Phase change amino acid salt separates into CO2-rich and CO2-lean phases upon interacting with CO2

Wang, Xianfeng; Akhmedov, Novruz G.; Hopkinson, David; Hoffman, James S.; Duan, Yuhua; Egbebi, Adefemi; Resnik, Kevin; Li, Bingyun

doi:10.1016/j.apenergy.2015.09.094

Cited by 85 publications

(41 citation statements)

References 39 publications

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“…The steam turbine is divided into different components (11)(12)(13)(14)(15)(16)(17)(18)(19). The feed-water heaters (1-8), the deaerator (5), the condenser (23) and the pumps (21,22,26) are not divided, because the calculation accuracy satisfies the requirements. The parabolic-trough solar-collector subsystem consists of collectors (25) and a pump (26).…”

Section: Thermo-economic Structural Theorymentioning

confidence: 99%

Analysis of Integration of MEA-Based CO2 Capture and Solar Energy System for Coal-Based Power Plants Based on Thermo-Economic Structural Theory

Zhai

Liu

et al. 2018

Energies

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Installing CO 2 capture plants in coal-fired power stations will reduce greenhouse gas emissions and help mitigate climate change. However, the deployment of this technology faces many obstacles-in particular, high energy consumption. Aiming to address this challenge, we investigated the integration of a solar energy system in a 1000 MW coal-fired power plant equipped with monoethanolamine (MEA)-based CO 2 capture (termed PG-CC) by comparing the thermo-economic performance of two integrated systems with that of PG-CC. In the first system, solar-aided coal-fired power generation equipped with MEA-based CO 2 capture (SA-PG-CC), solar thermal was used to heat the high-pressure feed water in the power plant, while the reboiler duty of the capture plant's stripper was provided by extracted low-pressure steam from the power plant. The second system integrated the power plant with solar-aided MEA-based CO 2 capture (SA-CC-PG), using solar thermal to heat the stripper's reboiler. Both systems were simulated in EBSILON Professional and Aspen Plus and analysed using thermo-economics theory. We then evaluated each system's thermodynamic and economic performance in terms of power generation and CO 2 capture. Compared with PG-CC, the thermo-economic cost of electricity increased by 12.71% in SA-PG-CC and decreased by 9.77% in SA-CC-PG. The unit thermo-economic cost of CO 2 was similar in both the PG-CC and SA-PG-CC systems, but significantly greater in SA-CC-PG. Overall, SA-PG-CC produced less power but used energy more effectively than SA-CC-PG. From a thermo-economic point of view, SA-PG-CC is therefore a better choice than SA-CC-PG.

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Section: Thermo-economic Structural Theorymentioning

confidence: 99%

Analysis of Integration of MEA-Based CO2 Capture and Solar Energy System for Coal-Based Power Plants Based on Thermo-Economic Structural Theory

Zhai

Liu

et al. 2018

Energies

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“…As showed in the 1H-NMR spectrums of Fig 12, carbamate appeared in both the liquid phase and solid phase, which was consistent with the result of 13C-NMR spectra. Due to the pH change of the solution after capturing CO2, the signals of H atoms in -OOC-CH2-NH2/-OOC-CH2-NH3+ shifted [31]. In order to get the proportion of each species, liquid phase after complete phase separation had been heated to release CO2, rotary evaporated and vacuum drying, successively.…”

Section: Phase Change In the Co2 Bubbling Experimentsmentioning

confidence: 99%

“…Amino acid salt solvents turned into a CO2-lean phase and a CO2-rich phase, which contained 90% CO2 of the total capture amount. The dominant component of the CO2-rich phase was bicarbonate [31]. Since the alkali carbonate/bicarbonate couldn't wholly decomposite and regenerate at the desorption temperature, the AAs /H2O system didn't possess the multiple regeneration ability.…”

