Phase-Change Solvents and Processes for Postcombustion CO<sub>2</sub> Capture: A Detailed Review

Παπαδόπουλος, Αθανάσιος Ι.; Tzirakis, Fragkiskos; Tsivintzelis, Ioannis; Seferlis, Panos

doi:10.1021/acs.iecr.8b06279

Cited by 66 publications

(36 citation statements)

References 80 publications

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“…There is another class of amine-based solvents which is called phase-change solvents including amine-alcohol system and amine-water system. Upon CO 2 absorption or increasing the temperature after CO 2 absorption, the solvent divides into two phases: CO 2 -rich and CO 2 -lean phases (Zhuang et al, 2016;Papadopoulos et al, 2019). In contrast to traditional solvents, only the CO 2 -rich phase is sent for regeneration; therefore, the energy demand and the size of the regenerator can be dramatically reduced in comparison to non-phase-change solvents.…”

Section: Gas Turbinementioning

confidence: 99%

Carbon Capture From Flue Gas and the Atmosphere: A Perspective

2020

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Climate change has become a worldwide concern with the rapid rise of the atmospheric Co2 concentration. To mitigate Co2 emissions, the research and development efforts in Co2 capture and separation both from the stationary sources with high Co2 concentrations (e.g., coal-fired power plant flue gas) and directly from the atmosphere have grown significantly. Much progress has been achieved, especially within the last twenty years. In this perspective, we first briefly review the current status of carbon capture technologies including absorption, adsorption, membrane, biological capture, and cryogenic separation, and compare their advantages and disadvantages. Then, we focus mainly on the recent advances in the absorption, adsorption, and membrane technologies. Even though numerous optimizations in materials and processes have been pursued, implementing a single separation process is still quite energy-intensive or costly. To address the challenges, we provide our perspectives on future directions of Co2 capture research and development, that is, the combination of flue gas recycling and hybrid capture system, and one-step integrated Co2 capture and conversion system, as they have the potential to overcome the technical bottlenecks of single capture technologies, offering significant improvement in energy efficiency and cost-effectiveness.

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Section: Gas Turbinementioning

confidence: 99%

Carbon Capture From Flue Gas and the Atmosphere: A Perspective

2020

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“…MDEA/PZ. Among the aqueous alkanolamines, some of them present the advantage to produce a phase split of the rich solvent stream (Papadopoulos et al 2019). The phase poor in CO 2 is recycled directly to the absorption column, decreasing the flow rate of rich CO 2 phase fed to the distillation column.…”

Section: Alternative Aqueous Alkanolamines To Meamentioning

confidence: 99%

Investigating best available technique for CO2 chemical absorption: solvent selection based on empirical surrogate model and exergy loss

Popescu

González

Llorens

et al. 2021

Clean Techn Environ Policy

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The carbon dioxide concentration in the atmosphere has reached extremely high levels, generating environmental concerns. Unfortunately, despite the climate change, CO2 is not included nowadays as a key environmental issue in Best Available Technique (BAT) reference documents (BREF). Industrially, the widespread industrial technology to capture CO2 is the chemical absorption using aqueous monoethanolamine (MEA) at 30%wt, which is the basis of comparison for novel alternative techniques in the literature and seems a suitable candidate to be proposed as Best Available Technique. Nevertheless, there is an intense research to find alternative solvents that decrease the energy consumption for carbon capture and many solvents are claimed in the literature to outperform MEA. A novel empirical surrogate model and exergy balances are used to confirm that MEA is still the best candidate to be proposed as Best Available Technique. The surrogate model proposed in this study properly regresses the CO2 gas liquid equilibrium data. The regressed parameters of the model are tabulated in this study for many aqueous alkanolamines and their mixtures, being the basis for computationally inexpensive chemical absorption column design. The surrogate model parameter considering the temperature is related with the chemical absorption energy and the consumed energy for solvent recovery. The obtained results show that none of the considered alkanolamine outperforms MEA in all the considered aspects, i.e. energy and solvent flowrate. MEA minimum flowrate is 15.62 mol solvent/mol gas and its heat of absorption regression parameter is − 27,745 J/mol. The proposed mathematical method is useful as a fast assessment for other novel alternatives that will be proposed in the future, providing energetically more efficient and cleaner technologies for CO2 capture. Graphic abstract

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“…13 C NMR spectroscopy revealed that the precipitate consisted formed through intramolecular or intermolecular cooperative activation of their primary and tertiary amino groups. 29 IPDA also formed CA1 by interaction of its amino groups with CO2.…”

Section: According To the Proposed Carbamate Mechanism Of Meamentioning

confidence: 99%

“…1A-a). 29 Although these are promising sorbents for CO2 capture and desorption, further improvements in the rate of CO2 absorption and more efficient 4 absorption at low CO2 concentrations are required. Liquid-liquid phase-separation of amine-H2O mixtures with lower critical solution temperatures have recently been developed to reduce the costs of regenerating the sorbent (Fig.…”

Section: Introductionmentioning

confidence: 99%

Liquid amine–solid carbamic acid phase-separation system for direct capture of CO2 from air

Kikkawa

Amamoto

Fujiki

et al. 2021

Preprint

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The phase separation between a liquid amine and the solid carbamic acid exhibited >99% CO2 removal efficiency under a large-scale gas stream of 400 ppm CO2. Isophorone diamine [IPDA; 3-(aminomethyl)-3,5,5-trimethylcyclohexylamine] reacted with CO2 in the CO2/IPDA molar ratio of ≥ 1 even in H2O as a solvent. The captured CO2 was completely desorbed at 333 K because the disolved carbamate ion releases CO2 at low temperature. The reusability of IPDA under CO2 adsorption-and-desorption cycles without degradation, the >95% efficinecy kept for 100 hours under direct air capture condition, and high CO2 capture rate (214 mmol/h for 1 mol amine) suggest that the phase separation system using IPDA is robust and durable for practical use.

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Phase-Change Solvents and Processes for Postcombustion CO₂ Capture: A Detailed Review

Cited by 66 publications

References 80 publications

Carbon Capture From Flue Gas and the Atmosphere: A Perspective

Carbon Capture From Flue Gas and the Atmosphere: A Perspective

Investigating best available technique for CO2 chemical absorption: solvent selection based on empirical surrogate model and exergy loss

Liquid amine–solid carbamic acid phase-separation system for direct capture of CO2 from air

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Phase-Change Solvents and Processes for Postcombustion CO2 Capture: A Detailed Review

Cited by 66 publications

References 80 publications

Carbon Capture From Flue Gas and the Atmosphere: A Perspective

Carbon Capture From Flue Gas and the Atmosphere: A Perspective

Investigating best available technique for CO2 chemical absorption: solvent selection based on empirical surrogate model and exergy loss

Liquid amine–solid carbamic acid phase-separation system for direct capture of CO2 from air

Contact Info

Product

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Phase-Change Solvents and Processes for Postcombustion CO₂ Capture: A Detailed Review