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2017-10-15 - Colloque/Abstract - Anglais - 1 page(s)

Laribi Sinda , Dubois Lionel , De Weireld Guy , Thomas Diane , "Simultaneous absorption of SO2 and CO2 from conventional and partial oxy-fuel cement plant flue gases" in 11th International Conference on Distillation and Absorption, Florence, Italie, 2018

  • Codes CREF : Traitement des effluents gazeux (DI3843), Génie chimique (DI2721), Chimie (DI1300)
  • Unités de recherche UMONS : Génie des Procédés chimiques et biochimiques (F505)
  • Instituts UMONS : Institut de Recherche en Energétique (Energie)

Abstract(s) :

(Anglais) Currently, one of the most important challenges for the industrial sector is to reduce its emissions of carbon dioxide in the atmosphere (30% of the annual CO2 industrial emissions come from the cement industry). In the current communication, a solution on which we are focusing in order to limit these emissions is the Carbon Capture and Storage or Utilisation (CCS/U) applied to the cement industry. The two CO2 capture technologies under development in this industrial sector are the post-combustion capture and the full oxy-fuel combustion capture requiring important amounts of energy consumptions. An innovative “hybrid” capture technique likely to lower these energy costs is called post-combustion capture applied to O2-enriched air combustion. This technology allowing a CO2 concentrated flue gas to treat is considered in this work, studying more precisely the SO2 absorption which can accompany the absorption-regeneration process, regarding two possible configurations found in literature: a single-column configuration for simultaneous CO2/SO2 capture (Puxty et al., 2014) and a two-column configuration for separate absorptions (Stéphenne, 2014). The present communication is based on the evaluation of the effect of the presence of SO2 in the gas to treat, on the CO2 absorption performances for several types of amine solvents (simple solvents and blended solvents) in a range of yCO2,in between 20% and 60%, corresponding to typical flue gases from a conventional combustion and an O2-enriched air combustion. Tests at lab scale were performed with CO2 non-loaded solutions and CO2 loaded solutions: amine based solvents absorption performances (MEA, MMEA, MDEA, AMP and PZ) were compared in order to identify the best ones for SO2 and CO2 co- or separate captures relative to each absorption-regeneration configuration.