Facile, time-saving cigarette butt-assisted combustion synthesis of modified CaO-based sorbents for high-temperature CO2 capture

Li, Hewen; Sun, Jian; Jiang, Qiran; Xia, Hongqiang; Cheng, Shan; Zhou, Zijian; Nie, Xinming; Zhao, Chuanwen

doi:10.1016/j.fuel.2022.126868

Cited by 17 publications

(2 citation statements)

References 67 publications

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“…However, some of the approaches have shown promising results in terms of CBs and cigarette filters (CFs) recycling in the fired clay bricks [ 10 ] and asphalt concrete [ 11 ], as the active carbons (ACs), as the sound of absorbing material [ 12 , 13 , 14 , 15 ], the thermal insulator [ 16 ], anode materials manufacturing [ 17 ], supercapacitors production [ 18 ], the fabrication of the environmental energy-enhanced solar steam evaporator [ 19 ], etc. Additionally, CBs have found application in the synthesis of nanostructured MnO x catalysts for NO x reduction within flaming combustion and smoldering processes [ 20 ], as well as in the CB-assisted combustion synthesis of modified CaO -based sorbents for high-temperature CO 2 capture [ 21 ]. Considering such wide use of CBs and/or CF for the purpose of obtaining more valuable products through recycling, a special place was occupied by the char (carbonaceous) (or “bio-char”) and activated carbons (ACs) (physically or chemically modified surfaces of chars (bio-chars)) materials production with a porous structure.…”

Section: Introductionmentioning

confidence: 99%

Upcycling of the Used Cigarette Butt Filters through Pyrolysis Process: Detailed Kinetic Mechanism with Bio-Char Characterization

Janković,

Kojić,

Milošević

et al. 2023

Polymers

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Thermo-chemical conversion via the pyrolysis of cigarette butt (CB) filters was successfully valorized and upcycled in the pre-carbonization and carbonization stages. The pre-carbonization stage (devolatilization) of the precursor material (cellulose acetate filter, r-CAcF) was analyzed by micro-scale experiments under non-isothermal conditions using TG-DTG-DTA and DSC techniques. The results of a detailed kinetic study showed that the decomposition of r-CAcF takes place via complex mechanisms, including consecutive reaction steps and two single-step reactions. Consecutive stages include the α-transition referred to as a cellulose polymorphic transformation (cellulose I → II) through crystallization mechanism changes, where a more thermodynamically ordered system was obtained. It was found that the transformation rate of cellulose I → II (‘cellulose regeneration’) is strongly affected by the presence of alkali metals and the deacetylation process. Two single-step reactions showed significant overlapping behavior, which involves a nucleation-controlled scission mechanism (producing levoglucosan, gaseous products, and abundant radicals) and hydrolytic decomposition of cellulose by catalytic cleavage of glycosidic bonds with the presence of an acidic catalyst. A macro-scale experiment showed that the operating temperature and heating rate had the most notable effects on the total surface area of the manufactured carbon. A substantial degree of mesoporosity with a median pore radius of 3.1695 nm was identified. The presence of macroporosity on the carbon surface and acidic surface functional groups was observed.

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Section: Introductionmentioning

confidence: 99%

Upcycling of the Used Cigarette Butt Filters through Pyrolysis Process: Detailed Kinetic Mechanism with Bio-Char Characterization

Janković,

Kojić,

Milošević

et al. 2023

Polymers

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“…Its preparation process is a typical CaCO 3 -consumption process, which converts carbon from semi-coke into downstream chemicals. However, after releasing CO 2 , this calcium resource is not effectively used, because it forms calcium carbide slag (CS; main component = Ca(OH) 2 ); (eq –). , CS can be used to prepare calcium oxide. Furthermore, steel slag is an industrial waste produced during the steel-making process.…”

Section: Introductionmentioning

confidence: 99%

An Innovative Approach to Prepare Calcium Oxide from Calcium Carbide Slag Based on Sequential Mineral Transformation

Ma,

Zhu,

Guan

et al. 2024

ACS Sustainable Resour. Manage.

