TY - JOUR ID - 5800 TI - The Generalized Maxwell-Stefan Model Coupled with Vacancy Solution Theory of Adsorption for Diffusion in Zeolites JO - Iranian Journal of Oil and Gas Science and Technology JA - IJOGST LA - en SN - 2345-2412 AU - Salehi, Seyyed Milad AU - Rahimi, Mahmood Reza AD - Department of Chemical Engineering, Masjed-Soleiman Branch, Islamic Azad University, Masjed Soleiman, Iran AD - Department of Chemical Engineering, Yasuj University, Yasuj, Iran Y1 - 2014 PY - 2014 VL - 3 IS - 1 SP - 34 EP - 40 KW - Adsorption KW - Maxwell-Stefan KW - Thermodynamic Factor KW - Vacancy Solution Theory DO - 10.22050/ijogst.2014.5800 N2 - It seems using the Maxwell-Stefan (M-S) diffusion model in combination with the vacancy solution theory (VST) and the single-component adsorption data provides a superior, qualitative, and quantitative prediction of diffusion in zeolites. In the M-S formulation, thermodynamic factor (Г) is an essential parameter which must be estimated by an adsorption isotherm. Researchers usually utilize the simplest form of adsorption isotherms such as Langmuir or improved dual-site Langmuir, which eventually cannot predict the real behavior of mixture diffusion particularly at high concentrations of adsorbates because of ignoring nonideality in the adsorbed phase. An isotherm model with regard to the real behavior of the adsorbed phase, which is based on the vacancy solution theory (VST) and considers adsorbate-adsorbent interactions, is employed. The objective of this study is applying vacancy solution theory to pure component data, calculating thermodynamic factor (Г), and finally evaluating the simulation results by comparison with literature. Vacancy solution theory obviously predicts thermodynamic factor better than simple models such as dual-site Langmuir. UR - https://ijogst.put.ac.ir/article_5800.html L1 - https://ijogst.put.ac.ir/article_5800_19c8b86029963b4dd04759770d84d5b3.pdf ER -