Adsorption of CO 2 in presence of NO x and SO x on activated carbon textile for CO 2 capture in post-combustion conditio
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Adsorption of CO2 in presence of NOx and SOx on activated carbon textile for CO2 capture in post‑combustion conditions S. Boumghar1 · S. Bedel1 · L. Sigot1 · C. Vallières1 Received: 9 July 2019 / Revised: 19 December 2019 / Accepted: 25 January 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The influence of NOx and SO2 contaminants on CO2 capture by adsorption was investigated using a carbon fiber textile as an adsorbent. The study was made in a dynamic system, studying the contaminant alone and in binary or ternary mixtures. The results at short times showed that the C O2 capacity and kinetics were not impacted by the presence of N Ox in the entrance gas whereas the NOx capacity was slightly impacted by the presence of CO2. In the presence of SO2, the CO2 capacity loss reached 10%. Moreover, with N Ox and S O2 accumulation at the surface of the textile, the loss of C O2 capacity can reach 25% and SO2 adsorption is favored to the detriment of NO. For CO2 capture processes by adsorption de-SOx pretreatment is recommended. Keywords CO2 capture · Activated carbon textile · Nox and SOx impacts · Co-adsorption · Post-combustion
1 Introduction In the context of capturing carbon dioxide (CO2) from postcombustion fumes, various capture processes have already been the subject of numerous articles and reviews (Sreenivasulu et al. 2015; Li et al. 2013; D’Alessandro et al. 2010). Among the most studied processes, solid adsorption has certain advantages, such as reduced energy consumption. A large portion of the published studies are carried out on synthetic mixtures C O2/nitrogen (N2) or C O2/air (Samanta et al. 2012; Hedin et al. 2013; Yu et al. 2012; Sayari et al. 2011; Choi et al. 2009). However, real fumes contain many compounds that can interact with the adsorbent and disrupt the adsorption of CO2. In particular, two types of compound present in post-combustion fumes require further study: nitrogen oxides ( NOx) and sulfur oxides ( SOx) (Choi et al. 2009; Thiruvenkatachari et al. 2015). Among the materials reported in the literature for postcombustion CO 2 capture, activated carbons have been widely studied (Sjostrom et al. 2011; Sjostrom and Krutka 2010; Wang et al. 2014). Indeed, activated carbons have * C. Vallières cecile.vallieres@univ‑lorraine.fr 1
Laboratoire Réactions Et Génie Des Procédés, CNRS, Université de Lorraine, 1 rue Grandville, 54001 Nancy, France
very interesting characteristics, including fast adsorption and desorption kinetics, low energy consumption in terms of regeneration and low cost. Despite a somewhat limited tolerance to contaminants, activated carbons generally remain more advantageous than other physical adsorbents for postcombustion CO2 capture. In particular, activated carbon fiber textiles show advantageous properties for adsorption implementation such as low pressure drop, high accessible surface area and high thermal conductivity that facilitates heat transfer. Several studies about air treatment have already
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