K-doping effect in the kinetics of CO2 capture at high temperature over lithium silicates obtained from rice husks: In situ/operando techniques

Hoyos, Luis A. Salazar; Faroldi, Betina María Cecilia; Cornaglia, Laura María

doi:10.1016/j.ceramint.2020.08.269

Cited by 14 publications

(4 citation statements)

References 47 publications

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“…The formation of a molten phase had been hypothesized to lead to an enhanced ionic mobility and in turn a higher CO 2 absorption . Very similar observations were made in (Li,Na)ZrO 3 , and in K-doped Li 4 SiO 4 . A further study utilized in situ Raman spectroscopy to probe the crystallization of a range of relevant carbonate phases including calcite and magnesite.…”

Section: Mechanistic Insights Into Parameters Influencing Co2 Absorpt...mentioning

confidence: 74%

“…477 Very similar observations were made in (Li,Na)ZrO 3 , 596 and in Kdoped Li 4 SiO 4 . 597 A further study utilized in situ Raman spectroscopy to probe the crystallization of a range of relevant carbonate phases including calcite and magnesite. It was observed that both amorphous and crystalline phases can act as precursors for nucleation.…”

Section: In Situ Experimental Methods For New Mechanistic Insightsmentioning

confidence: 99%

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CO₂ Capture at Medium to High Temperature Using Solid Oxide-Based Sorbents: Fundamental Aspects, Mechanistic Insights, and Recent Advances

et al. 2021

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Carbon dioxide capture and mitigation form 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, with 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 medium 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: Mechanistic Insights Into Parameters Influencing Co2 Absorpt...mentioning

confidence: 74%

Section: In Situ Experimental Methods For New Mechanistic Insightsmentioning

confidence: 99%

CO₂ Capture at Medium to High Temperature Using Solid Oxide-Based Sorbents: Fundamental Aspects, Mechanistic Insights, and Recent Advances

et al. 2021

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show abstract

“…The formation of a molten phase had been hypothesized to lead to an enhanced ionic mobility and in turn a higher CO2 absorption [450]. Very similar observations were made in (Li,Na)ZrO3 [529], and in K-doped Li4SiO4 [530]. A further study utilized in situ Raman spectroscopy to probe the crystallization of a range of relevant carbonate phases including calcite and magnesite.…”

Section: Infrared and Raman Spectroscopymentioning

confidence: 75%

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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“…To understand the CO 2 adsorption process of various samples, adsorption curves in the 1st and 20th cycles are depicted and fitted using a double-exponential model, as shown in eq . , It is known that CO 2 chemisorption on lithium ceramics is a two-step process: the chemisorption between CO 2 and Li 4 SiO 4 directly occurring on the surface and the diffusion of Li + or CO 2 throughout the layer to reach the reaction surface . Here, y represents the weight percent of CO 2 adsorbed, t is the reaction time, and k 1 and k 2 are rate constants of Li 4 SiO 4 adsorption and diffusion processes, respectively.…”

Section: Resultsmentioning

confidence: 99%

Simplifying and Optimizing Li₄SiO₄ Preparation from Spent LiFePO₄ Batteries with Enhanced CO₂ Adsorption

Ruan,

Tong,

Ran

et al. 2023

ACS Sustainable Chem. Eng.

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A large amount of spent lithium batteries, especially lithium iron phosphate (LiFePO4), is discarded due to their limited lifespan and poses a great threat to the environment. At the same time, the potential application of Li4SiO4, an efficient high-temperature CO2 sorbent, is largely limited by the high cost of lithium resources. Thus, the preparation of Li4SiO4 from spent LiFePO4 batteries has great potential for achieving waste recycling and reducing CO2 capture costs. However, the process of recycling spent LiFePO4 batteries to synthesize Li4SiO4 sorbents still needs to be well investigated. This work proposes to simplify the preparation scheme by combing precipitation, Na doping, and synthesis processes and further optimizing the key variables of pH, Na2CO3 ratio, and heating rate. An optimal condition is determined to be pH = 9, Na2CO3 ratio = 11 wt %, and heating rate = 5 °C/min, and the sorbent prepared shows a superior stable CO2 capacity of 0.24 g/g in 80 adsorption/desorption cycles. The work develops an effective Li4SiO4 preparation scheme from spent LiFePO4 batteries with largely enhanced CO2 adsorption performance and reduced cost and could achieve a win–win situation in waste recycling and CO2 mitigation.

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K-doping effect in the kinetics of CO2 capture at high temperature over lithium silicates obtained from rice husks: In situ/operando techniques

Cited by 14 publications

References 47 publications

CO₂ Capture at Medium to High Temperature Using Solid Oxide-Based Sorbents: Fundamental Aspects, Mechanistic Insights, and Recent Advances

CO₂ Capture at Medium to High Temperature Using Solid Oxide-Based Sorbents: Fundamental Aspects, Mechanistic Insights, and Recent Advances

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

Simplifying and Optimizing Li₄SiO₄ Preparation from Spent LiFePO₄ Batteries with Enhanced CO₂ Adsorption

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K-doping effect in the kinetics of CO2 capture at high temperature over lithium silicates obtained from rice husks: In situ/operando techniques

Cited by 14 publications

References 47 publications

CO2 Capture at Medium to High Temperature Using Solid Oxide-Based Sorbents: Fundamental Aspects, Mechanistic Insights, and Recent Advances

CO2 Capture at Medium to High Temperature Using Solid Oxide-Based Sorbents: Fundamental Aspects, Mechanistic Insights, and Recent Advances

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

Simplifying and Optimizing Li4SiO4 Preparation from Spent LiFePO4 Batteries with Enhanced CO2 Adsorption

Contact Info

Product

Resources

About

CO₂ Capture at Medium to High Temperature Using Solid Oxide-Based Sorbents: Fundamental Aspects, Mechanistic Insights, and Recent Advances

CO₂ Capture at Medium to High Temperature Using Solid Oxide-Based Sorbents: Fundamental Aspects, Mechanistic Insights, and Recent Advances

Simplifying and Optimizing Li₄SiO₄ Preparation from Spent LiFePO₄ Batteries with Enhanced CO₂ Adsorption