Preparation of palladium-carbon catalysts
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We are planning to prepare 2T palladium-on-carbon catalysts in the near future, but in the traditional manufacturing process, a large amount of water is used for the pretreatment of activated carbon. The process involves acid washing, followed by rinsing to remove carbon powder, vacuum filtration, and washing until the solution reaches a neutral pH. In this process, water is used entirely to wash the acidic material to neutrality, and a very large amount of water is required. I hope those among my friends from Sichuan who are engaged in research in this field can offer some guidance. Thank you
Changing activated carbon from an acidic state to a neutral state requires a large amount of water. Moreover, due to its highly developed pore structure, the acids adsorbed within these pores are difficult to remove, resulting in a state of \"apparent neutrality\".
I have been working with palladium-on-carbon catalysts for many years, and I think there are problems with your manufacturing process. You can contact zj10427@sohu.com
I feel the same way; I also worked with this catalyst for a while during my graduate studies. I would like to ask what kind of reaction you are carrying out, and to what extent does acid treatment improve the reactivity of this reaction. Personally, I believe that after acid treatment, the loading amount of palladium decreases significantly, given the same particle size and quantity of activated carbon. Moreover, for a reaction I worked on previously, acid treatment of the activated carbon was not useful at all. Do not place undue trust in the acid treatment processes mentioned in the literature.
Reply to 4# SYK7786294: Activated carbon pretreatment can generally be carried out using oxidants; using acids is just one method. However, I have not heard that acid treatment affects the palladium loading rate. Could you please provide more detailed information on this?
Activated carbon pretreatment can generally be carried out using oxidants; using acids is just one method
By acid treatment, I mean treatment with oxidizing acids. It is mainly nitric acid. But it definitely affects the loading of palladium. Other oxidants such as hydrogen peroxide have little effect on the loading amount of palladium, but they also have little impact on the reaction I am conducting (confidential). Hehe.
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Dear experts upstairs, may I ask which company you usually purchase activated carbon from when making palladium-carbon catalysts? If possible, could you also share their contact information? Thank you very much!
Hello, does your company need to dispose of spent palladium catalysts? 15057256688 is the same WeChat ID