I have solid graphite rod and I want to make it porous, is their any chemical or physical treatment for that ?

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Pratama Jujur Wibawa

Chemically, you can try to react it with aqua regia solution for various time. Physically, you can heating it at close to its melting point.

Jayesh M Sonawane

Thanks sir,

Can you please check attached link, page no 10. they have showed that at 2500K, structure is more uniform. May I treat at this temp ? Please suggest.

Thanking you,

Regards,

- Jayesh

Alain Celzard

Which kind of porosity do you want to obtain: macro, meso, micro ? Graphite is not easily chemically activated, at least the binder will be but not the graphite itself.

Alain

Dear Alain sir,

I want obtain mesoporosity, please help me.

Thank you.

Mesoporosity can be obtained by using impregnation with H3PO4 (85% solution) at 550°C or with molten KOH at 800°C. However, as I said, we'll more likely activate the binder than the graphite itself. Just try, and you'll see what happens.

Could you please tell me procedure for microporosity as well ? I want to compare both in terms of system performance.

Thanks for your answers.

Microporosity can be obtained by gasification in a stream of water vapour at 850°C, or of CO2 at 900°C. But graphite for sure will remain unreacted, only the binder will be made porous.

Thank you sir, I will try both.

Saad Saadsaad

Dear Jayesh

Interesting to your question I want to ask the result of last year experiments as "impregnation in H3PO4 (85% solution) at 550°C or in molten KOH at 800°C" or "gasification in a stream of water vapour at 850°C, or of CO2 at 900°C".

If it is possible say what happened.

Thanks a lot