Technical Evaluation of Selexol-Based CO2 Capture Process for a Cement Plant

Review: CO2 capturing methods of the last two decades

“…(Ghasem 2020) The process can be used in the cement industry, for example. In the research work by Tsunatu et al (2015), the Selexol-based CO 2 capturing method was technically evaluated. The simulation results showed that 97% of the carbon dioxide can be captured.…”

Decentralized Production of Fischer–Tropsch Biocrude via Coprocessing of Woody Biomass and Wet Organic Waste in Entrained Flow Gasification: Techno-Economic Analysis

“…Here, we have considered a linear dependence for the selectivity of CO 2 in Selexol, , given by χ s,CO 2 = 5.26 × 10 –7 T sel to 1.064 × 10 –8 T sel based on correlations from experimental results. The temperature of the Selexol at the absorber outlet is calculated considering energy conservation for the total flow of Selexol in the absorber, giving where q sel,CO 2 is the heat release per unit mole of CO 2 dissolved in the Selexol, assumed to be constant and equal to 221 kJ/mol for CO 2 mass fraction in the range 0.37–0.383 and Q̇ gs ABS = A gs ABS U gs ABS LMTD gs ABS is the total convective heat transfer from the syngas to the Selexol. Here, A gs ABS is the total heat transfer area from syngas to Selexol, which is calculated in terms of the volume fraction of Selexol in the absorber ϕ l ABS and the Selexol droplet diameter d sel from A gs ABS = V sel ABS ϕ l ABS / d sel .…”

“…(2. 25) where q sel,CO 2 is the heat release per unit mole of CO 2 dissolved in the Selexol, assumed to be constant and equal to 221 kJ/mol for CO 2 mass fraction in the range 0.37−0.383 28 29 Using the flow rate of Selexol from eq 2.28, the capture ratio for H 2 and CO can be obtained from…”

“…21) where and are the capture ratios for H2 and CO. Based on the definition of , the total volumetric flow rate of CO2 capture in the Selexol system is calculated fromDimensioning of the absorption column is based the total input flow rate of syngas and solvent, which can be calculated from in terms of the concentration of the syngas from the EFG reactor Selexol relative the flow rate required to reach equilibrium. Here, we have considered a linear dependence for the selectivity of CO2 in Selexol[26,27] given by Selexol at the absorber outlet is calculated considering energy conservation for the total flow of Selexol in the absorber, giving is the heat release per unit mole of CO2 dissolved in the Selexol, assumed to be constant and equal to 221 kJ/mole for CO2 mass fraction in the range of 0.37-0.383[28] and is the total convective heat transfer from the syngas to the Selexol.Here, is the total heat transfer area from syngas to Selexol which is calculated in terms of the volume faction of Selexol in the absorber and the Selexol droplet diameter from / . The heat transfer coefficient between the gas and the solvent is Using the flow rate of Selexol from Eq.…”

Assessment of a membrane contactor process for pre-combustion CO2 capture by modelling and integrated process simulation

“…For CO2 absorption, physical solvents are favoured in case of high pressure and low temperatures and when large gas volumes are available at high pressures [5,6]. The commercially available physical absorbents include polypropylene carbonate [7], Methanol (Rectisol) [8,9], N-methyl-2-pyrollidone (Purisol), Dimethylether polyethylene glycol (Selexol) [10,11], and water. The physical absorbents exhibit stripping of acid gas by pressure swing, which reduces the energy penalty as in case of chemical absorbents, where the regeneration of absorbents demands high energy.…”