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Comparison of the adsorption of H 2 S by ZnO–TiO 2 and Ni–ZnO–TiO 2 nanoparticles: An adsorption isotherm and thermodynamic study
Author(s) -
Mohammadi Amir,
Saadati Zohreh,
Joohari Shiva
Publication year - 2019
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.13258
Subject(s) - adsorption , nanoparticle , materials science , exothermic reaction , hydrogen sulfide , freundlich equation , volume (thermodynamics) , volumetric flow rate , chemical engineering , chemistry , thermodynamics , nanotechnology , organic chemistry , metallurgy , sulfur , physics , engineering
Nanoparticles were synthesized by the sol–gel method and evaluated for adsorption of hydrogen sulfide using a continuous fixed‐bed column. The effects of the parameters were examined, and the optimum values for nanoparticles were found to be mass of adsorbent 0.2 g, gas volume 5.7 L, flow rate 0.22 L min −1 , and gas pressure 7 Psi at 12 °C. These conditions resulted in a maximum adsorption of H 2 S of 83.24% and 90.43% for ZnO–TiO 2 and Ni–ZnO–TiO 2 nanoparticles, respectively. The equilibrium data were best represented by the Freundlich isotherm. The thermodynamic parameters indicated that the adsorption was spontaneous and exothermic in nature.