Integrated CO2 capture and utilisation: A promising step contributing to carbon neutrality

Carbon Capture Science & Technology, Journal Year: 2023, Volume and Issue: 7, P. 100116 - 100116

Published: May 25, 2023

The release of CO2 into the atmosphere is problematic; however, it an abundant, renewable, and inexpensive carbon resource. In past, environmental problems caused by excessive emissions, such as global warming ocean acidification, have become increasingly severe. Carbon capture utilisation (CCU) has drawn intensive interest due to its capacity sequester utilise a source produce high-value chemicals fuels. However, state-of-the-art CCU exhibits poor economics technological complexity extensive energy input, multiple reactor configuration, sorbent transfer between reactors for regeneration. Integrated (ICCU) directly utilises CO2-containing exhaust gas in situ upgrades them valuable products highly intensified process, representing more direct promising path emission control. A series high-performance dual functional materials (DFMs) composed catalytic adsorbent sites succeeded various ICCU applications. this account, we first briefly introduced research background technology motivation developing Furthermore, conducted detailed description from three aspects: ICCU-methanation, ICCU-dry reforming methane (DRM) ICCU-reverse water shift reaction (RWGS). particular, investigated optimal adsorption specific characteristics solved problem temperature matching sites. addition, mechanism underlying been explored, effect interfering components on performance real plant flue gases future applications also analysed. Significantly, catalyst stability was effectively improved investigating causes deactivation. Finally, although conversion still preliminary stages, can see that current results already indicate prospects. In-situ high-value-added chemical feedstock will be very attractive application reducing greenhouse recycling resources. We are committed promoting industrialisation large-scale production technology.

Language: Английский

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Advancements in catalytic, photocatalytic, and electrocatalytic CO2 conversion processes: Current trends and future outlook

Journal of CO2 Utilization, Journal Year: 2024, Volume and Issue: 80, P. 102682 - 102682

Published: Jan. 23, 2024

Climate change, which is caused by increasing greenhouse gas (GHG) emissions, poses a serious threat to humanity, impacting economies, societies, and the environment. Carbon dioxide (CO2), major contributor effect, responsible for climate change thus must be reduced. capture, conversion, storage (CCUS) technology, involves catalytic, photocatalytic, electrocatalytic conversions, promising method reducing CO2 emissions converting into valuable products. Recent advances in electrocatalytic, photocatalytic reduction of have highlighted potential environmental economic benefits these technologies. However, practical application techniques challenging requires scientific research engineering efforts develop efficient materials capable simultaneously capturing it Therefore, this review presents comprehensive analysis various catalytic systems capture conversion. This aims identify advantages limitations In addition, identified challenges future prospects proposed methods are outlined. Thus, article covers current trends perspectives field combating through management.

Language: Английский

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Ni-functionalized Ca@Si yolk-shell nanoreactors for enhanced integrated CO2 capture and dry reforming of methane via confined catalysis

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 348, P. 123838 - 123838

Published: April 24, 2024

The emerging integrated CO2 capture and utilization (ICCU) potentially contributes to net zero emissions with low cost high efficiency. catalytic performance in ICCU process is highly restricted by the equilibriums of carbonate decomposition dry reforming methane (DRM). Here, we engineer a unique yolk-shell dual functional nanoreactor construction improve via confined catalysis. By tailoring carbonates kinetics confining diffusion path, ∼92% conversion achieved over (Ni/Ca)@Si shows no distinct activity loss 10 cycles at 650 °C. formed Ca2SiO4 shells restrain sintering CaO yolks acting as physical barriers, stabilize Ni particle size. It also confirmed on situ DRIFTS that DRM might occur carbonyls, formates CHO intermediates, which species are dependent Ni-carbonates interfaces.

