Integrated CO2 capture and In-Situ methanation by efficient dual functional Li4SiO4@Ni/CeO2

Lv, Zongze; Ruan, Jiaqi; Tu, Weifeng; Hu, Xun; He, Dong; Huang, Xin; Qin, Changlei

doi:10.1016/j.seppur.2022.123044

Cited by 46 publications

(11 citation statements)

References 37 publications

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“…26 Qin et al developed dual-functional Li 4 SiO 4 @Ni/CeO 2 samples with varied Ni loadings (2.5−7.5 wt %) for ICCU-M, and the Ni 5 −CeLi sample showed good ICCU-M performance. 27 Bermejo-Loṕez et al investigated the Ni loading effect on the ICCU-M performance of the Ni-15CaO/ Al 2 O 3 and Ni-10Na 2 CO 3 /Al 2 O 3 DFMs. The average Ni particle size was determined by the interaction between Ni and the alkaline adsorbents, and it increased with the increase in Ni loading density.…”

Section: Introductionmentioning

confidence: 99%

“…Ni loading has a significant impact on the ICCU performance of Ni-based DFMs . Qin et al developed dual-functional Li 4 SiO 4 @Ni/CeO 2 samples with varied Ni loadings (2.5–7.5 wt %) for ICCU-M, and the Ni 5 –CeLi sample showed good ICCU-M performance . Bermejo-López et al investigated the Ni loading effect on the ICCU-M performance of the Ni-15CaO/Al 2 O 3 and Ni-10Na 2 CO 3 /Al 2 O 3 DFMs.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on Integrated CO₂ Capture and Conversion Performance of Ni-CaO Dual-Function Materials Pellets: Effect of Ni Loading and Optimization of Operating Parameters

Yu,

Wu,

Liu

et al. 2023

Energy Fuels

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Integrated CO2 capture and utilization (ICCU) has been regarded as an innovative strategy to realize large-scale CO2 emission reduction. The rational design of robust dual-function materials (DFMs) and the optimization of operating parameters are essential for the intensification of the ICCU process. In this work, Ni-CaO DFMs pellets with Ni loadings varying in the 1–20 wt % range are prepared for CO production via integrated CO2 capture and reversed water gas shift (RWGS) reaction. The effect of Ni loading on the structure–reactivity relationships of the Ni-CaO DFMs pellets is investigated. CO2 capture capacity decreases noticeably at higher loadings of 15 and 20 wt % due to reduced surface basicity. Increased Ni loading enhances reducibility but results in increased Ni particle size, decreased Ni specific surface area, and inferior Ni dispersion, and CO yield thus increases first and then declines. CO2 conversion and CO selectivity are almost free from the Ni loading effect. The influences of operating parameters on the ICCU performance of the 5Ni-CaO-P DFMs pellets are investigated using an orthogonal experimental design. The influencing degree of the operating parameters on CO2 capture capacity follows the order of H2 concentration for catalyst reduction > reaction temperature > CO2 concentration > weight hourly space velocity (WHSV). Reaction temperature and H2 concentration in the RWGS stage represent the two primary factors affecting the CO2 conversion performance. Multiple linear regression analyses are performed, and regression equations for describing the relationships between the various attributes and predictors are acquired. The optimal combination of the operating variables is identified as the reaction temperature of 650 °C, WHSV of 135 000 mL/(h·gcat), 25% H2 for catalyst reduction, 10% CO2 for capture, and 5% H2 for in situ RWGS. The desired 5Ni-CaO-P sample exhibits a high CO2 uptake of 16.05 mmol of CO2/g, a great CO yield of 5.77 mmol of CO/g, a remarkable CO2 conversion of ∼99%, a great CO selectivity of ∼90%, and good stability in multiple cycles under optimized working conditions. These results will guide the rational design of DFMs pellets and lay the groundwork for their scale-up applications in ICCU.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation on Integrated CO₂ Capture and Conversion Performance of Ni-CaO Dual-Function Materials Pellets: Effect of Ni Loading and Optimization of Operating Parameters

Yu,

Wu,

Liu

et al. 2023

Energy Fuels

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“…These combinations are often referred to as dual function materials (DFM). [38][39][40][41][42][43] However, because the catalyst and the adsorbent are intimately associated in the same solid, a large amount of catalyst is tied up in the material and unused during the adsorption phase. This also implies that the gas source utilized for CO 2 gas capture interacts directly with the active metal in the catalyst.…”

Section: Introductionmentioning

confidence: 99%

“…One avenue to avoid the need for a solvent with heterogeneous catalysts is to combine the active metal, such as ruthenium or nickel, with an alkali or alkaline earth metal, such as potassium or calcium, that can capture CO 2 for further reactions. These combinations are often referred to as dual function materials (DFM) [38–43] . However, because the catalyst and the adsorbent are intimately associated in the same solid, a large amount of catalyst is tied up in the material and unused during the adsorption phase.…”

Section: Introductionmentioning

confidence: 99%

CO₂ Capture and Direct Air CO₂ Capture Followed by Integrated Conversion to Methane Assisted by Metal Hydroxides and a Ru/Al₂O₃ Catalyst

Koch,

Suhail,

Goeppert

et al. 2023

ChemCatChem

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Rising CO2 levels are leading to an increase in atmospheric greenhouse gas effect. Hydroxide salts have previously been shown to be promising reagents for capturing CO2. Utilizing a 5%Ru/Al2O3 catalyst, the carbonates obtained through CO2 capture can then be hydrogenated to methane. This conversion occurs at relatively mild temperatures from 200°C to 250°C under 40 to 70 bar H2 with yields of up to 100%. Natural sources of calcium carbonate, like eggshells and seashells, can also be partially converted to methane. The direct air CO2 capture and conversion of CO2 to methane was achieved as well in quantitative yields.

