In order to obtain CO2 gas, I used two powder such as sodium hydrogen carbonate(NaHCO3) and citric acid(C6H8O7). Two powders are mixed by water for making aqueous solution. However, reaction time is too long for my use.
As you know, there are many method to promote reaction time such as increase surface area by grind reaction powder, temparature of the fluids and employing catalysts. For my use, prior two methods are not proper, and but catalysts employment may be proper. Although use of catalysts is adequate way, I couldn't find which material is proper for above acid-base reaction until now. I worried about that proper material doesn't exist.
Let me know whether there are proper catalyst or not.
Additionally, as you can, I hope to know reaction time contant(k) between recommanded material and above reaction.
Thank you.
Dongkyu Lee.
The reactions between acid(s) and base(s) are extremely fast in solutions and do not require any catalyst. Use whatever liquid acid, e.g. acetic. Be very carefull, the reaction may proceed violently.
Dear. Yurii V Geletii
Thank you for your reply. I understood your comment, however, the reaction should be more faster for my use. Is there any ohter method to increase reaction speed?
Dear. Rogerio Klupperl
I'm sorry to miss some condition. I used two power as a liquid state immediately.
Please, learn how to ask and to reply questions. "I used two powDERS as a liquid state" Powders can never be in "liquid states.
Use Na2CO3 at higher concentrations, add liquid acetic acid. Be CAREFULL, the reaction proceeds violently!
Dear. Yurii V Geletii
It seemed that I make misunderstanding factors at the above sentence. In detail, I stock two powder in a chamber, and inject some water. In other words, I make aqueous solution to make reaction each other, not liquid state.
Never ever ignore even minor corrections.
"I stock two power in a chamber"
Inject pure acetic acid into a chamber with sodium carbonate.Be CAREFULL, the reaction proceeds violently!
Since the message was written using smartphone, the mistake would be happened. Not power, but powder.
Dear Dongkyu Lee, it is true that the reaction of acids and bases ist very fast. The problem that you encounter however is real. The slow part of the reaction that you observe is the formation of CO2 gas and that is indeed surprisingly slow. If it were not slow you would loose all the CO2 immediately when you open a bottle of beer, coke, carbonated mineral water etc. Nature has that problem also and it has solved that problem by inventing the catalyst carbonic anhydrase. Nearly all living organisms use carbonic anhydrase. Wikipedia will give you more information: https://en.wikipedia.org/wiki/Carbonic_anhydrase. I hope that my comment has answered your question.
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