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2016-10-06 - Colloque/Présentation - poster - Anglais - 1 page(s)

Chauvy Remi , Meunier Nicolas, Dubois Lionel , Thomas Diane , De Weireld Guy , "CO2 utilization from cement plant flue gas: Methodological selection of CO2 conversion pathways , flash presentation and poster" in Journée des Jeunes Chercheurs - EDT GEPROC, Louvain-la-Neuve, Belgique, 2016

  • Codes CREF : Traitement des effluents gazeux (DI3843), Technologie de l'environnement, contrôle de la pollution (DI3841), Thermodynamique chimique (DI132C), Génie chimique (DI2721), Chimie (DI1300)
  • Unités de recherche UMONS : Génie des Procédés chimiques et biochimiques (F505), Thermodynamique, Physique mathématique (F506)
  • Instituts UMONS : Institut de Recherche en Energétique (Energie)

Abstract(s) :

(Anglais) Carbon Capture Storage (CCS) and Utilization (CCU) are nowadays a well-studied and promising field in order to reduce CO2 emissions, main driver of global warming. A large number of processes and chemical reactions can use CO2 as an alternative carbon feedstock, which can arise from a wide range of sources including industrial flue gas, such as from power, cement or ammonia plants. In particular, the cement sector represents approximately 5 to 7% of anthropogenic global CO2 emissions [1]. Therefore, an important task for this sector is to reduce its emissions via different levers, such as modern dry-process technology and carbon capture storage or reuse. Hence, capture and conversion of CO2 from cement plants is a key issue to this sector. As a multitude of processes and chemical reactions exists to convert CO2 into valuable compounds, at different levels of maturity and performances, a two-step method is proposed to reduce this panel using selection criteria developed for this purpose. Therefore, the technological maturity of the conversion route, based on the so-called Technology Readiness Levels (TRL) and timeframe to deployment of the technology, is assessed through a review of CO2 usage activities around the world (Figure 1). In addition, a criterion evaluating the route potential to convert large volumes is relevant as a best available technology (BAT) cement plant emits around 2500 tons of CO2 a day [2]. Following this, the second step involves further criteria, mainly based on economic and environmental aspects as well as market considerations, to assess the routes with the help of a weighting matrix specially developed within this study. This second assessment helps to identify the CO2 conversion routes which are the most suitable to be implemented in the cement sector within a mid-term time period (Figure 2). Several routes which mostly fulfill these above criteria are thus selected for in-depth analysis, such as the CO2-based production of methanol via catalytic hydrogenation, formic acid via electrochemical reduction or sodium carbonates through mineral carbonation. Focusing on suitable CO2 conversion pathways through various deepened criteria for the cement sector will help final decision makers to fit the roadmap for the cement sector to mitigate their contribution on global warming. References [1] Benhelal E., Zahedi G., Shamsaei E., Bahadori A., Global strategies and potentials to curb CO2 emissions in cement industry, Journal of Cleaner Production, 51 (2013), 142–161. [2] ECRA, ECRA Project – Report about CO2 reuse from cement production, Methanol and Methane synthesis, by Ronan Corcoran, Technical Report (2013).