Treatment methods for high alkali content in hydrogen gas
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Hydrogen has a high alkalinity content, so the pH of the water in the scrubber tower is adjusted to 4. The alkali content is still high; the decrease isn’t significant. Are there any other ways?
What is the purpose of lowering PH?
Wash with spray water, using multiple-layer nozzles.
Hydrogen has a high alkalinity level. I understand what you mean: there is water present in the hydrogen, which results in a high pH value. As a result, users who use this hydrogen later on are unable to use it because of the high alkalinity. High alkalinity in hydrogen is essentially due to the presence of water in it. It’s necessary to check whether the hydrogen is dry; once it’s dry, there will be no problems. In particular, it’s important to check the gas-liquid separation tank and the water mist collector
First, what is the quality of the water used for washing, and how effective is the spraying? It is recommended to use deionized water (high-purity water), as it will not clog the nozzles and provides an effective cooling effect during cleaning ； Increasing the cooling capacity of the cooler helps to reduce the amount of alkaline water carried in the hydrogen gas, and enhancing the mist capture system for removing alkaline substances allows the level of alkalinity in the hydrogen gas to be brought under control.
Could the poster check by taking a sample of the condensate from the hydrogen main pipe and analyzing its alkalinity level? You are currently using acidic water to neutralize the alkaline condensate in order to wash the hydrogen ! It is common to replace the washing and cooling water; the replaced water is then recycled as salt. If the concentration of alkali in the condensate is very high, it is necessary to first check the gas-liquid separation system after the electrolyzer to determine whether there is an issue with incomplete separation of liquid from gas.