Screening of flowsheet modifications for an efficient monoethanolamine (MEA) based post-combustion CO2 capture

Analysis of Process Configurations for CO2 Capture by Precipitating Amino Acid Solvents

“…On the basis of potassium taurate, the DECAB process configuration reduces the reboiler duty but at the expense of increasing the separator energy. Under the integration conditions suggested by Le Moullec, 35 which might not be optimal for the integration of the separator energy into the steam cycle, there is no real gain in the overall energy use of the DECAB configuration as compared to conventional MEA.…”

“…The evaluation of a conventional 30 wt % MEA capture process, based on the same model and assumptions as in the other process configurations, has been added to the table for comparison. The evaluation is based on the equivalent work of each configuration, which has been calculated with the model developed by Le Moullec 35 and includes the energy use of each process configuration, the work of the LVC compressor (when present), and the work to compress the CO 2 to 110 bar. This model focuses on retrofitting a coal fired supercritical power plant of 1200MWe gross with re-superheating of the intermediate pressure steam.…”

Energy and exergy pertaining to solid looping cycles

“…The required heat removed from the steam cycle does not translate directly into an equivalent increase in fuel consumption, since part of this lowtemperature heat is recovered from exhausted streams. Different studies have proposed a number of alternatives to reduce the heat duty on the reboiler and the thermal integration requirements on the power cycle (Abu-Zahra et al, 2007;Ali, 2006;Aroonwilas & Veawab, 2007;Bozzuto, Nsakala, Liljedahl, Palkes, & Marion, 2001;Desideri & Paolucci, 1999;Le Moullec & Kanniche, 2011;Mimura, Simayoshi, Suda, Iijima, & Mituoka, 1997;Singh, Croiset, Douglas, & Douglas, 2003). These studies have been focused on the location of bleedings at the steam turbine (the best option is to extract saturated steam midway through the low-pressure section of the turbine e between 1.8 and 2.8 bar e to fit with the reboiler requirements), the reinjection of condensate from stripper to steam cycle, and the flow split with several stripper staged feeds.…”

“…For existing power plants, the integration of amine scrubbing leads to reductions in power in the original plant of approximately 15%e25%. It is also generally agreed that the efficiency of the power system is reduced from 9%e14% in absolute efficiency percentage terms (Aroonwilas & Veawab, 2007;Abu-Zahra et al, 2007;Goto, Yogo, & Higashii, 2013;Le Moullec & Kanniche, 2011;Metz et al, 2005;, including the compression and purification unit. A significant drawback of amine scrubbing is the low-temperature level of the waste heat, which makes it difficult to use this energy in the steam cycle.…”

Toward Sustainable Solvent-Based Postcombustion CO2 Capture

“…Oyenekan and Rochelle (2007) used such a model for the simulation of alternative multifeed and multipressure configurations for the stripper column. Le Moullec and Kanniche (2011) used miscellaneous flowsheet structures and investigated their effect on the overall process efficiency. A more extensive review of similar methods is presented by Damartzis et al (2014) who proposed a systematic approach for the optimum synthesis of absorption/desorption CO 2 capture flowsheets.…”