Articolele autorului Ion Untea
Link la profilul stiintific al lui Ion Untea

The influence of admixture of Al2O3 on the ZnO-TiO2 sorbent of sulphurization-regeneration trough oxidation in air at high temperature

High Temperature Gas Desulfurization (HTGD) is the main process for hydrogen sulphide removal from gases at high temperature. Higher efficiency and lower cost are achived by using zinc oxide based sorbents as they can effectively reduce the H2S content in gases to ppm levels and can be regenerated for multicycle operation. Zinc titanates sorbents, a mixed-metal oxides prepared by combining ZnO and TiO2 at high temperature, is currently one of the

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Thermodynamic study of phenol sorption from aqueous solutions on styrene-divinylbenzene copolymers

In this study, comparative experimental data regarding the equilibrium of phenol retention in water solutions through adsorption on synthesized (S-DVB) and commercial (Amberlite XAD-1) macroporous styrene – divinylbenzene copolymers, with different morphological structures are presented. The phenol adsorption capacity of water solution, expressed under the form of isotherms of adsorption is found to be in a positive correlation with the structural

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Unconventional ion exchange resins and their retention properties of Hg2+ ions

Synthesis of two unconventional ion exchange resins and their behaviour on the mercury sorption experiments were investigated. The ion exchange resins were obtained by the quaternization reaction of 4-vinylpyridine:divinylbenzene copolymer, gel-type, by two ways namely, the nucleophilic substitution of the pyridine matrix with 2-chloroacetamide and the nucleophilic addition of protonated copolymer to acrylamide. Comparative sorptions of Hg2+ ions

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