Intensifying micromixing in a semi-batch reactor using a Rushton turbine
Intensifying micromixing in a semi-batch reactor using a Rushton turbine
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使用 Rushton 涡轮机在半间歇式反应器中强化微混合
DOI：
10.1016/j.ces.2004.10.041
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发表时间：
2005
影响因子：
4.7
通讯作者：
A. Nienow
中科院分区：
文献类型：
--
作者：
M. Assirelli;W. Bujalski;A. Eaglesham;A. Nienow
采用“碘化物-碘酸盐”反应模型，研究了半间歇式反应器中，当进料管旋转，出料管连续进入局部比能耗散率εT最高的区域时，微观混合的有效性。将结果与使用固定管在等效位置和在其他位置（包括靠近顶面，工业上最方便的位置）获得的结果进行比较。结果显示，显著的强化，即，在最方便的固定进料管位置和旋转管之间，即使在1.0W/kg的适度比功率输入下，“废物”也减少了七倍。这种添加模式还确保进料总是进入恒定的εT值，而在靠近叶轮的静态管道中，反应物在ε T周期性变化的区域中进料。这两种添加模式所经历的ε T值的差异对文献中将选择性与局部比能量耗散率联系起来的先前微观混合模型提出了问题。
The ‘iodide–iodate’ reaction scheme has been used to ascertain the effectiveness of micromixing in a semi-batch reactor when feeding with pipes rotating and discharging continuously into the region of highest local specific energy dissipation rate, εT. The results are compared with those obtained using a fixed pipe at the equivalent position and at other positions including near the top surface, the most convenient position industrially. The results show significant intensification, i.e., a seven-fold reduction in ‘waste product’, between the most convenient fixed feed pipe position and the rotating pipes, even at the modest specific power input of ∼1.0W/kg. This mode of addition also ensures that feeding is always into a constant value of εT, whereas with a static pipe close to the impeller the reactants are being fed in a region where εTvaries cyclically. This difference in the εTvalues experienced by the two modes of addition poses problems for previous models of micromixing in the literature linking selectivity to local specific energy dissipation rates.