Language: Английский

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Ni/CaO-based dual-functional materials for calcium-looping CO2 capture and dry reforming of methane: Progress and challenges

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 482, P. 148476 - 148476

Published: Jan. 23, 2024

Language: Английский

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A review on catalyst advances for photothermal dry reforming of methane reaction

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 354, P. 128799 - 128799

Published: July 14, 2024

Language: Английский

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Synthetic Ni–CaO–CeO2 dual function materials for integrated CO2 capture and conversion via reverse water–gas shift reaction

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 317, P. 123916 - 123916

Published: April 25, 2023

Language: Английский

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CO2 capture from H2O and O2 containing flue gas integrating with dry reforming methane using Ni-doping CaO dual functional materials

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 468, P. 143712 - 143712

Published: May 25, 2023

Reducing carbon emissions remains a formidable challenge under present energy demands and structures. Integrated CO2 capture utilisation (ICCU) provides promising pathway for directly capturing simultaneously utilising from the diluted exhaust gas. Dry reforming of methane (DRM) can be integrated into step catalytic conversion captured with advantages two greenhouse gases to yield valuable syngas (CO + H2). The process has great challenges materials development efficient performance, in particular realistic conditions such as presence O2 H2O flue This work investigated ICCU-DRM using simulated (10 % 6.7 6.0 H2O) Ni-CaO dual functional materials, aiming optimise Ni loading metal support interaction. It is found that would significantly sinter further affect morphologies CaO adsorbents, resulting poorer performances. More notably, was firstly oxidised during subsequently went through pre-reduction period DRM step. Increased decreased difficulty activation; however, it derived more severe deposition. To avert direct contact deposition gas, extra steam gasification introduced, higher contributed selectively yielding by-product. Ni10-CaO DFM optimally performed <150 s delay, ∼85 ∼2 H2:CO ratio ∼75 CO selectivity CSG at 650 °C. interaction between poorly contributes performance due poor reducibility accessibility, particle size effects only play spectators this process.

Language: Английский

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Strategies to improve CaO absorption cycle stability and progress of catalysts in Ca-based DFMs for integrated CO2 capture-conversion: A critical review

Journal of environmental chemical engineering, Journal Year: 2023, Volume and Issue: 11(5), P. 111047 - 111047

Published: Sept. 19, 2023

Language: Английский

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Chemical looping CO2 capture and in-situ conversion as a promising platform for green and low-carbon industry transition: Review and perspective

Carbon Capture Science & Technology, Journal Year: 2023, Volume and Issue: 10, P. 100169 - 100169

Published: Nov. 23, 2023

Industrial flue gas and solid waste with the characteristics of large emissions complicated distributions are two issues for industry, due to that sequential CO2 capture utilization shows high energy-cost penalties faces low reutilization ratio. As a powerful process intensification strategy, chemical looping in-situ conversion (CL-ICCC) provides an effective solution handle those issues. However, current researches on CL-ICCC aim develop configurations, design bifunctional materials, reveal reaction mechanisms, which ignore how apply realizing purification simultaneously in industry. Herein, after reviewing status upgrade, industrial system integration, perspective is proposed highlight as promising platform green low-carbon industry transition. In system, enters reactor reacts derived materials separate from other impurities. reactor, reduction agents introduced spill over convert it into value-added chemicals. This review provide new pathway establish self-digestion system.

Language: Английский

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Synergistic performance of Ni-Ca based dual functional materials under the coexistence of moisture and oxygen in CO2 source for integrated carbon capture and utilisation

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 326, P. 124866 - 124866

Published: Aug. 22, 2023

Global warming and climate change require urgent reduction of CO2 emissions. Integrated carbon capture utilisation combined with dry reforming methane (ICCU-DRM) has the potential to mitigate greenhouse gas emissions by capturing converting CH4 into valuable syngas. However, performance stability dual-functional materials (DFMs) are unclear under real-world flue conditions, particularly in presence steam O2. In this study, we elucidated mechanisms a Ni0.05/CaO0.95 DFM various conditions investigated effects O2 on uptake, CO H2 yields cyclic stability. Our approach includes synthesis evaluation using advanced characterisation techniques, such as XRD, in-situ infrared spectroscopy, CH4-TPR, SEM, EXD, FIB-SEM, BET, XPS, gain insights properties behaviour different conditions. The findings show that simulated condition (10.0 % + 6.0 H2O 6.7 O2/N2), there was significant deterioration performance, uptake only 5.7 mmol.g-1, average yield 11 mmol.g-1 6.2 mmol.g-1. While ideal CO2/N2), were 10.7 16.9 23.1 respectively. FIB-SEM XPS analysis highlighted effect during ICCU-DRM. Notably, promoted oxidation Ni, resulting decreased catalytic activity volumetric expansion Ni particles. Furthermore, adsorption, inducing additional CaO component DFM. These synergistic expansions form dense shell surface, hindering internal NiO, thereby diminishing performance.

Language: Английский

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