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首页> 外文期刊>International Journal of Heat and Mass Transfer >Liquid-to-particle mass transfer in a micro packed bed reactor
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Liquid-to-particle mass transfer in a micro packed bed reactor

机译：微型填充床反应器中的液体到颗粒的传质

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摘要

The liquid-to-particle mass transfer in micro packed beds of different hydraulic to particle diameter ratio N and different channel geometries, i.e. circular and rectangular, was studied with the copper dissolution method. In this paper, we demonstrate that the shape of the channel has no influence on the liquid-to-particle mass transfer as long as N is constant. Moreover, higher Sherwood numbers were measured with increasing N for 4 < N < 24.4, but the opposite influence was observed for N < 4. In the case of N > 4 we highlight that the channeling effect, i.e. higher velocities in the wall region compared to the center of the packed bed, has a main impact on the mass transfer. For N < 4 the packed bed cross section cannot be differentiated anymore in a wall region and a center region, hence there is no wall effect and a better flow distribution through the packed bed cross section is induced which increases mass transfer, as proposed in this paper.
机译：使用铜溶解法研究了不同水力粒径比N和不同通道几何形状（即圆形和矩形）的微型填充床中的液-质传质。在本文中，我们证明了只要N为常数，通道的形状就不会影响液体至颗粒的传质。此外，对于4 4的情况下，我们强调了通道效应，即与壁区域相比具有更高的速度到填充床的中心，对传质有主要影响。对于N <4，填充床的横截面无法再在壁区域和中心区域进行区分，因此不会产生壁效应，并且会导致通过填充床横截面的流量分配更好，从而增加了传质。纸。

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