I have trouble with foam formation during preparing catalyst slurry in milling step in an industrial scale milling apparatus. do you know how I can solve this problem?
Thanks,
Foam usually occurs when using the wrong surfactants or organic binder. This happens, for example, if you pour hand-washing detergent into the washing machine instead of washing powder.
If you can't do without surfactants, you should take the one that forms as little foam as possible.
Thanks, dear Mr. Vadim Verlotski . We use alumina sol as the binder and a little acetic acid. Other materials are common to TWC catalysts. Are they foaming substances?
Dear Alireza Hadi,
I don't know which surfactants are used in TWC catalysts, but only these can cause foaming. May be that acetic acid increase the foaming caused by these surfactants, but acetic acid alone cannot cause foaming.
Hi Alireza Hadi ,
- You can search what "de-foamers" people usually use while making slurries of your material system. You can choose one of them.
- As Dr. Vadim Verlotski mentioned, the foam generation can also be reduced significantly by using an appropriate surfactant.
- You can use "rotary evaporator" after the mixing step to remove air bubbles.
- If you have access to "planetary centrifugal mixer", this equipment has a de-foaming option that you can use.
- If using ball-milling, take out the balls after ball-milling, and mix at a higher rpm for some hours and check the status.