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Etude du captage post-combustion du co2 grâce à un procédé vsa (vacuum swing adsorption) avec de nouveaux adsorbants

Abstract : To deal with the CO2 emissions increase in the atmosphere due to electricity production, CO2 post-combustion capture by VSA process is a promising solution. The adsorbents used in this study are impregnated TEPA on SiO2, lanthanide oxides and the MOF (Metal Organic Frameworks) SIM-1. For each adsorbent, a study of breakthrough and regeneration was carried out from a feed composed of 15%vol CO2 and N2. From these experiments, the cyclic operating conditions of VSA have been established (short duration phases, no purge). Cyclic performances are compared to that of the absorption process with monoethenolamine. The desorbate purity varies from 89.2% to 97.2%vol according to adsorbent and operating conditions. It is less than that obtained with absorption process (99%vol) but it is correct for transport and storage. The recovery varies from 87.2% to 94.2% (absorption: 98%). The energy consumption is less than that the process with the MEA (from 1.53 to 3.45 MJ.kgCO2 1 for our process and 3.7 MJ.kgCO2 1 for absorption). . Finally, the productivity is of the same order of magnitude as that of other VSA processes from literature. With the numerical model, a local study of the adsorber was carried out. Afterwards, through a parametric study, cycle optimal conditions were determined. The cycle results highlighted comparable performances with the other VSA processes from literature. Moreover, our process needs less energy than absorption process but the desorbate purity and CO2 recovery remain lower.
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François Guilhamassé. Etude du captage post-combustion du co2 grâce à un procédé vsa (vacuum swing adsorption) avec de nouveaux adsorbants. Sciences agricoles. Conservatoire national des arts et metiers - CNAM, 2013. Français. ⟨NNT : 2013CNAM0893⟩. ⟨tel-00978530⟩

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