Novel lithium-based sorbents from fly ashes for CO2 capture at high temperatures

Olivares-Marín, Mara; Drage, Trevor C.; Maroto‐Valer, M. Mercedes

doi:10.1016/j.ijggc.2009.12.015

Cited by 177 publications

(135 citation statements)

References 27 publications

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“…22 The highest temperature for carbonates capturing CO 2 at pre-combustion (T 1 ) (P CO2 =20 bar) and post-combustion (T 2 ) (P CO2 =0.1 bar) conditions as well as the phase transition temperature (T tr ) of K 2 CO 3 ·1.5H 2 O into K 2 CO 3 are also given in this Lithium silicate (Li 4 SiO 4 ) and zirconate (Li 2 ZrO 3 ) have been proposed experimentally as promising high-temperature CO 2 sorbents. [43][44][45][46][47][48][49] And our previous theoretical studies confirmed these findings.…”

Section: Application To Dehydrated and Anhydrous Potassium Carbonatessupporting

confidence: 62%

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Theoretical calculating the thermodynamic properties of solid sorbents for CO{sub 2} capture applications

Duan¹

2012

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Since current technologies for capturing CO 2 to fight global climate change are still too energy intensive, there is a critical need for development of new materials that can capture CO 2 reversibly with acceptable energy costs. Accordingly, solid sorbents have been proposed to be used for CO 2 capture applications through a reversible chemical transformation. By combining thermodynamic database mining with first principles density functional theory and phonon lattice dynamics calculations, a theoretical screening methodology to identify the most promising CO 2 sorbent candidates from the vast array of possible solid materials has been proposed and validated. The calculated thermodynamic properties of different classes of solid materials versus temperature and pressure changes were further used to evaluate the equilibrium properties for the CO 2 adsorption/desorption cycles. According to the requirements imposed by the pre-and post-combustion technologies and based on our calculated thermodynamic properties for the CO 2 capture reactions by the solids of interest, we were able to screen only those solid materials for which lower capture energy costs are expected at the desired pressure and temperature conditions. Only those selected CO 2 sorbent candidates were further considered for experimental validations. The ab initio thermodynamic technique has the advantage of identifying thermodynamic properties of CO 2 capture reactions without any experimental input beyond crystallographic structural information of the solid phases involved. Such methodology not only can be used to search for good candidates from existing database of solid materials, but also can provide some guidelines for synthesis new materials. In this presentation, we first introduce our screening methodology and the results on a testing set of solids with known thermodynamic properties to validate our methodology. Then, by applying our computational method to several different kinds of solid systems, we demonstrate that our methodology can predict the useful information to help developing CO 2 capture Technologies.

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Section: Application To Dehydrated and Anhydrous Potassium Carbonatessupporting

confidence: 62%

“…These results are in good agreement with available experimental measurements. [43][44][45][46][47][48][49] (a) (b) Figure 9. The calculated thermodynamic properties of some alkali metal silicate and zirconates capture CO 2 .…”

Section: Application To Dehydrated and Anhydrous Potassium Carbonatesmentioning

confidence: 99%

Theoretical calculating the thermodynamic properties of solid sorbents for CO{sub 2} capture applications

Duan¹

2012

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“…During this pretreatment process, a large amount of acidic wastewater with metal ions including Mg, Al, and Fe, is produced. The discharge of such wastewater causes severe environmental problems [27,[35][36][37]. Thus, an environmentally benign scheme for the utilization of the vermiculite mineral is highly desired for a more sustainable society.…”

Section: Introductionmentioning

confidence: 99%

Environmental Benign Synthesis of Lithium Silicates and Mg-Al Layered Double Hydroxide from Vermiculite Mineral for CO2 Capture

Zhou

Louis

et al. 2017

Catalysts

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This research introduces a completely new environmental benign synthesis route for obtaining two kinds of inter-mediate and high temperature CO 2 sorbents, Mg-Al layered double hydroxide (LDH) and Li 4 SiO 4 , from vermiculite. The mineral vermiculite was leached with acid, from which the obtained SiO 2 was used for the synthesis of Li 4 SiO 4 and the leaching waste water was used for the synthesis of Mg-Al LDH. Therefore, no waste was produced during the whole process. Both Li 4 SiO 4 and Mg-Al LDH sorbents were carefully characterized using XRD, SEM, and BET analyses. The CO 2 capturing performance of these two sorbents was comprehensively evaluated. The influence of the Li/Si ratio, calcination temperature, calcination time, and sorption temperature on the CO 2 sorption capacity of Li 4 SiO 4 , and the sorption temperature on the CO 2 sorption capacity of LDH, were investigated. The optimal leaching acid concentration for vermiculite and the CO 2 sorption/desorption cycling performance of both the Li 4 SiO 4 and Mg-Al LDH sorbents were determined. In sum, this demonstrated a unique and environment-friendly scheme for obtaining two CO 2 sorbents from cheap raw materials, and this idea is applicable to the efficient utilization of other minerals.

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“…On the other hand, Li 2 OSiO 2 ceramics with the long-distance order have attracted much attention, because of their functional properties, such as tritium breeding materials, 5),6) CO 2 captures, 7), 8) ionic conductors, 9) and lithium ion battery materials. 10),11) Among of them, alkali metasilicate Li 2 SiO 3 has been actively investigated as luminescent material, 12),13) lithium battery materials, 14), 15) and optical wave guides.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Li<sub>2</sub>SiO<sub>3</sub> using novel water-assisted solid state reaction method

Watanabe

Inoi

Kim

et al. 2017

J. Ceram. Soc. Japan

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Single phase of orthorhombic Li 2 SiO 3 was synthesized via a novel soft-chemical synthesis method, water assisted solid state reaction method at 343353 K for 60 min. The crystal structure of the samples was characterized by X-ray diffraction (XRD) analysis. The scanning electron microscope (SEM) observation revealed that the estimated size of the particles is 50200 nm. The XRD patterns and SEM images were compared to those of samples by a conventional solid state method at 1173 K for 4 h.

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Novel lithium-based sorbents from fly ashes for CO2 capture at high temperatures

Cited by 177 publications

References 27 publications

Theoretical calculating the thermodynamic properties of solid sorbents for CO{sub 2} capture applications

Theoretical calculating the thermodynamic properties of solid sorbents for CO{sub 2} capture applications

Environmental Benign Synthesis of Lithium Silicates and Mg-Al Layered Double Hydroxide from Vermiculite Mineral for CO2 Capture

Synthesis of Li<sub>2</sub>SiO<sub>3</sub> using novel water-assisted solid state reaction method

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