Regarding water vapor in electrolytic chlorine production
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As the title suggests, this is my first time dealing with this topic. How do I calculate the amount of water vapor contained in the chlorine gas produced through electrolysis? I looked up the specific volume of saturated water vapor at 30 degrees Celsius, and it’s approximately 28 m3/kg. If I don’t understand specific volume, then is the volume of steam at this temperature equal to the amount of chlorine multiplied by the specific volume?
Specific volume is not useful; find the vapor pressures of chlorine and water at 30 degrees, and the ratio of these two values is the volume ratio
Thank you for your reply. I also wanted to ask whether the water vapor content in this table can be found directly? Should the water vapor content be calculated based on the water vapor content in 10.8 g/kg of chlorine gas?
There should be no problems with this table. Industries such as the chlor-alkali industry and the sulfuric acid industry have a long history; there is professional research conducted, and various data sheets and reference materials are available for use. Additionally, I think that when removing water, in addition to water vapor, the liquid water carried by the air flow also needs to be taken into account
Well, now I just don’t know how to calculate the amount of liquid water trapped within. Wet chlorine gas is cooled from 30 degrees to around 10 degrees using a cooler, which removes most of the water vapor. It’s unclear how to calculate the amount of vapor before and after cooling; should it be calculated based on the saturated vapor pressure at the corresponding temperatures?
Just calculate the difference based on the values in the table. The situation with liquid water is uncertain, as there are significant differences in actual production conditions
Haha, isn’t this climbing onto the little bear image?
\ud83d\ude04, I don’t know how the image appeared
While doing the calculations today, I thought of another question: when the temperature drops, does the water vapor in wet chlorine gas undergo a phase change? Do I need to take into account the conversion of steam into liquid water when calculating this amount of heat? Or is it calculated based on the amount of liquid water that has been reduced? I’m very confused right now
The decrease in moisture content caused by temperature changes is, of course, due to phase change. When calculating heat, the heat due to temperature differences and the heat associated with phase changes must be taken into account. For such problems, it is necessary to refer to principles of chemical engineering and also study a paper that includes examples of calculations as a reference*