How to look up the properties of ammonia water?
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I have a question for those who use Aspen: when using Aspen to determine the physical properties of ammonia mixtures, especially properties such as enthalpy and specific heat, which property calculation method is relatively more accurate? ELECNRTL or RK-SOAVE or other methods?
The ELECNRTL RK-SOAVE equation is generally used for electrolyte solutions to deal with petroleum products at high pressures...
Reply to 2# wuwei0427: It should be the case as mentioned, but based on the results of these two tests, and when compared with other relatively accurate software programs, both values are quite close to each other. I’m not sure if there are any alternatives that can provide more accurate properties for ammonia solutions. .
This post was last edited and replied to by wuwei0427 on 2010-8-25 22:41. Reply 3# yulei1987: PITZER is a model for the electrolyte activity coefficient based on aqueous solutions, and it can accurately calculate the properties of aqueous electrolyte solutions with ion concentrations below 6 molar strength. I’m not sure if your ammonia concentration exceeds 6M; you can try using this property-based method to check........
Reply to 4# wuwei0427: I have ammonia water with a quality concentration of 71%. . The molar ratio is over 6%, right? // I wonder if other experts have any suggestions
For NRTL, I’ve seen many articles on ammonia water, and this is generally the one recommended
Do you have data on the density of ammonia? And you can compare that specific heat data with the values in the manual; you’ll find some differences