Potential of CO2 capture from flue gases by physicochemical and biological methods: a comparative study
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Matito-Martos, Ismael; Sepúlveda, Claudia; Gómez, Cintia; Acién Fernández, Francisco Gabriel; Perez-Carbajo, Julio; [et al.]Fecha
2020-09-01Resumen
The industrial viability of two emerging technologies for CO2 capture from flue gases, i.e.,
adsorption in porous commercial zeolites and biomass production by microalgae, is
compared. Our study is organized in two steps: first, the best system is selected (either
zeolite type or microalgae strain). Second, their performance is quantified and their
advantages at real conditions discussed. For the physicochemical process, we find that
commercial zeolite MFI is the best choice for CO2 capture from a typical industrial flue gas
emission. Numerical dual PSA cycle simulations at ambient conditions yield 8 kg m-3
bed h-1 and an energy consumption of 0.987 MJ per kg of captured CO2. As regards the
biological process, evaluation of several microalgae strains in continuous mode using low
cost resources (waste water, fertilizers, flue gases), results in Scenedesmus almeriensis as
the most promising strain. The maximal capacity of CO2 capture at laboratory conditions
was 0.1 kg m-3 h -...