Advanced Materials for CO2 Capture and Storage: A Comprehensive Review of Current Progress and Future Prospects

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 115881 - 115881

Опубликована: Март 1, 2025

Язык: Английский

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Conversion of char from pyrolysis of plastic wastes into alternative activated carbons for heavy metal removal

Environmental Research, Год журнала: 2024, Номер 250, С. 118558 - 118558

Опубликована: Фев. 25, 2024

The valorization of post-consumer mixed plastics in pyrolysis processes represents an abundant reservoir carbon that can be effectively converted into useful chars. This process not only holds appeal terms improving plastic waste concerns but also contributes to the reduction greenhouse gas emissions, thus aligning with principles a circular economy paradigm. In this study, char produced from has been activated Na2CO3, KOH, NaOH, and K2CO3 improve textural, structural, composition characteristics, leading improved adsorption capability. These characteristics were studied by N2 adsorption-desorption isotherms, scanning electron microscopy, elemental immediate analysis, X-ray photoelectron spectroscopy. developed surface area (SBET) was 573, 939, 704 592 m2 g−1 for NaOH carbons, respectively. chars (ACs) tested heavy metals both synthetic waters containing Pb, Cd, Cu industrial wastewater collected at agrochemical production plant. Na2CO3-AC best performing material. metal uptake using batch set-up 40, 13 12 mg Cd Cu. Experiments column resulted saturation time 290, 16, 80 min waters, respectively, uptakes 26.8, 4.1, 7.9 g−1, effluents, mainly Cr, Cu, Mn, Zn plug-flow column. notably decreased compared water due competition effect active sites.

Язык: Английский

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Insights into using plastic waste to produce activated carbons for wastewater treatment applications: A review

Journal of Water Process Engineering, Год журнала: 2024, Номер 62, С. 105386 - 105386

Опубликована: Май 1, 2024

This review explores the potential use of plastic waste for preparation activated carbons, which can be used as adsorbent materials to remove contaminants from water. Using discarded plastics synthesize carbons has several benefits. Firstly, it helps reduce burden that ends up in landfills and oceans or dumped on roadsides. Secondly, creates a sector using treat pollutants further approaches closer circular economy scenario plastics. Polyethylene terephthalate, tire, mixtures have been polymers most studied. The superficial area derived chars varies wide range, 0.1 2152 m2/g. KOH seems widespread agent used, one leads best textural properties. In general, adsorption capacities heavy metals were lower than 300 mg/g. On average, higher kinetic rates adsorbing emerging concern (CECs) compared metals. CECs uptake 2 659 Although feasibility developing porous is currently under research with promising results successful industrial application, some flaws regarding granulometry, possible leaching, regeneration ability, costs, among others, not addressed yet.

Язык: Английский

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Promoting the circular economy: Valorization of a residue from industrial char to activated carbon with potential environmental applications as adsorbents

Journal of Environmental Management, Год журнала: 2024, Номер 356, С. 120753 - 120753

Опубликована: Март 25, 2024

Pyrolysis of residues enriched with carbon, such as in agroforestry or industrial activities, has been postulated an emerging technology to promote the production biofuels, contributing circular economy and minimizing waste. However, during pyrolysis processes a solid fraction residue is generated. This work aims study viability these chars develop porous carbonaceous materials that can be used for environmental applications. Diverse discharged by factory have activated KOH. Concretely, char came from olive stone, pine, acacia splinters, spent fuel, cellulose artificial casings. The changes textural, structural, composition characteristics after activation process were studied N2 adsorption-desorption isotherms, scanning electron microscopy, FTIR, elemental analysis, XPS. A great porosity was developed, SBET within 776–1186 m2 g−1 pore volume 0.37–0.59 cm3 70–90% micropores contribution. adsorption CO2, leading CO2 maximum uptakes 90–130 mg g−1. There good correlation between uptake microporosity oxygenated surface groups chars. Moreover, their ability contaminants aqueous solution also evaluated. there heavy metals, i.e., Cd, Cu, Ni, Pb, Zn, organic pollutants concern caffeine, diclofenac, acetaminophen.

Язык: Английский

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Review and analysis of porous adsorbents for effective CO2 capture

Renewable and Sustainable Energy Reviews, Год журнала: 2025, Номер 215, С. 115589 - 115589

Опубликована: Март 16, 2025

Язык: Английский

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Plastic Waste to Carbon Adsorbent: Activation with Sodium Carbonate and Functionalization with Citric Acid

Applied Sciences, Год журнала: 2025, Номер 15(3), С. 1634 - 1634

Опубликована: Фев. 6, 2025

Plastic waste management is currently a challenge of great importance. The valorization non-recyclable fractions into carbonaceous adsorbents an interesting strategy that promotes the circular economy. In this work, waste-to-adsorbent was pursued with char from plastic pyrolysis. (non-porous, surface area ~3 m2 g−1) activated chemical activation, sodium carbonate boosting textural properties (surface ~418 g−1, pore volume 0.436 cm3 g−1), triggering formation carbon large mesoporosity (71%). X-ray photoelectron spectroscopy and thermal programmed desorption characterization confirmed enrichment carboxylic groups by treatment citric acid, slight loss properties. showed enhanced adsorption uptake lead in water (~52 mg g−1 functionalized vs. ~37 non-functionalized) limited influence on acetaminophen. preparation costs consumption cost per unit removed pollutants confirm benefits activation functionalization original precursor. However, possible metal lixiviation additives environmental impact according to life cycle assessment still make kind controversial.

