Reactor volume; 300 mL
Reducing agent: Water with NaOH
I am saturating my solution overnight with 0,5 mL CO2 /min then i continuously introduce 3 mL/ min CO2 and 27 mL/min Helium during all the reaction with light turned on.
Dear Ard Koeken
1st of all, thank you for helping me.
I forgot to mention it, but during night i also inject Helium ( ~ 7 ml/min). The reaction vessel is magnetically stirred and it is not pressurized.
We introduce CO2 and He (during long periods at night) in order to assure that our solution is completely saturated of CO2.
According to our GC equipment, this strategy saturates the solution, seeing that we cannot observe any oscilation ( positive or negative) in the CO2 level during reaction.
However, in the literature, authors normally just inject CO2 during 30 or 60 minutes before turning lamp on ( starting reactions). Unfortunately, they do not refer the CO2 flowrate introduced in the reactors ( similar to ours), but they mention that the solution is fully saturated with just 30 or 60 minutes of CO2 injection.
I think i made myself clearer this time.
In sum, what i wanted to know was if there is a calculation or empiric way to calculate the CO2 flowrate and consequent injection time i need to saturate ~300 mL of 0,2 M NaOH solution and then turn my lamp on and convert CO2 into methanol or something else.
Once again, your help is precious and i really thank you for supporting me
Best Regards
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