Do chlorine and ammonia present in the air have an impact on the hydrogen peroxide working solution, and do they cause poisoning of the palladium catalyst?
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Dear teachers, we have suddenly encountered a problem in production and would like to ask for your advice The specific situation is as follows: In the production of hydrogen peroxide, if gases such as chlorine and ammonia suddenly appear in the air used for the oxidation reaction, will this have any adverse effects on the working solution, and could it poison the palladium catalyst? A reward of 30 wealth points is available; please reply promptly. Thank you!
It seems there should be an impact; I can’t explain the specific reason, and experts need to provide an answer.
Experts, WHO? Please provide support. Thank you. . . . . . . . . . . . . . .
There might not be many people who understand this. . .
I have worked with palladium-on-carbon catalysts, and chloride ions generally have an impact, as they can cause catalyst poisoning
Okay, thank you. Give a specific explanation, haha.
When this chloride ion concentration reaches a certain level, it can cause catalyst poisoning. In the case of poisoning, if the condition is not severe, one can try increasing the amount of catalyst to make adjustments ； If the chemical reaction rate is too slow, it can only be recovered and reprepared. One step in the recovery process of palladium-on-carbon catalysts involves the use of ammonia water, which is used for complexation in order to remove impurities.
Thank you, the analysis is good; I appreciate it once again.
Oxidation reactions maintain acidity, while ammonia leads to alkalinity, which will certainly cause side reactions in the working solution； Hydrogen peroxide catalysts have specific requirements regarding chlorine in hydrogen specifications.
2nd.2-Ethylanthraquinone: Chlorine content: ≤25ppm. This catalyst is a renewable catalyst; care should be taken to ensure that its free fall distance does not exceed 500 mm when it is installed. During production, process parameters such as the temperature of the hydrogenation reaction, as well as the moisture and alkalinity levels of the working fluid, must be strictly controlled in order to prevent catalyst deactivation.
Ammonia has a lesser impact, while chlorine and carbon monoxide are more toxic; they cause irreversible damage to the palladium catalyst. Chlorine and carbon monoxide in the air are drawn into the air compressor and then into the oxidation tower, where some of them dissolve in the working fluid and subsequently enter the hydrogenation tower, thereby affecting the palladium catalyst