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“…[7][8][9][10][11] However, the high operating temperature above 700 C not only aggravates the sintering of sorbents and catalysts, 12 but also makes it more costly and challenging for large-scale industrial deployments due to the strict heat-resistant requirements for the installation materials, the high energy consumption, and the safety issues. 5,[13][14][15] In contrast, the alkaline ceramic materials, such as Li 4 SiO 4 through the lithium-looping (LiL, Li 4 SiO 4 + CO 2 $ Li 2 SiO 3 + Li 2 CO 3 ), [16][17][18][19] exhibit a high CO 2 capture capability and excellent cycle stability in a relatively lower temperature range of 500-600 C. [20][21][22][23] To match this CO 2 capture temperature, the revised water gas shift (RWGS) reaction can be a more promising choice than the dry reforming of methane (700-800 C) and CO 2 methanation (300-400 C) for the in situ CO 2 conversion. [24][25][26][27][28] However, there is few research working on the LiL@RWGS-based iCCC technology, which can be caused by the scarcity of lithium resources due to the fast development of lithium-ion batteries (LIBs).…”

Section: Introductionmentioning

confidence: 99%

Synergistic promotions of K doping on CO₂ capture and in situ conversion

Xie,

Shao,

Sun

et al. 2023

AIChE Journal

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The integrated CO2 capture and conversion (iCCC) technology has been recognized as a promising strategy for upcycling the emitted CO2 into artificial carbon sequestration but still demands highly efficient dual functional materials (DFMs). We develop an efficient iCCC process of the integrated lithium‐looping (LiL) and reverse water gas shift reaction through deeply understanding K doping in the novel Kx‐Li4SiO4@Niy DFMs. The appropriate K doping enables the fast diffusion of CO2 and H2 into the bulk DFMs through forming LiKCO3 surface eutectic layer as well as strongly interacts with catalyst Ni to generate new medium basic sites for synergistic promotions of CO2 capture and in situ conversion. More importantly, after the pelletization, the LP‐K0.2‐Li4SiO4@Ni10 DFM (20–40 mesh) avoids the agglomeration and achieves an excellent and stable iCCC cycle performance, with CO2 capture capacity of 3.8 mmol/g, CO2 conversion efficiency of 90%, and CO selectivity close to 100% at 550°C in one fixed‐bed column.

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Integrated CO2 capture and In-Situ methanation by efficient dual functional Li4SiO4@Ni/CeO2

Cited by 46 publications

References 37 publications

Investigation on Integrated CO₂ Capture and Conversion Performance of Ni-CaO Dual-Function Materials Pellets: Effect of Ni Loading and Optimization of Operating Parameters

Investigation on Integrated CO₂ Capture and Conversion Performance of Ni-CaO Dual-Function Materials Pellets: Effect of Ni Loading and Optimization of Operating Parameters

CO₂ Capture and Direct Air CO₂ Capture Followed by Integrated Conversion to Methane Assisted by Metal Hydroxides and a Ru/Al₂O₃ Catalyst

Synergistic promotions of K doping on CO₂ capture and in situ conversion

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Integrated CO2 capture and In-Situ methanation by efficient dual functional Li4SiO4@Ni/CeO2

Cited by 46 publications

References 37 publications

Investigation on Integrated CO2 Capture and Conversion Performance of Ni-CaO Dual-Function Materials Pellets: Effect of Ni Loading and Optimization of Operating Parameters

Investigation on Integrated CO2 Capture and Conversion Performance of Ni-CaO Dual-Function Materials Pellets: Effect of Ni Loading and Optimization of Operating Parameters

CO2 Capture and Direct Air CO2 Capture Followed by Integrated Conversion to Methane Assisted by Metal Hydroxides and a Ru/Al2O3 Catalyst

Synergistic promotions of K doping on CO2 capture and in situ conversion

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Investigation on Integrated CO₂ Capture and Conversion Performance of Ni-CaO Dual-Function Materials Pellets: Effect of Ni Loading and Optimization of Operating Parameters

Investigation on Integrated CO₂ Capture and Conversion Performance of Ni-CaO Dual-Function Materials Pellets: Effect of Ni Loading and Optimization of Operating Parameters

CO₂ Capture and Direct Air CO₂ Capture Followed by Integrated Conversion to Methane Assisted by Metal Hydroxides and a Ru/Al₂O₃ Catalyst

Synergistic promotions of K doping on CO₂ capture and in situ conversion