Analysis of the high methanol content at the bottom of the methanol-to-hydrogen washing tower
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Our facility has just started operations. It has been found that the methanol content in the wash tower is relatively high. At the beginning, it was less than 5%. The current content is above 10%. What causes this? How to handle it. I would like to ask the teachers. . .
Is the water-to-alcohol ratio inappropriate, or is the methanol flow meter inaccurate?
A low reaction temperature and a low water-alcohol ratio are both possible causes
I think it’s because the amount of methanol is too high; as a result, the excess methanol remains at the bottom of the wash tower. The methanol-water solution at the bottom of the wash tower is sent back to the methanol feed pump, thereby increasing the methanol content further. That’s why it increased from 5% to 10%; if the feed rate isn’t adjusted, the percentage of methanol at the bottom of the scrubber will increase further, right?