Method for controlling the pH of quench water during the passivation of sulfur hydrogenation catalysts
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Dear experts, the unit needs to be shut down for the passivation of the hydrogenation catalyst. Since this is the first time we are performing such passivation, we have no prior experience with it. I hope to get everyone’s help regarding passivation schemes for catalysts and pH control schemes for quench water. The pH control of quench water is particularly challenging. What I know so far is that ammonia (whether liquid ammonia or aqueous ammonia) is added during this process; however, I would like to know if there are any other precautions or risks associated with this procedure. During passivation, can sodium hydroxide be used to adjust the pH? Will it have any effect? We hope that experts with relevant experience can provide detailed plans. Please send them to the QQ email address: 278871536@qq.com. Thank you very much!
Ammonia water injection: Ammonia water injection is a very common practice in sulfur quench water treatment; all that’s needed is to control the pH value. It’s best to have an online pH meter; if not, you’ll need to frequently test the pH using pH test strips. It is important to ensure that the location where the pH value is measured is representative.