Estudo da dessulfurização de biogás utilizando adsorventes hidróxidos duplos lamelares (HDL'S), carvão ativado e polímero macronet MN200
Energy consumption listed in technological development has resulted in uncertainties regarding energy generation. In this scenario, the production of energy from biogas generated by anaerobic digestion is an excellent alternative. Biogas is a gaseous mixture containing metha...
| Autor principal: | Ziglioli, Eduardo |
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| Formato: | Dissertação |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2021
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/25467 |
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| Resumo: |
Energy consumption listed in technological development has resulted in uncertainties regarding energy generation. In this scenario, the production of energy from biogas generated by anaerobic digestion is an excellent alternative. Biogas is a gaseous mixture containing methane (CH4), carbon dioxide (CO2), small fractions of hydrogen sulfide (H2S), and other elements. For use in motor generators, it is recommended to purify it in order to avoid damage to the generator, corrosion in the installations and the emission of sulfur oxides (SOx) into the atmosphere. Adsorption is a physical or chemical process that can be used for the removal of pollutants in small concentrations. The study had the evaluation of some adsorbents in the process of desulfurization of biogas (removal of H2S), for use in motor generators. The adsorbents studied were MacronetTM MN200 (Purolite), Activated Carbon, and nine different Lamelar Double Hydroxides synthesized in UTFPR-MD. The studies were carried out on a bench with synthetic biogas in 20 and 100 mL vials, later in a biodigester, and a small-scale adsorption column with flow control was coupled. The initial bench tests were to evaluate selectivity of H2S/CH4 and CO2/CH4, removal capacity and desorption capacity, with these results it was decided to select only three adsorbents to continue the studies: MacronetTM MN200 (Purolite), Activated Carbon and HDL Fe3O4@HDL Mg/Al 4:1 CTAB that had the following results on the bench for removal capacity 0.0463; 186; 246 mgH2S/gads. The biodigester used is in a farm and has an average production of 60m³/hour of biogas, where a fixed bed (D=10cm, H=40 cm) was installed coupled to the biodigester and the flow controlled by rotameter. The results of specific adsorption for the selected adsorbentswere 1.91; 71.5 and 459.42 mg (H2S).g-1(ads) respectively. The results of desorption showed that the adsorbent MacronetTM MN200 (Purolite) is desorbed by heating at 130 0C, the adsorbent Activated Carbon at the same temperature lost efficiency every cycle, since the adsorbent Fe3O4@HDL Mg/Al 4:1 CTAB was practically not regenerated by heating at 130 oC. |
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