Problems with ratefrac absorption!
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The ratefrac model is used to simulate absorption, and the reactions have also been defined; however, errors always occur. When using the ELECNRTL property data, the following error appears: ****PROPERTY PARAMETER ERROR ERRORS ENCOUNTERED IN CALCULATION OF LIQUID MIXTURE FUGACITY COEFFICIENTS USING OPTION SET ELECNRTL FOR PHIMX! Calculations stopped because of missing property parameters. Where exactly is the error occurring, or has the wrong property method been selected? ? When I use rk-soave, the calculation results are incorrect; the temperature at the liquid outlet is abnormally low, at -74 degrees. The feed temperature is basically at room temperature, so such results shouldn’t occur. Moreover, the outlet flow rate is higher than the inlet flow rate, which violates the law of conservation of mass. Thank you; could someone help me? I’m still a beginner and don’t know much about this yet
It is estimated that the first situation occurs because no reactions were set when you selected the electrolyte model
2# fangzhao1023: Electrolyte; a reaction was set up under reactions--chemistry, but the result of the first scenario still appeared
There is a problem with the property method; it is recommended to try using another property method for calculation. Or adjust the number of trays and the liquid-to-gas ratio.
4# gu*nchun888: When defining reactions, they can be defined either under ‘reactions’ or under ‘blocks’. Electrolytes also exist; what are the differences between these three ways of definition, and under what circumstances are they used? ? Thank you!
I encountered the same problem, but setting a reaction under blocks caused convergence, and the result was excellent! The specific reason remains unclear. Setting it in reactions also leads to convergence, but the results are not good; this might be related to the issue of global versus local settings