CO2 adsorption-desorption in batch and continuous conditions by using a nano-fibrous polyacrylonitrile radiation grafted adsorbent under response surface methodology

Imanian, Zahra; Tourzani, Ali Ahmadizadeh; Asadollahzadeh, Mehdi; Hormozi, Faramarz; Torab‐Mostaedi, Meisam; Torkaman, Rezvan; Hosseini, Majid

doi:10.1016/j.jcou.2023.102506

Cited by 9 publications

(1 citation statement)

References 59 publications

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“…Radiation, plasma, light, and chemicals are examples of excitation sources for the graft polymerization process that produces radicals on polymer substrates. A high density of electron beams or gamma rays may create a lot of radicals in polymers of different components and shapes, radiation-induced graft polymerization is better than other grafting approaches when employing these sources 29 , 30 . Ibrahim et al prepared chitosan-graft maleic acid by using gamma radiation to remove copper and nickel ions from aqueous solutions 31 , Saleh et al employed poly (chitosan-acrylamide) as an adsorbent by using gamma radiation for adsorption of copper(II) and nickel(II) from aqueous solution 32 , Also, Saleh and co-workers reported the grafting of the maleic acid and acrylamide onto chitosan by using gamma radiation for removing Co(II) from aqueous solutions 33 .…”

Section: Introductionmentioning

confidence: 99%

Targeted elimination of molybdenum ions from a leaching solution with the ability of radiated grafting GMA-PAN nanofibers

Fayazi,

Outokesh,

Asadollahzadeh

et al. 2024

Sci Rep

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In this study, electrospun polyacrylonitrile nanofibers were effectively functionalized for enhanced molybdenum ion adsorption through a multi-step approach. Initially, glycidyl methacrylate was grafted onto the nanofibers via irradiation-induced grafting polymerization, followed by chemical modification with various amino groups, with triethylamine identified as the optimal modifier. The impacts of key synthesis parameters and reaction conditions on grafting level and adsorption capacity were thoroughly investigated, with a focus on achieving maximum efficiency. The resulting nanofibers were characterized using FTIR, SEM, and BET techniques, confirming the successful modification and structural features conducive to adsorption. Furthermore, a comprehensive experimental design, incorporating a central composite design, yielded optimal conditions for molybdenum adsorption, with key parameters including monomer concentration, irradiation dose, adsorbent mass, initial concentration, time, pH, temperature, and amine concentration. The adsorption kinetics were effectively described by the pseudo-second-order model, while the Langmuir isotherm model provided valuable insight into the adsorption behavior. Impressively, the adsorbent exhibited exceptional adsorption efficiency, surpassing 98% even after six adsorption–desorption cycles using 0.5 M HCl. Thermodynamic analysis revealed the exothermic nature of the adsorption process, along with decreased entropy and overall spontaneity, underlining the favorable conditions for molybdenum adsorption. Notably, the synthesized adsorbent demonstrated notable selectivity for molybdenum and achieved an impressive adsorption capacity of 109.79 mg/g, highlighting its potential for practical applications in molybdenum removal from aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Targeted elimination of molybdenum ions from a leaching solution with the ability of radiated grafting GMA-PAN nanofibers

Fayazi,

Outokesh,

Asadollahzadeh

et al. 2024

Sci Rep

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Solar Energy‐Driven Reverse Water Gas Shift Reaction: Photothermal Effect, Photoelectric Activation and Selectivity Regulation

Yu,

Muhetaer,

et al. 2024

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Excessive carbon dioxide (CO2) emissions are one of the main causes of the greenhouse effect. Thermal catalytic reverse water gas shift (RWGS) reaction, which is a pre reaction for Fischer–Tropsch synthesis, is considered an effective way to convert CO2 and synthesize high value‐added chemicals in industry. However, traditional thermal catalysis requires a large amount of fossil fuels to drive reactions, which cannot achieve the true goal of carbon neutrality. Photothermal catalysis, as a novel conversion pathway, can achieve efficient CO2 conversion while significantly improving solar energy utilization. This review provides a detailed introduction of CO2 and H2 adsorption/activation and reaction pathways in thermal catalysis, as well as the catalytic mechanisms of thermal and chemical effects in photothermal catalytic RWGS to supply readers valuable insights on the mechanism of photothermal catalytic RWGS reaction and provide a reference for better catalyst design.

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Kinetics and Mechanism Study of Different Types of Surface‐Imprinted Polymers for CO₂ Adsorption

Ishak,

Mohamed Nasir,

Ibrahim

et al. 2024

Environmental Quality Mgmt

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The increased level of CO2 in the atmosphere has led to global warming and climate change. To mitigate these problems, solid adsorbents have become attractive materials for capturing excess CO2 in the post‐combustion method. Molecularly imprinted polymer (MIP) can be applied to prepare highly selective adsorbents that could capture CO2 molecules. The MIP was prepared using the surface imprinted polymer technique in this preliminary work. Only two types of support materials were used (graphite and silica gel) to screen the best support material that could enhance the CO2 adsorption capacity of the resulting adsorbent, which was analyzed using a fixed‐bed column reactor. Graphite‐imprinted polymer (GMIP) was found to be a good potential for CO2 adsorption. The Avrami model best described the adsorption system, while the fixed‐bed curve data fit the Yoon–Nelson model well. The semi‐empirical method was used to assess the interaction mechanism of the molecularly imprinted polymer with CO2 during adsorption. This investigation involved testing four different ratios of the template complex to functional monomers. The ratio of 1:4 (CO2:Allylthiourea) demonstrated the highest binding energy, with a higher formation of hydrogen bonds. Film diffusion and intraparticle diffusion were the main rate‐limiting steps that played vital roles at different stages of CO2 adsorption. This preliminary work has enhanced the development of MIP for CO2 adsorption and showcased the integration of computational approaches in tailoring specific MIPs.

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CO2 adsorption-desorption in batch and continuous conditions by using a nano-fibrous polyacrylonitrile radiation grafted adsorbent under response surface methodology

Cited by 9 publications

References 59 publications

Targeted elimination of molybdenum ions from a leaching solution with the ability of radiated grafting GMA-PAN nanofibers

Targeted elimination of molybdenum ions from a leaching solution with the ability of radiated grafting GMA-PAN nanofibers

Solar Energy‐Driven Reverse Water Gas Shift Reaction: Photothermal Effect, Photoelectric Activation and Selectivity Regulation

Kinetics and Mechanism Study of Different Types of Surface‐Imprinted Polymers for CO₂ Adsorption

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CO2 adsorption-desorption in batch and continuous conditions by using a nano-fibrous polyacrylonitrile radiation grafted adsorbent under response surface methodology

Cited by 9 publications

References 59 publications

Targeted elimination of molybdenum ions from a leaching solution with the ability of radiated grafting GMA-PAN nanofibers

Targeted elimination of molybdenum ions from a leaching solution with the ability of radiated grafting GMA-PAN nanofibers

Solar Energy‐Driven Reverse Water Gas Shift Reaction: Photothermal Effect, Photoelectric Activation and Selectivity Regulation

Kinetics and Mechanism Study of Different Types of Surface‐Imprinted Polymers for CO2 Adsorption

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Kinetics and Mechanism Study of Different Types of Surface‐Imprinted Polymers for CO₂ Adsorption