✍ Scribed by Abdul Rahman Garayhi; Uta Flügge-Hamann; Frerich Johannes Keil
No coin nor oath required. For personal study only.
the rest of the reactor. At a power dissipation per unit reactor volume of about 2 kW/m 3 the k L a-value in the impinging-zone is about 4 times and in the main reactor tube about 2.5 times of that in the rest of the reactor. This confirms once more the aforementioned statements.
The influence of the impinging-zone on the mass transfer performance of the impinging-stream reactor has been examined. The volumetric mass transfer coefficient has been determined by means of the steady state physical method. By using a model, which divides the reactor into three different sections, it became possible to examine the mass transfer in the impinging-zone and in the other sections separately. The experimental results for the individual sections confirm that the mass transfer in the impinging-zone at high power dissipation is much higher than in the other sections; the volumetric mass transfer coefficient in that section can be as high as 0.8 s ±1 at high gas flow rates. The mass transfer coefficient in the impinging-zone is about 4 times and in the main reactor tube about 2.5 times the value in the rest of the reactor at a high power dissipation. Thus, the mass transfer performance of the entire reactor at a power dissipation higher than 0.7 kW/m 3 is basically dictated by the impinging-zone.
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