numbers were derived: Peclet number Pe, i.e., the ratio of the diffusion time to the convection time, mixing-reaction number φ, i.e., the ratio of the diffusion time to the reaction time, and K, i.e., the ratio of the secondary reaction rate constant to the primary reaction rate constant. As a result of the numerical analyses of the competitive-consecutive reactions for multilayer laminar flow in microchannels, under conditions where convection was more dominant than diffusion Pe > 10, the product yield of the primary reaction depended on φ and K. A diagram to evaluate product yield was prepared using φ and K. The product yield increased with decreasing φ and K.