Recent advances in potassium-based adsorbents for CO2 capture and separation: a review

Guo, Yanxia; Sun, Jian; Wang, Ruilin; Li, Weiling; Zhao, Chuanwen; Li, Changhai; Zhang, Jiaqing

doi:10.1016/j.ccst.2021.100011

Cited by 48 publications

(11 citation statements)

References 163 publications

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“…In the chemical adsorption of CO 2 , the alkali metal carbonate reacts with CO 2 and water vapor at 40–80 °C to form an alkali metal bicarbonate (M 2 CO 3 + CO 2 + H 2 O ↔ 2MHCO 3 ). In comparison, decarbonation occurs at around 120 °C . Recently, the low-temperature CO 2 capture sorbents have been widely studied for the DAC process. , Despite the advantage of low-temperature carbonation and decarbonation, the common problem is that the overall carbonation reaction using alkali metal carbonates is relatively slow.…”

Section: Sorbent-based Co2 Capture Technologiesmentioning

confidence: 99%

“…In comparison, decarbonation occurs at around 120 °C. 80 Recently, the low-temperature CO 2 capture sorbents have been widely studied for the DAC process. 81,82 Despite the advantage of low-temperature carbonation and decarbonation, the common problem is that the overall carbonation reaction using alkali metal carbonates is relatively slow.…”

Section: Sorbent-based Co 2 Capture Technologiesmentioning

confidence: 99%

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Perspective on Sorption Enhanced Bifunctional Catalysts to Produce Hydrocarbons

Cruz

Shah

et al. 2022

ACS Catal.

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Sorption-enhanced catalysts are bifunctional materials consisting of a heterogeneous catalyst affixed to a solid sorbent with a combined capacity to selectively capture and convert CO2 directly to value-added fuels and chemicals in the same reactor. The benefits of facile separation of CO2, directly from air or from flue gas, and conversion to chemical commodities is appealing for developing an integrated carbon capture and utilization scheme. The growth of this area is rapidly expanding with interest from catalysis, materials design, and life-cycle analysis researchers. However, the promise of sorption-enhanced catalysts is limited by their reduced thermal stability, CO2 capture capacity, and restricted product streams to C1 hydrocarbons. The prime issue is that the reaction conditions for the capture of CO2, regeneration of the sorbent, and utilization can be vastly different. It remains a challenge to optimize both the properties of the sorbent support material and the heterogeneous catalyst used. This perspective summarizes the current state-of-the-art for the properties of solid sorbents, heterogeneous catalysts, and the combined sorbent-enhanced catalysts for producing hydrocarbons from CO2. Lastly, the perspective discusses challenges and future areas for improving the performance and capture efficiency of sorption-enhanced catalysts.

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Section: Sorbent-based Co2 Capture Technologiesmentioning

confidence: 99%

Section: Sorbent-based Co 2 Capture Technologiesmentioning

confidence: 99%

Perspective on Sorption Enhanced Bifunctional Catalysts to Produce Hydrocarbons

Cruz

Shah

et al. 2022

ACS Catal.

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“…Carbon dioxide (CO 2 ) is a key greenhouse gas, and its steady annual increase in the atmosphere has contributed to climate change. − Sea level rise, altered ocean currents, and extreme weather are just a few of the climate problems it has spawned, all of which pose serious threats to the long-term viability of human civilization. Energy security and environmental pollution are two of the most pressing issues in the world today, and the vigorous development of renewable energy sources is a major way to address these issues while also addressing the growing tension between ecological damage and resource constraints. − While low-carbon energy’s share has grown, national-level economic growth data shows that the world economy is still highly reliant on fossil fuels, the burning of which will contribute to the continued increase in CO 2 emissions. − The necessity of accelerating the pace of energy transition and ensuring energy security is therefore all the more urgent at this time. Within this, the effective control of CO 2 concentrations in the atmosphere will be a major environmental issue for humans. ,− Finding and implementing eco-friendly energy solutions should be a priority for academics.…”

Section: Introductionmentioning

confidence: 99%

Review on CeO₂-Based Photocatalysts for Photocatalytic Reduction of CO₂: Progresses and Perspectives

Cai

Jiang

et al. 2023

Energy Fuels

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A promising approach is to transform carbon dioxide (CO2) into renewable, high value-added products with minimal environmental impact and maximum efficiency. Many problems, including energy shortages and environmental degradation, are caused by high CO2 levels, but this can help. Photocatalytic reduction methods are a promising technology for solving these problems. Cerium dioxide (CeO2) is one of the most important rare earth oxides, and cerium dioxide-based photocatalysts have gained a lot of attention in recent years due to their distinctive features, such as their tunable electronic structures and their excellent photocatalytic performances. However, the wide energy band of cerium oxide limits its utilization of light. This review provides various strategies for the modification of cerium oxide, encompassing external atom doping, heterostructure fabrication, defect fabrication, and crystal plane modulation, to improve the catalytic performance of CeO2. The fundamentals of the conversion of CeO2-based photocatalysts into high value-added products are also summarized. Finally, the challenges and prospects of CeO2-based catalysts for photocatalytic reduction of CO2 are presented.

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“…3 Carbon capture, utilization, and sequestration (CCUS) represents an important technological option for reducing CO 2 emissions and is therefore key to achieving the carbon neutrality goal. 4,5 Although CCUS has been well understood and recognized, there are still concerns about the high capital costs, high energy consumption, and environmental issues caused by CO 2 leakages. 6 Recently, the CO 2 capture and CO 2 conversion processes have been integrated, and the integrated CO 2 capture and utilization (ICCU) scheme has gained increasing attention, regarding the advantages of low energy consumption and high efficiency.…”

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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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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Recent advances in potassium-based adsorbents for CO2 capture and separation: a review

Cited by 48 publications

References 163 publications

Perspective on Sorption Enhanced Bifunctional Catalysts to Produce Hydrocarbons

Perspective on Sorption Enhanced Bifunctional Catalysts to Produce Hydrocarbons

Review on CeO₂-Based Photocatalysts for Photocatalytic Reduction of CO₂: Progresses and Perspectives

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

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Recent advances in potassium-based adsorbents for CO2 capture and separation: a review

Cited by 48 publications

References 163 publications

Perspective on Sorption Enhanced Bifunctional Catalysts to Produce Hydrocarbons

Perspective on Sorption Enhanced Bifunctional Catalysts to Produce Hydrocarbons

Review on CeO2-Based Photocatalysts for Photocatalytic Reduction of CO2: Progresses and Perspectives

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

Contact Info

Product

Resources

About

Review on CeO₂-Based Photocatalysts for Photocatalytic Reduction of CO₂: Progresses and Perspectives

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