Design issues for a small-scale fixed-bed catalyst evaluation apparatus.
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For small fixed-bed catalyst evaluation devices, how is the height-to-diameter ratio of the fixed bed determined? What is the maximum limit? What is the minimum value it cannot be less than, and what range is considered reasonable for the voltage drop? How long should the constant temperature section be to be reasonable? What is a reasonable linear velocity? I earnestly beg the seniors to provide an answer
The height-to-diameter ratio is determined based on the performance of the catalyst you need to evaluate. Of course, the inner diameter of the heating furnace also needs to be taken into consideration. It generally should not be too thick. Of course, the longer the constant-temperature phase, the better, but this is determined by the manufacturer of the electric furnace. As for the position or length of this constant-temperature phase, it can be tested using a hollow tube and a thermocouple.