Parametric analysis using AMP and MEA as aqueous solvents for CO2 absorption

Koronaki, I.P.; Prentza, L.; Papaefthimiou, V.D.

doi:10.1016/j.applthermaleng.2016.07.140

Cited by 25 publications

(2 citation statements)

References 33 publications

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“…The residence time of the desulfurized flue gas in the CAU was 137.1 s for pathway (i) and 104.1 s for pathway (ii). These residence times in the CAU lie within the reported residence time ranges (10-200 s) for postcombustion CO2 absorption using ethanolamines in packed-beds [97,98]. These residence times for SGS are longer than those in ethanolamines since the reaction kinetics of CO2 and SGS are slower when compared with those of CO2 and ethanolamines.…”

Section: Characteristics Of the Cau In The Two Pathwayssupporting

confidence: 77%

TEA of a Unique Two-Pathways Process for Post-Combustion CO2 Capture

Morsi¹,

Li²,

Ashkanani³

et al. 2022

J Energ Power Technol

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A unique two-Pathways process using aqueous sodium glycinate for CO2 capture from a split flue gas stream emitted from 600 MWe post-combustion coal power plant was developed in Aspen Plus v.10. The split gas flow rate used was 44.75 ton/h and contained 0.0023 mol% SO2 and 13.33 mol% CO2. The process includes a washing unit, a CO2 absorption unit, a reverse osmosis unit, and a solvent regeneration unit or an ultrafiltration unit. The washing unit uses deionized water to completely remove SO2 and the CO2 absorption unit uses SGS to capture at least 90 mol% of the CO2 in the split flue gas stream. Upon CO2 and SGS reactions, the resulting liquid products exhibit phase-separation into CO2-lean phase and CO2-rich phase, allow two distinct pathways. Pathway (i) is to regenerate mostly the CO2-rich phase, collect the released CO2, and compress it for sequestration purposes. Pathway (ii) is to send the liquid stream from the CO2 absorption unit to the ultrafiltration unit to separate the solid nanomaterials. The hydraulics and mass transfer characteristics in the washing and CO2 absorption units were obtained; and techno-economic analysis (TEA) for Pathways (i) and (ii), including Capital Expenditure (CAPEX), Operating Expenditure (OPEX), and Levelized Cost of CO2 Captured (LCOC), were calculated and compared. The simulation results revealed that the CAPEX, OPEX, and LCOC for Pathway (i) were ($12,039,251), (261 $/h), and (54.01 $/ton-CO2 captured), respectively, and those for Pathway (ii) were ($5,908,000), (237.2 $/h), and (39.90 $/ton-CO2 captured), respectively. Moreover, in Pathway (ii), 8.19 ton/h of CO2 were captured to produce 15.62 ton/h NaHCO3 nanomaterials, which were sold to offset the overall process cost. The LCOC values indicate that Pathway (ii) is more cost-effective than Pathway (i) because LCOC values for Pathway (ii) are much lower than those for Pathway (i).

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Section: Characteristics Of the Cau In The Two Pathwayssupporting

confidence: 77%

TEA of a Unique Two-Pathways Process for Post-Combustion CO2 Capture

Morsi¹,

Li²,

Ashkanani³

et al. 2022

J Energ Power Technol

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“…[1] This is clearly highlighted in the large number of investigations that can be found in the open literature. [2][3][4][5][6][7][8][9][10] In these operations, the use of membranes, adsorption, or absorption techniques has been employed, wherein the latter method is the most common and is typically performed physically or chemically. [11,12] Physical absorption of carbon dioxide (CO 2 ) in water depends on its solubility, which is often the limiting factor to its economic viability from a CO 2 sequestration point of view.…”

Section: Introductionmentioning

confidence: 99%

Chemical absorption of CO₂ in alkaline solutions using an intensified reactor

2022

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Capturing carbon dioxide (CO 2 ) emissions from point sources is critical for a sustainable chemical industry. Several techniques have already been developed and the race is ongoing to meet more stringent limitations at lower operating costs. This study presents the capability of a novel, flexible reactor to achieve high absorption rates at very low power consumption. CO 2 absorption in an aqueous sodium hydroxide (NaOH) solution was used as a benchmark. An air-CO 2 stream made of 30% v/v CO 2 was injected co-currently with the aqueous alkaline solution in a tubular reactor equipped with woven mesh mixers. The removal efficiencies were measured along the length of the reactor, which operated at total mean flow velocities ranging between 1-2 m/s and gas phase holdups between 10%-30%. Four different mixer geometries were also tested, and the results were analyzed based on the operating conditions and reactor design configurations. While these studies can be further optimized and potentially applied in carbon capture operations, it was found that more than 96.5% of the CO 2 could be removed using different combinations of mixer geometry and operating conditions. This high removal efficiency was reached within a residence time of 400 ms at a low cost of 23.65 kWh=t CO 2 .

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