Calculation method for preparing ammonia solution from liquid ammonia
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I want to calculate the heat release or temperature increase that occurs during the process of dissolving liquid ammonia in water to prepare ammonia solution. I thought it would be simple, but after adding a mixer, the calculation doesn’t work anymore. I’m not sure which PROPERTY to choose, or whether there’s something I’ve overlooked
What software are you using? If it’s ASPEN, the NRTL equation should be used.
Select an electrolyte model. For the electrolyte model, it is recommended to first check whether there is a suggested model in A+. If not, parameter estimation should be carried out based on values from literature. However, a+ provides models for common substance systems (H2S, H2SO4, HNO3, CO2, SO2, NO2, NH3, etc.), which is very convenient. I did the calculations: at 1 bar, when 9.5 moles of water at 25 degrees Celsius are mixed with 1 mole of liquid ammonia at -34 degrees Celsius, the temperature becomes 34 degrees Celsius
I’ve seen others use the electrolyte model... Try using NTRL and the electrolyte model.
Same question: but ammonia dissolves in water to form hydrates – should a reaction equation be established?