High-temperature CO2 sorption by Ca-doped Li4SiO4 sorbents

Chen, Xiaoxiang; Xiong, Zhuo; Qin, Y.X.; Gong, Bengen; Tian, Chong; Zhao, Yuemin; Zhang, Junying; Chen, Zheng

doi:10.1016/j.ijhydene.2016.05.267

Cited by 73 publications

(22 citation statements)

References 52 publications

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“…Subha et al [50] studied the CO 2 absorption by Li 4 SiO 4 material doped with Y 2 O 3 , Gd 2 O 3 or LaPO 4 , and found that both Y 2 O 3 and Gd 2 O 3 improved the CO 2 absorption capacity of Li 4 SiO 4 , and Y 2 O 3 -doped Li 4 SiO 4 retained the highest CO 2 absorption capacity due to the segregation of second phase created by the doped unreacted Y 2 O 3 . Chen et al [51] reported that Ca-doped Li 4 SiO 4 material achieved high CO 2 absorption capacity and they proposed a modified double-shell mechanism to describe the CO 2 absorption and regeneration mechanism of Ca-doped Li 4 SiO 4 as shown in Figure 9. The transformation of Ca 2 SiO 4 to Li 2 CaSiO 4 during CO 2 absorption process was beneficial of transferring CO 2 from Li 4 SiO 4 surface to the core, which reduced the diffusion resistance and improved CO 2 absorption, and regeneration was also correspondingly enhanced.…”

Section: Synthesis Of Li4sio4 Materials With Superior Cyclic Absormentioning

confidence: 99%

Performance of Li4SiO4 Material for CO2 Capture: A Review

Yan

et al. 2019

IJMS

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Lithium silicate (Li4SiO4) material can be applied for CO2 capture in energy production processes, such as hydrogen plants, based on sorption-enhanced reforming and fossil fuel-fired power plants, which has attracted research interests of many researchers. However, CO2 absorption performance of Li4SiO4 material prepared by the traditional solid-state reaction method is unsatisfactory during the absorption/regeneration cycles. Improving CO2 absorption capacity and cyclic stability of Li4SiO4 material is a research highlight during the energy production processes. The state-of-the-art kinetic and quantum mechanical studies on the preparation and CO2 absorption process of Li4SiO4 material are summarized, and the recent studies on the effects of preparation methods, dopants, and operating conditions on CO2 absorption performance of Li4SiO4 material are reviewed. Additionally, potential research thoughts and trends are also suggested.

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Section: Synthesis Of Li4sio4 Materials With Superior Cyclic Absormentioning

confidence: 99%

Performance of Li4SiO4 Material for CO2 Capture: A Review

Yan

et al. 2019

IJMS

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“…[20] Thus, under the realistic flue gas conduction (a low CO 2 concentration of 15 vol %), only half the Li 4 SiO 4 reacted with CO 2 even with long reaction times ( � 2 h). [21] The introduction of foreign elements, [22] especially alkali metals, [23] into the Li 4 SiO 4 structure is considered a feasible method. It is assumed that the alkali alkali elements reacted with Li 4 SiO 4 to form low-temperature eutectic compounds during the high-temperature absorption process, which reduced the CO 2 diffusion resistance.…”

Section: Introductionmentioning

confidence: 99%

Development of Alkali Nitrate‐Containing Li₄SiO₄ for High‐Temperature CO₂ Capture

et al. 2018

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High efficiency alkali nitrate‐containing Li4SiO4 sorbents were synthesized by a hydration technique to improve their sorption performances at low CO2 concentrations. X‐ray diffraction (XRD), scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC), and thermogravimetric analyses were used to detect the characteristics of the samples. The results showed that the presence of KNO3 and NaNO3 induced small crystallite size, corrugated morphologies and the formation of eutectic phases, noticeably facilitating sorption processes. At the optimized additive amount of 0.035 mol %, NaNO3‐containing Li4SiO4 reached a maximum absorption capacity (≈34.6 wt %). Moreover, both alkali nitrate‐containing Li4SiO4 sorbents showed good cyclic properties, demonstrating their great potential for high‐temperature CO2 capture.

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“…According to the assumption of Jander and Ginstling–Brounshtein models, the products layer of Li 2 CO 3 and Li 2 SiO 3 is mixed with each other, and CO 2 must diffuse through the mixture and then react with Li 4 SiO 4 . But it was reported that the products of Li 4 SiO 4 existed in the form of double‐shell rather than mixture . According to the double shell mechanism, in the absorption reaction process on Li 4 SiO 4 sorbent, CO 2 should diffuse through the solid Li 2 CO 3 shell and react with Li + and O 2− on the outer surface of the Li 2 SiO 3 shell.…”

Section: Resultsmentioning

confidence: 99%

Behaviors and kinetic models analysis of Li₄SiO₄ under various CO₂ partial pressures

et al. 2017

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The absorption behaviors of Li4SiO4 sorbent under various CO2 partial pressures and temperatures were investigated through numerical and experimental methods. It was found that Li4SiO4 showed poor absorption capacity at high temperatures (>525°C) under CO2 partial pressure of 5066 Pa. This phenomenon was explained by the thermodynamic results from FactSage5.5 software. Meanwhile, a modified Jander‐Zhang model based on the double‐shell structure of the Li4SiO4 sorbent was developed to describe the absorption kinetic behaviors of CO2 on Li4SiO4. The results showed that the modified Jander‐Zhang model could fit the kinetic experimental data well. Furthermore, the influence of steam on CO2 absorption was also analyzed by the modified Jander‐Zhang model. The results showed that the activation energy in the absorption process with steam was smaller than that without steam, which indicated that the presence of steam could promote the CO2 diffusion in product layer, therefore, improving the sorption capacity. © 2017 American Institute of Chemical Engineers AIChE J, 63: 2153–2164, 2017

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High-temperature CO2 sorption by Ca-doped Li4SiO4 sorbents

Cited by 73 publications

References 52 publications

Performance of Li4SiO4 Material for CO2 Capture: A Review

Performance of Li4SiO4 Material for CO2 Capture: A Review

Development of Alkali Nitrate‐Containing Li₄SiO₄ for High‐Temperature CO₂ Capture

Behaviors and kinetic models analysis of Li₄SiO₄ under various CO₂ partial pressures

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High-temperature CO2 sorption by Ca-doped Li4SiO4 sorbents

Cited by 73 publications

References 52 publications

Performance of Li4SiO4 Material for CO2 Capture: A Review

Performance of Li4SiO4 Material for CO2 Capture: A Review

Development of Alkali Nitrate‐Containing Li4SiO4 for High‐Temperature CO2 Capture

Behaviors and kinetic models analysis of Li4SiO4 under various CO2 partial pressures

Contact Info

Product

Resources

About

Development of Alkali Nitrate‐Containing Li₄SiO₄ for High‐Temperature CO₂ Capture

Behaviors and kinetic models analysis of Li₄SiO₄ under various CO₂ partial pressures