Synthesis and characterization of KOH@Graphene oxide-Fe3O4 as a magnetic composite adsorbent for CO2 capture

Helmi, Maryam; Moazami, Farzad; Hemmati, Alireza; Ghaemi, Ahad

doi:10.1016/j.jpcs.2023.111338

Cited by 6 publications

(1 citation statement)

References 65 publications

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“…CO 2 adsorption is a viable method due to its high regenerative potential and low energy requirements 11 . Some materials used in CO 2 adsorption such as carbon-based material 12 – 14 , silica 15 , 16 , zeolites 17 , Metal Organic Frameworks (MOFs) 18 , and metal oxides 19 . Among these materials, carbon-based porous materials such as activated carbon (AC) are widely used to CO 2 adsorption 20 – 22 .…”

Section: Introductionmentioning

confidence: 99%

Experimental, RSM modelling, and DFT simulation of CO2 adsorption on Modified activated carbon with LiOH

Ahmadi,

Bahmanzadegan,

Qasemnazhand

et al. 2024

Sci Rep

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This research investigates the enhancement of CO2 adsorption capacity through the use of modified activated carbon (AC) with LiOH, focusing on operational conditions and adsorbent properties. Response Surface Methodology (RSM) is employed to optimize process parameters for maximizing CO2 adsorption capacity. The study considers temperature, pressure, LiOH concentration for modification, and adsorbent weight as independent variables across five levels. Analysis of Variance reveals that LiOH concentration, adsorbent quantity, pressure, and temperature significantly influence CO2 adsorption. Optimal values for temperature (30°C), pressure (9 bar), LiOH concentration (0.5 mol/L), and adsorbent weight (0.5 g) result in a maximal CO2 adsorption capacity of 154.90 mg/g. Equilibrium adsorption capacity is utilized for modeling, with the Freundlich model proving suitable for CO2 adsorption on LiOH-AC. Kinetic modeling indicates the second-order model's suitability for temperatures of 30 °C and 50 °C, while the Elovich model fits temperatures of 70 °C and 90 °C. Thermodynamic modeling at the optimized conditions (303 K and 6 bar) yields ∆H, ∆S, and ∆G values of adsorption as 12.258 kJ/mol, − 0.017 kJ/mol·K, and − 7.031 kJ/mol, respectively. Furthermore, structural considerations of AC are discussed alongside modeling and simulation, presenting the adsorption rate of CO2 and the binding energy index based on Density Functional Theory (DFT).

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Section: Introductionmentioning

confidence: 99%

Experimental, RSM modelling, and DFT simulation of CO2 adsorption on Modified activated carbon with LiOH

Ahmadi,

Bahmanzadegan,

Qasemnazhand

et al. 2024

Sci Rep

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Photosynthesis Characterization of Mutant Algae and Enhanced Carbon Fixation of Algae–Bacteria Symbiosis Treating Municipal Wastewater

Zhao,

Liu,

Wang

et al. 2024

Fuel Cells

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Algae–bacteria symbiosis (ABS) as a sustainable wastewater treatment process has drawn mounting attention. However, nontrivial CO2 emissions were still present in municipal wastewater treatment due to the inadequate carbon fixation efficiency of microalgae under low carbon level. The obtained UV‐induced mutant Chlorella vulgaris MIHL4 performed higher carbon fixation capability (14.5%) and biomass productivity (25.3%) with improved photosynthetic fluorescence parameters and enzyme activities compared to wild‐type C. vulgaris. Transcriptome analyses showed pathways related to the carbon fixation and carbon catabolism were significantly up‐regulated in MIHL4. Compared with ABS inoculated with wild‐type C. vulgaris, CO2 emissions were significantly reduced by 32.1%–38.3% in ABS inoculated with MIHL4, where the biomass growth, metabolic activity, and sludge granulation were enhanced. Chlorella responsible for carbon fixation was the dominant population (19.3%) in ABS inoculated with MIHL4, in which the abundance of functional microbes and genes associated with photosynthesis as well as nutrient removal increased.

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Amine grafting of carbazole-based hypercrosslinked polymer as an adsorbent to enhance CO2 capture

Torkashvand,

Moradi,

Ghaemi

2023

Case Studies in Chemical and Environmental Engineering

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Synthesis and characterization of KOH@Graphene oxide-Fe3O4 as a magnetic composite adsorbent for CO2 capture

Cited by 6 publications

References 65 publications

Experimental, RSM modelling, and DFT simulation of CO2 adsorption on Modified activated carbon with LiOH

Experimental, RSM modelling, and DFT simulation of CO2 adsorption on Modified activated carbon with LiOH

Photosynthesis Characterization of Mutant Algae and Enhanced Carbon Fixation of Algae–Bacteria Symbiosis Treating Municipal Wastewater

Amine grafting of carbazole-based hypercrosslinked polymer as an adsorbent to enhance CO2 capture

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