Synthesis and evaluation as CO2 chemisorbent of the Li5(Al1−Fe )O4 solid solution materials: Effect of oxygen addition

Olavarría, Paulina; Vera, Elizabeth; Lima, Enrique; Pfeiffer, Heriberto

doi:10.1016/j.jechem.2017.08.002

Cited by 14 publications

(14 citation statements)

References 43 publications

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“…The common finding is that as diffusion of O 2from the bulk sorbent to the surface is the main kinetic limiting factor for the formation of a carbonate phase, the addition of O2 to the gas phase improves the availability of O2 for carbonation, increasing the absorption rate and overall capacity. This effect was observed for a range of materials including Li6WO6 nanowires [464], Li5FeO4 [473] and Li5AlO4 [582], [583], with activation energies for O 2diffusion derived from CO2 absorption measurements again in line with experimental values of 1 -2 eV.…”

Section: Connection Between Ionic Conduction and Co2 Absorption In LIsupporting

confidence: 71%

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CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

Dunstan¹,

Donat²,

Bork³

et al. 2021

Preprint

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Carbon dioxide capture and mitigation forms a key part of the technological response to combat climate change and reduce CO2 emissions. Solid materials capable of reversibly absorbing CO2 have been the focus of intense research for the past two decades, promising stability and low energy costs to implement and operate compared to the more widely used liquid amines. In this Review, we explore the fundamental aspects underpinning solid CO2 sorbents based on alkali and alkaline earth metal oxides operating at mid- to high temperature: how their structure, chemical composition and morphology impact their performance and long-term use. Various optimization strategies are outlined to improve upon the most promising materials, and we combine recent advances across disparate scientific disciplines including materials discovery, synthesis, and in situ characterization to present a coherent understanding of the mechanisms of CO2 absorption both at surfaces and within solid materials.

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Section: Connection Between Ionic Conduction and Co2 Absorption In LIsupporting

confidence: 71%

“…The net effect of this is an improvement of the oxide ionic conductivity and improvement of the overall rate of CO2 absorption. This has been observed in practice for Fe-doped Li4SiO4 [584], Fe-doped Li2ZrO3 [585], [586], Fe-doped Li5AlO4 [583] and Fe-doped NaCoO2 [587].…”

Section: Connection Between Ionic Conduction and Co2 Absorption In LIsupporting

confidence: 61%

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

Dunstan¹,

Donat²,

Bork³

et al. 2021

Preprint

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“…The development of low-energy-consumption and low-cost H 2 /CO 2 separation technology is the key to reducing the pre–combustion CO 2 capture cost for IGCC. In this area, the sorption enhanced WGS process is widely identified as a promising pre–combustion CO 2 capture technology. − Zhu et al evaluated the IGCC with CO 2 capture by elevated temperature pressure swing adsorption (ET–PSA) and demonstrated that the ET–PSA has the potential to be applied in a real IGCC power plant and some chemical industries (e.g., synthesis ammonia) to capture CO 2 with relatively lower energy consumption than the conventional CO 2 removal technologies. However, good CO 2 adsorption materials that capture CO 2 in the temperature range of 200–400 °C are crucial to ensure the implementation of this technology.…”

Section: Introductionmentioning

confidence: 99%

High and Efficient CO₂ Capture in Molten Nitrate-Modified Mg–Al–Palmitate Layered Double Oxides at High Pressures and Elucidation of Carbonation Mechanisms by in Situ DRIFT Spectroscopy Analysis

Lara-García¹,

Gao

Gómez-Cortés³

et al. 2019

Ind. Eng. Chem. Res.

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We report a systematic investigation on the high-pressure CO 2 capture performance of molten salts-promoted Mg−Al−palmitate layered double oxides (LDOs) as well as an in situ DRIFT analysis to determine the CO 2 sorption mechanism of these samples. The Mg−Al−palmitate layered double hydroxides (LDHs) coated with (Li−Na−K)NO 3 molten salts were successfully prepared by coprecipitation and wet impregnation methods and their CO 2 capture performance have been systematically tested under different high pressures and different adsorption temperatures. Results showed high and stable CO 2 sorption (7−8 mmol CO 2 /g) at moderate temperatures, even after 10 cycles. Complementary, an in situ DRIFT analysis evidenced that nitrate addition to LDH samples plays an important role during CO 2 sorption process at temperatures as high as 350 °C. Thus, CO 2 is incorporated on the NO 3 − melted, producing NO 2 − and CO 3 2− , where O − is released from the nitrate to nitrite. After that, CO 3 2− reacts with the LDO material forming MgCO 3 . In that second reaction, O − is reincorporated to the nitrite, recovering the NO 3 − initial species.

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“…Later on, Li5(Al1−xFex)O4 solid solutions with different compositions prepared and investigated for CO2 capture. 172 Figure 33 indicates oxygen addition can improve CO2 sorption during the first moment and at the end of the isotherms between 400 and 600 °C. The mechanism that how Fe enhances the CO2 sorption can be explained in two different ways: (i) iron has the chemical ability to dissociate the oxygen molecules, facilitating the whole carbonation process, and (ii) iron can present different oxidation states, which may induce higher and faster oxygen affinity and diffusion.…”

Section: Lithium Ferrites and Gallatesmentioning

confidence: 98%

Recent advances in lithium containing ceramic based sorbents for high-temperature CO₂ capture

et al. 2019

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Synthesis and evaluation as CO2 chemisorbent of the Li5(Al1−Fe )O4 solid solution materials: Effect of oxygen addition

Cited by 14 publications

References 43 publications

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

High and Efficient CO₂ Capture in Molten Nitrate-Modified Mg–Al–Palmitate Layered Double Oxides at High Pressures and Elucidation of Carbonation Mechanisms by in Situ DRIFT Spectroscopy Analysis

Recent advances in lithium containing ceramic based sorbents for high-temperature CO₂ capture

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Synthesis and evaluation as CO2 chemisorbent of the Li5(Al1−Fe )O4 solid solution materials: Effect of oxygen addition

Cited by 14 publications

References 43 publications

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

High and Efficient CO2 Capture in Molten Nitrate-Modified Mg–Al–Palmitate Layered Double Oxides at High Pressures and Elucidation of Carbonation Mechanisms by in Situ DRIFT Spectroscopy Analysis

Recent advances in lithium containing ceramic based sorbents for high-temperature CO2 capture

Contact Info

Product

Resources

About

High and Efficient CO₂ Capture in Molten Nitrate-Modified Mg–Al–Palmitate Layered Double Oxides at High Pressures and Elucidation of Carbonation Mechanisms by in Situ DRIFT Spectroscopy Analysis

Recent advances in lithium containing ceramic based sorbents for high-temperature CO₂ capture