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Calcium carbide slag (CS) is an industrial solid waste produced via the coal-based poly(vinyl chloride) process, and its main component is calcium hydroxide (Ca(OH) 2 ) (85−95 wt %). CS can be used instead of calcium carbonate (CaCO 3 ) to produce calcium oxide (CaO), reducing carbon dioxide (CO 2 ) emissions. Our group has reported that CaO can be prepared at lower temperatures using CS compared with existing processing temperature, where the calcination temperature decreases from 1000 to 700 °C when CaCO 3 is replaced with CS during CaO production. A comparison of the carbon emissions of CS and CaCO 3 -based CaO preparation processes show that using CS to produce CaO reduces CO 2 emissions by 977.62 kg/t. Herein, the CS-based CaO is explained by controlling the CS calcination temperature and mineral transformation. CS completely decomposes into CaO at 492 °C. The calcination temperature of CS is between 400 and 600 °C, where CaCO 3 is formed via the reaction of carbon and Ca(OH) 2 and water in CS. Furthermore, when the carbon content in CS is >4%, CaCO 3 is formed. When the calcination temperature is 700 °C, CaCO 3 decomposes into CaO. As the temperature increases, the metallurgical activity of CS increases, and its strength decreases. When the temperature is 700 °C, the compressive strength of CaO is 21.94 MPa, its metallurgical activity is 379.85 mL, and the CaO content is 95.14%. This study provides a new method for preparing CaO to simultaneously reduce carbon emissions and in-situ recycle CS.

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High‐Entropy Fluorite Oxide‐Modified CaO‐Based Sorbent Pellets for Enhanced High‐Temperature CO₂ Capture

Long,

Gu,

Wang

et al. 2024

Small

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The calcium looping technology employing CaO‐based sorbents is pivotal for capturing CO2 from flue gas. However, the intrinsic low thermodynamic stability of CaO‐based sorbents and the requisite molding step induce severe sintering issues, diminishing their cyclic stability. Herein, a high‐entropy fluorite oxide (HEFO) inert stabilizer premised on entropy stabilization and synergistic effect strategies is introduced. HEFO‐modified, CaO‐based sorbent pellets are synthesized via a rapid cigarette butt‐assisted combustion process (15 min) combined with the graphite molding method. Post‐multiple cycles, their CO2 capture capacity reaches 0.373 g g−1, which is 2.6‐fold superior to that of pure CaO, demonstrating markedly enhanced anti‐sintering properties. First, the subtle morphological and crystallographic modifications suggest that the inherent entropy stability of HEFO imparts robust thermal resistance. Concurrently, the disordered structure of single‐phase HEFO exhibits a high affinity for CaO, resulting in an interface binding energy of −1.83 eV, in sharp contrast to the −0.112 eV of pure CaO, thereby restricting CaO migration. Additionally, the multi‐element synergistic effect of HEFO reduces the energy barrier by 0.15 eV, leading to a 40% and 140% increase in carbonation and calcination rates, respectively. This work presents highly efficient and rapidly synthesized CaO‐based sorbent pellets, showcasing promising potential for industrial application.

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Facile, time-saving cigarette butt-assisted combustion synthesis of modified CaO-based sorbents for high-temperature CO2 capture

Cited by 17 publications

References 67 publications

Upcycling of the Used Cigarette Butt Filters through Pyrolysis Process: Detailed Kinetic Mechanism with Bio-Char Characterization

Upcycling of the Used Cigarette Butt Filters through Pyrolysis Process: Detailed Kinetic Mechanism with Bio-Char Characterization

An Innovative Approach to Prepare Calcium Oxide from Calcium Carbide Slag Based on Sequential Mineral Transformation

High‐Entropy Fluorite Oxide‐Modified CaO‐Based Sorbent Pellets for Enhanced High‐Temperature CO₂ Capture

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Facile, time-saving cigarette butt-assisted combustion synthesis of modified CaO-based sorbents for high-temperature CO2 capture

Cited by 17 publications

References 67 publications

Upcycling of the Used Cigarette Butt Filters through Pyrolysis Process: Detailed Kinetic Mechanism with Bio-Char Characterization

Upcycling of the Used Cigarette Butt Filters through Pyrolysis Process: Detailed Kinetic Mechanism with Bio-Char Characterization

An Innovative Approach to Prepare Calcium Oxide from Calcium Carbide Slag Based on Sequential Mineral Transformation

High‐Entropy Fluorite Oxide‐Modified CaO‐Based Sorbent Pellets for Enhanced High‐Temperature CO2 Capture

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Product

Resources

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High‐Entropy Fluorite Oxide‐Modified CaO‐Based Sorbent Pellets for Enhanced High‐Temperature CO₂ Capture