Section: Introductionmentioning

confidence: 99%

Phase Change and Regeneration Behaviors of Amino Acid Ionic Liquids Absorbents

Chen¹,

Guo²,

Ouyang³

et al. 2018

Preprint

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As novel materials for carbon capture, phase change solvents can separate into two immiscible phases during the CO2 capturing procedure under a certain temperature. The solvent systems can significantly decrease the energy consumption since the solvents can be regenerated by only heating the rich-CO2 phase. In this work, amino acid ionic liquids (AAILs) were synthesized using quaternary ammonium salts and amino acids as raw materials, and the aqueous solutions were prepared as novel liquid-solid phase change solvents. The results showed that the solvents had excellent CO2 absorption capacity, and the AAILs functionalized by glycine and tryptophan exhibited significant phase change properties. The mechanism of phase-change of the solvent were mainly due to the lower solubility of the product after reaction between AAILs and CO2. The solvent with tryptophan as anion could be regenerated by only heating the CO2-riched solid phase, which might significantly decrease energy consumption of regeneration. And the absorbent could be reused with the regenerated absorption ratio up to 79%. The solvent system has great potential in industrial application due to the easy operation process and efficient recycling ability.

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“…The main advantage of amino acid-based systems over conventional alkanolamines relies on high stability to oxidative degradation, high chemical reactivity with CO 2 , low vapour pressures (compatible with temperature of flue gases), and high surface tension (fundamental on the design of membranes). Various studies exist when an inorganic cation is used [6][7][8][9][10][11][12][13][14][15][16][17][18]. Here a selection will be emphasized to establish the structure of amino acid/CO 2 absorption-desorption properties relationship (Figure 4, Table 1).…”

Section: Amino Acidsmentioning

confidence: 99%

“…The carbamic acid reaction profile and steric hindrance lead to low energy requirements for CO 2 desorption (313 K). An interesting work was carried out by Wang et al [17], where, from a diverse set of amino acid sodium salts (aqueous solutions) was possible to observe with Alanine, a phase-split between a CO 2 -rich and a CO 2 -lean phase. The CO 2 -rich phase was composed of carbamate and hydrogencarbonate.…”

Section: Amino Acidsmentioning

confidence: 99%

Bio-inspired Systems for Carbon Dioxide Capture, Sequestration and Utilization

Carrera¹,

Branco²,

daPonte³

2017

Recent Advances in Carbon Capture and Storage

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This chapter reviews the study and development of biological, enzymatic and biomolecular systems for carbon dioxide capture and further sequestration or even utilization. Regardless of the interest on the use of the captured CO 2 as C1 synthon on the manufacture of added-value compounds, there is a tremendous unbalance between the requirements of the contemporary society (leading to a massive production of carbon dioxide) and the framework of commercialization of the products from CO 2 utilization. In this context, viable options are storage as a solid in the form of calcium or magnesium carbonate and conversion into other energetic frameworks. In addition, it is important to highlight that the conventional energy resources are progressively being replaced by renewable resources. While the change in energetic paradigm is not accomplished, systems that capture and convert carbon dioxide are highly sought. To this end, bio-inspired systems will be presented, starting from the use of compounds from the chiral pool, such as amino acids, saccharides and related bio-polymers, involved in the physical and chemical capture, sequestration and/or utilization of CO 2. Additionally, enzymatic systems are presented in the context of sequestration of CO 2 in the form of solid carbonates or even utilization of this C1 synthon in the preparation of fuels and commodity chemicals. Carbonic anhydrase is by far the most studied enzyme, as it catalyses the inter-conversion between CO 2 and hydrogencarbonate in an effective mode. The biological option comprises the utilization of methanogens, acetogens and other organisms leading to the formation of added-value compounds. Most of the described systems are based on microbial electro-synthesis model and microbial carboncapture cell prototypes.

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Phase change amino acid salt separates into CO2-rich and CO2-lean phases upon interacting with CO2

Cited by 85 publications

References 39 publications

Analysis of Integration of MEA-Based CO2 Capture and Solar Energy System for Coal-Based Power Plants Based on Thermo-Economic Structural Theory

Analysis of Integration of MEA-Based CO2 Capture and Solar Energy System for Coal-Based Power Plants Based on Thermo-Economic Structural Theory

Phase Change and Regeneration Behaviors of Amino Acid Ionic Liquids Absorbents

Bio-inspired Systems for Carbon Dioxide Capture, Sequestration and Utilization

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