Adsorption of hydrogen sulfide at low temperatures using an industrial molecular sieve: an experimental and theoretical studyAdsorption of hydrogen sulfide at low temperatures using an industrial molecular sieve: an experimental and theoretical study Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2022-11-232021enThe authors gratefully acknowledge that this research has been cofinanced by the European Union and Greek national funds through the operational program Competitiveness, Entrepreneurship and Innovation, under the call Research-Create-Innovate (Project code: T1EDK–00782).In the work presented herein, a joint experimental and theoretical approach has been carried out to obtain an insight into the desulfurization performance of an industrial molecular sieve (IMS), resembling a zeolitic structure with a morphology of cubic crystallites and a high surface area of 590 m2 g–1, with a view to removing H2S from biogas. The impact of temperature, H2S inlet concentration, gas matrix, and regeneration cycles on the desulfurization performance of the IMS was thoroughly probed. The adsorption equilibrium, sorption kinetics, and thermodynamics were also examined. Experimental results showed that the relationship between H2S uptake and temperature increase was inversely proportional. Higher H2S initial concentrations led to lower breakpoints. The presence of CO2 negatively affected the desulfurization performance. The IMS was fully regenerated after 15 adsorption/desorption cycles. Theoretical studies revealed that the Langmuir isotherm better described the sorption behavior, pore diffusion was the controlling step of the process (Bangham model), and that the activation energy was 42.7 kJ mol–1 (physisorption). Finally, the thermodynamic studies confirmed that physisorption predominated.http://creativecommons.org/licenses/by-nc-nd/4.0/ACS Omega62314774–14787Georgiadis_et_al_ACS Omega_6(23)_2021.pdfChania [Greece]Library of TUC2022-11-23application/pdf6.3 MBfree Georgiadis Amvrosios G. Charisiou Nikolaos D. Gaber Safa Polychronopoulou Kyriaki Gentekakis Ioannis Γεντεκακης Ιωαννης Goula Maria A. American Chemical Society Adsorption Desulfurization Diffusion Equilibrium Zeolites