Deep eutectic solvents formed by novel metal-based amino acid salt and dihydric alcohol for highly efficient capture of CO2

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(3), С. 112533 - 112533

Опубликована: Март 19, 2024

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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Kinetic and Morphological Investigations on the Effect of Hydrophobic and Hydrophilic Amino Acids during Hydrate Based Gas Separation of CH₄─CO₂ (Biogas)

Industrial & Engineering Chemistry Research, Год журнала: 2024, Номер 63(34), С. 15208 - 15224

Опубликована: Авг. 14, 2024

Biogas has been playing a pivotal role in energy transition, and its production increasing globally. Upgradation of biogas is essential for enriching the calorific value biogas. For purpose separating out CO2 from producing purified CH4, hydrate based technology proposed. In present study, we examine first time kinetics formation employing 50–50 mol % mixture CH4–CO2 presence amino acid additives at selected concentrations operating conditions (T P). Kinetic parameters gas separation like recovery CO2, factor, uptake, t90, residual composition have studied. Concentrations acids driving force were varied to study their effect on formation, enabling identification optimal process achieve higher factor alongside improved uptake. Three hydrophobic (l-methionine, L-tryptophan, l-phenylalanine) two hydrophilic (arginine histidine) 0.1 0.5 wt chosen see along with under comparable temperature pressure conditions. It was seen that act as efficient enhancing rate yet result poor efficiency. On other hand, showcase efficiency but reduced uptake/gas 274.2 K 6.9 MPa/4.9 MPa. The highest 8.24 ± 0.37 achieved using l-arginine 3 MPa force. Further, morphological observations during different performed experimental presented.

Язык: Английский

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Growth Kinetics and Porous Structure of Surfactant-Promoted Gas Hydrate

ACS Omega, Год журнала: 2024, Номер 9(29), С. 31842 - 31854

Опубликована: Июль 12, 2024

Surfactants present in tiny amounts the aqueous phase are known to be efficient gas hydrate promoters; yet, promotion mechanisms still not fully understood. Understanding and directing those is key implementation of gas-hydrate-based applications such as storage separation, secondary refrigeration or water treatment, desalination. In this work, growth at water/gas interface porous structure surfactant-promoted methane observed by optical microscopy Raman imaging glass capillaries used cells. Hollow crystals continuously generated expelled from methane/water meniscus into surfactant solution, where they ultimately form skeleton a medium filled with solution. Unprecedented information gathered over range scales molecular scale (crystal cage filling) mesoscale morphologies, habits pore sizes) macroscale (rates converted porosity). Following an early steady-state regime, sudden order-of-magnitude increase conversion rate occurs, which related gaseous microbubbles being directly incorporated across solution later hydrate. An assessment comparison made performance two common anionic surfactants promoters, SDS (sodium dodecyl sulfate) AOT (dioctylsulfosuccinate sodium AerosolOcTyl). provides quicker but more limited than SDS, suggesting that it appropriate for continuous flow processes while better suited applications. spectra reveal filling I affected surfactants.

Язык: Английский

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Hydrate-based gas separation (HBGS) technology review: Status, challenges and way forward

Gas Science and Engineering, Год журнала: 2024, Номер unknown, С. 205465 - 205465

Опубликована: Сен. 1, 2024

Язык: Английский

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Development of metal-organic framework-based systems for H2S removal: A comprehensive review

Coordination Chemistry Reviews, Год журнала: 2025, Номер 529, С. 216466 - 216466

Опубликована: Янв. 19, 2025

Язык: Английский

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Morphology, Growth Kinetics, and Porous Structure of Surfactant-Promoted Gas Hydrates: Roles of Subcooling and Surfactant Formulation

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Март 2, 2025

Transmission microscopy and microRaman imaging are used to investigate the morphologies, growth process, porous structure of methane hydrate promoted by two prototypical surfactants, sodium dodecyl sulfate (SDS) dioctyl sulfosuccinate salt (AOT). Large ranges surfactant concentrations subcooling considered from 100 1500 ppmw 1 10 K. Gas hydrates generated on guest/water interface as hollow crystallites. These crystallites expand into aqueous phase their (open) basis until they detach it form a slurry ultimately structure, whose pores filled with phase. The morphologies rates those (porosity pore sizes) medium characterized function formulation. Under low (≈1 K), cylinders, diameters decrease increasing concentration. low-to-moderate (from 2 4 spikes or cones, growing at rate that increases subcooling. high (>4 tiny (micronic submicronic) massively produced interface. porosity sizes resulting subcooling, down values in range 40–50% few microns for highest investigated (≈10 K). Rather than altering kinetics formation, prevents aggregation an impermeable crust and/or rear interface, thus allowing back-flow water continuous production In other words, ensures flowability its removal away phenomena primarily driven interfacial properties water/gas/hydrate system.

Язык: Английский

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Biogas-Dioxolane-Mixed Hydrates: Evaluation of Kinetic Performance Coupled with Separation Study

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Март 31, 2025

Язык: Английский

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Deep eutectic solvent pre-treatment of residual biomass streams – Effects on anaerobic degradability

Renewable Energy, Год журнала: 2025, Номер unknown, С. 123215 - 123215

Опубликована: Апрель 1, 2025

Язык: Английский

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Electrochemical recovery of nutrients from human urine coupled with biogas upgrading

Bioresource Technology, Год журнала: 2024, Номер 394, С. 130298 - 130298

Опубликована: Янв. 4, 2024

Язык: Английский

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