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Journal of Applied Sciences
  Year: 2011 | Volume: 11 | Issue: 21 | Page No.: 3659-3662
DOI: 10.3923/jas.2011.3659.3662
 
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Utilization of Waste Eggshells as Humidity Adsorbent
P. Pongtonglor, E. Hoonnivathana, P. Limsuwan, S. Limsuwan and K. Naemchanthara

Abstract:
The chicken and duck eggshell powders were prepared and heated at 1300°C for 4 h. The samples were analyzed by X-Ray Diffraction (XRD). It was found that Calcium Carbonate (CaCO3) from chicken and duck eggshells completely transformed into Calcium Oxide (CaO). Then the samples were placed in a box installed with a hygro-thermometer for humidity adsorption test in the range of 20-75% RH at 25°C. Hydration rate for duck and chicken eggshells were 0.0625% RH min-1 (within 880 min) and 0.0482% RH min-1 (within 1140 min) respectively. The results show that CaO from the duck eggshells is a better adsorbent than that of chicken eggshells. Furthermore, after humidity adsorption, CaO obtained from both eggshells were partly transformed into portlandite (Ca(OH)2 was confirmed by the Rietveld refinement method and Scanning Electron Microscope (SEM).
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How to cite this article:

P. Pongtonglor, E. Hoonnivathana, P. Limsuwan, S. Limsuwan and K. Naemchanthara, 2011. Utilization of Waste Eggshells as Humidity Adsorbent. Journal of Applied Sciences, 11: 3659-3662.

DOI: 10.3923/jas.2011.3659.3662

URL: https://scialert.net/abstract/?doi=jas.2011.3659.3662

 
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