AIM: A User-friendly GUI Workflow program for Isotherm Fitting, Mixture Prediction, Isosteric Heat of Adsorption Estimation, and Breakthrough Simulation

Abstract: Adsorption breakthrough modeling often requires complex software environments and scripting, limiting accessibility for many practitioners. We present AIM, a MATLAB-based graphical user interface (GUI) application that streamlines fixed-bed adsorption analysis through an integrated workflow for isotherm fitting, heat of adsorption estimation, mixture prediction, and multicomponent breakthrough simulations. AIM's intuitive GUI requires no coding and supports a broad isotherm library (e.g., Langmuir, Toth, Dubinin-Astakhov, Structural-Transition-Adsorption). It also enables non-isothermal breakthrough simulations with axial dispersion. Case studies, such as Xe/Kr breakthrough curves in SBMOF-1, closely match the results from other software applications, such as RUPTURA. Mixture predictions can be done using the Ideal Adsorbed Solution Theory (IAST) and Extended Langmuir models, while isosteric heats are derived from Clausius-Clapeyron or Virial equations. Users can export detailed column and outlet profiles (e.g., composition, temperature) in multiple formats, enhancing reproducibility and data sharing among practitioners.