Язык: Английский

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Fixed-bed CO2 adsorption onto activated char from the pyrolysis of a non-recyclable plastic mixture from real urban residues

Journal of CO2 Utilization, Год журнала: 2023, Номер 73, С. 102517 - 102517

Опубликована: Июнь 17, 2023

The potential use of activated char obtained from the pyrolysis a mixture non-recyclable plastics for adsorption CO2 in fixed-bed columns has been explored. rejected fraction collected municipal solid treatment plant was pyrolyzed and resulting residue to develop porous carbonaceous material. dynamic behavior assessed by breakthrough curves continuous column tests. Among all available models, were successfully fitted dose-response model. effect temperature (15–45 ºC), inlet concentration (10–40 %, vol.), adsorbent length bed (loadings, 1–2 g) on efficiency process evaluated surface response methodology applying an adaptative neural fuzzy inference system (ANFIS). A rise exerted negative capacity due physisorption properties process, fed displayed positive did not play remarkable influence.

Язык: Английский

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Experimental investigation on slow thermal pyrolysis of real-world plastic wastes in a fixed bed reactor to obtain aromatic rich fuel grade liquid oil

Journal of Environmental Management, Год журнала: 2023, Номер 344, С. 118680 - 118680

Опубликована: Июль 31, 2023

Язык: Английский

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On the cutting-edge of non-recyclable plastic waste valorization: From pyrolysis char to nitrogen-enriched activated carbon for landfill biogas upgrading

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(2), С. 112265 - 112265

Опубликована: Фев. 19, 2024

The rejected fraction of post-consumer plastics collected by mechanical sorting is a source chemical recycling processes such as pyrolysis, promoting the circular economy. char residue produced in this process has been valorized, reinforcing introduction consumption chain, an adsorbent aimed at upgrading biogas stream. was activated with KOH (496 m2 g-1) and surface material enriched nitrogen groups (6% wt. XPS) to raise CO2 uptake. urea were used following different strategies, demonstrating that sequential activation modification most efficient approach. Although area decreased after N insertion, i.e. from 497 389 g-1, uptake raised. Specifically, comparing per micropore considerably improved functionalization (0.351 vs 0.235 mg m-2). selectivity not modified, but isosteric adsorption heat urea-modified sample higher than bare one. behavior dynamic tests assessed fixed-bed columns, assessing effect temperature, inlet CO2/CH4 concentration, individually mixtures. There no appreciated loss performance adsorption-desorption cycles. urea-modification two-pot synthesis proved better if compared non-modified char. This work sheds insights into feasibility plastic residues giving new added-value materials functionalized carbonaceous adsorbents, economy basis.

Язык: Английский

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Enhancing carbon capture efficiency in biogas upgrading: A comprehensive review on adsorbents and adsorption isotherms

AIP Advances, Год журнала: 2024, Номер 14(4)

Опубликована: Апрель 1, 2024

Biogas results from the anaerobic digestion of organic materials, a reliable and sustainable process that simultaneously manages waste generates renewable energy. However, presence secondary impurities, such as carbon dioxide (CO2) other gases, in raw biogas diminishes its efficacy, significantly lowering energy content restricting utility across industry sectors. Moreover, these impurities contribute to various health environmental concerns, including their role exacerbating climate change global warming. Consequently, efficient separation CO2 is essential for upgrading biogas. The interest utilizing transportation fuel or substitute natural gas has spurred advancement technologies. While methods exist upgrading, those relying on absorption stand out particularly significant. Carbon capture efficiency pertains ability method effectively separate biogas, typically composed methane (CH4) gases. This crucial producing high-quality with minimal emissions, thus promoting sustainability. Enhancing reducing greenhouse emissions cleaner production. efficacy relies adsorbents adsorption isotherms, which are integral components this process. Improving elements vital enhancing purity, ensuring suitability applications, mitigating footprint. Traditional enhance by employing adsorbents, zeolites activated carbon, well optimizing isotherms. Surface modifications adjustments parameters have also led improved selectivity over still drawbacks, poor selectivity, difficulties regeneration, scalability. These limitations draw attention necessity ongoing optimization, investigating gaining thorough grasp how capacities, kinetics, interact. Adsorbents isotherms main topics study’s analysis, examines state art increasing upgrading. It discusses conventional methods, suggests alternate customized adjustments, optimization techniques means achieving progress. suggested changes, investigation materials be used increase effectiveness capture. To guarantee consistency, study specific rules procurement, preparation, calcining eggshells. In addition, balancing CH4 adsorption, improving adsorbent composition addressing scalability, long-term stability, practical implementation challenges critical. direct future studies toward more landscape adding our understanding

Язык: Английский

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