What do you mean with "BUT, CLO2 gas loves cold water!" ?
It hardly evaporates at all in that temperature. So I am wondering. Have you compared the efficacy of CDs production in ambient temperature vs refrigerator temperature, using exact same parts and quantities?
"Back in the day" when we used to use Andreas' heating, tubing and bottles method of making CDS (which tended to explode from time-to-time), we used cold water in the bottles because more CLO2 would end up in the water and less in the air (the last bottle in the chain had to be vented). CLO2 has a natural affinity for cold water vs warm water. It also tends to stay in solution when the water temperature is 50F or below.
This is why making CDS in a fridge works, even though the reaction is slower, needing more time to complete.
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