Hiden Isochema Ltd’s Post

Happy to share our recent publication in Chemical Engineering Journal (CEJ). A new adsorbed phase activity coefficient model is presented that can be implemented to model nonideal adsorption behavior. The model is derived and shown to exhibit end behavior that is consistent with adsorption thermodynamics. Over 20 systems are collected from literature, which include adsorbents and adsorbates having various properties over a range of different temperatures and pressures. Four different thermodynamic consistency tests are used to confirm the quality of all adsorption data, the new model is fit to experimental activity coefficients, and both nonideal binary and ternary adsorption behavior is predicted with good accuracy. The possibility to develop predictive correlations for the model fitting parameters based on their theoretical basis is also discussed. New binary adsorption data are additionally presented across three different temperatures and two different pressures for HFC-125/HFC-32 with zeolite H-ZSM-5. The data were collected using a unique instrument that integrates a XEMIS microbalance from Hiden Isochema Ltd and a Dynamic Sampling Mass Spectrometer (DSMS) from Hiden Analytical, making it possible to implement the Integral Mass Balance (IMB) method. https://lnkd.in/gcNnnCXS