Characterization of calcium oxide derived from waste eggshell and its application as CO2 sorbent

Witoon, Thongthai

doi:10.1016/j.ceramint.2011.05.125

Cited by 245 publications

(135 citation statements)

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“…It was due to the decomposition of organic compounds in the eggshell particles as described by Witoon. 21 The heat treatment is a process to develop the pore structure by thermal decomposition, thus indirectly affect the size of the density of the adsorbent produced as shown by the yield results in Table-1.…”

Section: Resultsmentioning

confidence: 99%

Influence of Heat Treatment on Eggshell Particles as Low Cost Adsorbent for Methylene Blue Removal From Aqueous Solution

2017

Rasayan J Chem

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The influence of heat treatment on eggshell particlesas low cost adsorbent of methylene blue had been studied. The eggshell particles were heated at variation temperatures of 150 o C, 200 o C and 300 o C. Heated eggshell particles were then used as an adsorbent for methylene blue removal from aqueous solution. The effects of contact time and pH on adsorption capacity of methylene blue were also studied. The results showed that the optimum temperature of the heat treatment was obtained at 200 o C, where the adsorption capacity was 0.197 (mg/g) and percentage of removal was 98.58%. The adsorption studies showed that optimum adsorption occurred at contact time 15 minutes and pH of 12. Adsorption of methylene blue by the heated eggshell particles fitted the Langmuir and Freundlich isotherm equations. The maximum adsorption capacity (Qmax) of methylene blue was 0.321 (mg/g).

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Section: Resultsmentioning

confidence: 99%

Influence of Heat Treatment on Eggshell Particles as Low Cost Adsorbent for Methylene Blue Removal From Aqueous Solution

2017

Rasayan J Chem

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“…As illustrated in Fig. 3(a), there is a broad transmission band at approximately 3417.48 cm -1 in raw cockle shell spectra where it can be attributed to OH stretching vibration from residual water [25]. The weak bands at 1788.08 cm -1 corresponds to C=O bonds from carbonate [25].…”

Section: Ftir Spectra Analysismentioning

confidence: 91%

“…In the OH stretching vibration region, strong peak at 3642.22 cm -1 was observed in IR spectra of synthesized CaO (refer to Fig. 3(c)) due to intensity of surface OH band increase with increasing of temperature as compared with raw cockle shell [25,29]. The two carbonate bands at ~ 700 cm -1 in aragonite were not extinction in Fig.…”

Section: Ftir Spectra Analysismentioning

confidence: 91%

“…3(a), there is a broad transmission band at approximately 3417.48 cm -1 in raw cockle shell spectra where it can be attributed to OH stretching vibration from residual water [25]. The weak bands at 1788.08 cm -1 corresponds to C=O bonds from carbonate [25]. The other functional group, represented by the smaller absorption bands in cockle shell was carboxylic acid which is at 2522.24 cm -1 [26].…”

Section: Ftir Spectra Analysismentioning

confidence: 99%

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Sorption equilibria of CO₂ on synthesized CaO in the presence of water

Azmi

Yusup

Sabil

2015

WIT Transactions on Ecology and the Environment

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Calcium-based adsorbents produced by biomass material is technically feasible, costly effective and advantageous to a certain extent in capturing CO 2 . Since the waste of a cockle shell is found to contain around 98% calcium, it can be a good source for CaCO 3 and yield CaO through the high temperature calcination process. The sorption equilibria of CO 2 on synthesized CaO with different amounts of water were measured experimentally by using a volumetric method at a temperature of 2°C. Under dry conditions, synthesized CaO has a low CO 2 uptake, as the adsorption rate of CO 2 in calcium-based sorbent is high at higher temperatures. While under wet conditions, the large increment of CO 2 adsorption was observed due to formation of CO 2 hydrates which were indicated by inflection of isotherms at a definite pressure of the S-shape. At the inflection point, the highest sorption capacity (5.07 mmol/g) was obtained at a water ratio of 0.55, which is about 30 times higher than dry samples. The trend of FTIR spectra were observed to be similar for raw cockle shells and wet CaO after CO 2 adsorption, in contrast with spectra of CaO before adsorption. The formation of CO 2 hydrate can be further verified by the changes of surface morphology of CaO, before and after adsorption. It can be concluded that calcium-based sorbent with the presence of water has the ability to be further utilized for CO 2 separation.

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“…The study conducted by Thongthai [30] indicates that egg shell calcined in a preheated furnace at 900 0 C for 3 h contains ~ 97% CaO. To prepare CaO, the egg shell was washed with deionized water, and dried in an oven at 105 0 C for 24 h. The dried egg shell was milled by hand using a mortar for calcination at 900 0 C for 3 h in a preheated furnace [31,32].…”

Section: Preparation Of Desorbent Solutionmentioning

confidence: 99%

Experimental Evaluation of Activated Termite Mound for Fluoride Adsorption

Fufa¹

2016

IOSR

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Characterization of calcium oxide derived from waste eggshell and its application as CO2 sorbent

Cited by 245 publications

References 21 publications

Influence of Heat Treatment on Eggshell Particles as Low Cost Adsorbent for Methylene Blue Removal From Aqueous Solution

Influence of Heat Treatment on Eggshell Particles as Low Cost Adsorbent for Methylene Blue Removal From Aqueous Solution

Sorption equilibria of CO₂ on synthesized CaO in the presence of water

Experimental Evaluation of Activated Termite Mound for Fluoride Adsorption

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Characterization of calcium oxide derived from waste eggshell and its application as CO2 sorbent

Cited by 245 publications

References 21 publications

Influence of Heat Treatment on Eggshell Particles as Low Cost Adsorbent for Methylene Blue Removal From Aqueous Solution

Influence of Heat Treatment on Eggshell Particles as Low Cost Adsorbent for Methylene Blue Removal From Aqueous Solution

Sorption equilibria of CO2 on synthesized CaO in the presence of water

Experimental Evaluation of Activated Termite Mound for Fluoride Adsorption

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Product

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Sorption equilibria of CO₂ on synthesized CaO in the presence of water