Green Bio-Based CaO from Guinea Fowl Eggshells

Pedavoah, Mary-Magdalene; Badu, Mercy; Boadi, Nathaniel Owusu; Awudza, Johannes A. M.

doi:10.4236/gsc.2018.82015

Cited by 10 publications

(3 citation statements)

References 30 publications

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“…Referring to Fig. 1, a minor weight loss (~5 wt.%) at temperature of < 300°C is attributed to the loss of moisture and volatile organic substance, while a significant decomposition (~40 wt.%) at the temperature of >650°C is attributed to the CaCO3 conversion to CaO [11][12][13]. Salauddeen et al [14] reported that the CO2 release is taken from the point where a significant weight loss is observed till the end of analysis.…”

Section: Resultsmentioning

confidence: 99%

Preliminary study of carbon dioxide (CO2) adsorption using chicken eggshell

2023

Sustainable Processes and Clean Energy Transition

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Abstract. Carbon dioxide (CO2) emission is a major concern nowadays due to its contribution to global warming scenarios. Therefore, valorization of inexpensive and green material to adsorb the CO2 prior to emission has been emphasized. In this research study, calcined chicken eggshell waste had been tested as a potential CO2 adsorbent. Specifically, calcined eggshell at 700°C, 800°C, and 900°C has been used in subsequent carbonation reaction at 650°C for 1 hr. The result shows that increasing the calcination temperature improves the eggshell decomposition (weight loss) and CO2 adsorption capacity (weight gain). Specifically, the weight gain by the calcined eggshell at 900°C is roughly 61 wt.%. Both pristine and calcined eggshells are characterized by the Fourier-Transform Infrared Spectroscopy (FTIR), thermogravimetric analysis (TGA), Scanning Electron Microscopy (SEM), and N2 physisorption. Overall, utilization of the chicken eggshell waste is indeed promising as this can contribute to both environmental and economic advantages.

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Section: Resultsmentioning

confidence: 99%

Preliminary study of carbon dioxide (CO2) adsorption using chicken eggshell

2023

Sustainable Processes and Clean Energy Transition

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“…8 (continued) potentially increase the environmental impact. This could be mitigated by using lime from waste sources, for instance carbide lime [54] or eggshells [55].…”

Section: Discussionmentioning

confidence: 99%

A Study of Innovative Alkali-Activated Binders for Soil Stabilisation in the Context of Engineering Sustainability and Circular Economy

et al. 2021

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In the context of sustainability in the civil engineering industry, chemical ground improvement is becoming increasingly used, as a generally more sustainable alternative to replacing and landfilling unsuitable for construction ground. However, traditional soil stabilisers such as Portland cement or lime are not environmentally impact-free; international research effort is thus focusing on the development of innovative cementing agents. This paper presents results from a feasibility study on the development of suitable alkali-activated slag cements for the stabilisation of two soils. A number of alkali-activators were considered, comprising potassium hydroxide, a range of alkali salts, as well as a material retrieved from waste (Paper Sludge Ash, PSA) which contains free lime. Indicative results of an extensive parametric study in terms of unconfined compressive strength (UCS) are shown, followed by results of ongoing oedometer tests to determine soil compressibility and some preliminary tests on selected soil/binder mixes to observe the durability to wetting-drying cycles. Overall, all alkali-activated cement mixes increased the UCS and stiffness of the soil. Carbonates and Na2SiO3 used on their own gave lower strength increases. The highest strengths were achieved from AAC with KOH and Ca(OH)2 from PSA, which showed similar strength gain. The latter material has shown consistently a lot of promise in terms of strength, stiffness and volumetric stability of the soil as well as treatment durability. Ongoing research focuses on further mix optimisation and a comprehensive mechanical and durability property testing supported by material analysis (mineralogical, chemical and microstructural) to gain a better understanding of the complex mechanisms involved.

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“…Internationally, about 250,000 tons of eggshell waste is released annually (Faridi and Arabhosseini 2018). Waste egg shells are among useful agricultural biowaste materials that have the following properties; they are biodegradable, recyclable and biocompatible (Pedavoah et al, 2018). Egg shells are mainly composed of calcium carbonate (CaCO3), which accounts for about 93.6% by weight, followed by calcium triphosphate (0.8%), which accounts for about 10% of a hen's egg (Neunzehn, Szuwart, and Wiesmann 2015).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Eggshells Nanocatalyst: Synthesized by Bottom-Up Technology

Ogur²,

Mbatia³

et al. 2022

Walisongo J. Chem.

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The sol-gel technique was used to prepare the nanocatalyst from waste egg shells for the production of yellow oleander biodiesel. In this study, the physicochemical and catalytic properties of the nanocatalysts were investigated using: X-ray fluorescence spectrometry (XRF), transmission electron microscopy (TEM), the Barrett-Joyner-Halenda (BJH) model to quantify the pore structure of the samples, and Brunauer-Emmett-Teller (BET) to calculate the exact surface area were the techniques used. The results of the EDX, and XRF analysis showed that the synthesized nanocatalyst was majorly CaO. At 90.46 ± 1.73%, this was higher than the control for incinerated eggshells. From TEM images the particles were spherical in shape with particle sizes ranging from ≈ 7 to 41 nm. BET analysis results indicated that the nanocatalyst was mesoporous with surface area, average pore diameter, and pore volume was; 5.54 ± 0.48 m2/g, 18.57 ± 2.16 nm, and ≈ 0.016 ± 0.0 – 0.017 ± 0.0 cm³/g, respectively. The surface area to volume ratios were 3.27 ± 108 m-1, 2.52 ± 108, and 1.95 ± 108 m-1, respectively. Incinerated eggshells highest followed the synthesized nanocatalyst and CaO, respectively. The synthesized eggshell nanocatalyst was found to be a potential nanocatalyst.

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Green Bio-Based CaO from Guinea Fowl Eggshells

Cited by 10 publications

References 30 publications

Preliminary study of carbon dioxide (CO2) adsorption using chicken eggshell

Preliminary study of carbon dioxide (CO2) adsorption using chicken eggshell

A Study of Innovative Alkali-Activated Binders for Soil Stabilisation in the Context of Engineering Sustainability and Circular Economy

Characterization of Eggshells Nanocatalyst: Synthesized by Bottom-Up Technology

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