Characterization of calcium oxide prepared by hydration-dehydration method

Characterization of calcium oxide prepared by hydration-dehydration method

Calcium oxide, CaO is an important inorganic catalyst, used in toxic waste remediation agent and adsorbent. In this study, CaO was prepared by hydrationdehydration method using commercial calcium oxide as starting material, converted into its hydroxide by sonicating it in ultrasonic water bath for o...

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Main Author: Wahab, Nuruhuda
Format: Thesis
Published: 2010
Subjects:
Q Science (General)
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spelling my-utm-ep.163092017-08-03T07:26:28Z Characterization of calcium oxide prepared by hydration-dehydration method 2010 Wahab, Nuruhuda Q Science (General) Calcium oxide, CaO is an important inorganic catalyst, used in toxic waste remediation agent and adsorbent. In this study, CaO was prepared by hydrationdehydration method using commercial calcium oxide as starting material, converted into its hydroxide by sonicating it in ultrasonic water bath for one hour, then, undergone dehydration step by heating under high vacuum at different temperatures which were 200, 300, 400, 500, 600, 700 and 800oC respectively. The prepared samples were characterized using several techniques including Thermal Gravimetry Analysis (TGA), Fourier Transform Infrared (FT-IR), X-Ray Diffraction (XRD), Nitrogen Gas Adsorption (NA) and Field Emission Scanning Electron Microscope (FESEM). The FT-IR shows that the elimination of hydroxide and carbonate species increased with the increasing calcination temperature. By XRD, the prepared CaO- 700 shows the smallest particle size which is 27.93 nm compared to commercial CaO with particle size of 37.14 nm. The basicity study of the prepared CaO carried out using back titration method showed that the prepared CaO-800 was found to be very high basic which is 1.78 mmol/g. The result obtained using Electron Spin Resonance spectroscopy to the CaO-800 irradiation by UV in H2, showed that the cavity of CaO-800 was too large to trap electrons, containing several impurities such as manganese, Mn2+ that might inhibit the formation of trapped electron in CaO. 2010 Thesis http://eprints.utm.my/id/eprint/16309/ masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
topic Q Science (General)
spellingShingle Q Science (General)
Wahab, Nuruhuda
Characterization of calcium oxide prepared by hydration-dehydration method
description Calcium oxide, CaO is an important inorganic catalyst, used in toxic waste remediation agent and adsorbent. In this study, CaO was prepared by hydrationdehydration method using commercial calcium oxide as starting material, converted into its hydroxide by sonicating it in ultrasonic water bath for one hour, then, undergone dehydration step by heating under high vacuum at different temperatures which were 200, 300, 400, 500, 600, 700 and 800oC respectively. The prepared samples were characterized using several techniques including Thermal Gravimetry Analysis (TGA), Fourier Transform Infrared (FT-IR), X-Ray Diffraction (XRD), Nitrogen Gas Adsorption (NA) and Field Emission Scanning Electron Microscope (FESEM). The FT-IR shows that the elimination of hydroxide and carbonate species increased with the increasing calcination temperature. By XRD, the prepared CaO- 700 shows the smallest particle size which is 27.93 nm compared to commercial CaO with particle size of 37.14 nm. The basicity study of the prepared CaO carried out using back titration method showed that the prepared CaO-800 was found to be very high basic which is 1.78 mmol/g. The result obtained using Electron Spin Resonance spectroscopy to the CaO-800 irradiation by UV in H2, showed that the cavity of CaO-800 was too large to trap electrons, containing several impurities such as manganese, Mn2+ that might inhibit the formation of trapped electron in CaO.
format Thesis
qualification_level Master's degree
author Wahab, Nuruhuda
author_facet Wahab, Nuruhuda
author_sort Wahab, Nuruhuda
title Characterization of calcium oxide prepared by hydration-dehydration method
title_short Characterization of calcium oxide prepared by hydration-dehydration method
title_full Characterization of calcium oxide prepared by hydration-dehydration method
title_fullStr Characterization of calcium oxide prepared by hydration-dehydration method
title_full_unstemmed Characterization of calcium oxide prepared by hydration-dehydration method
title_sort characterization of calcium oxide prepared by hydration-dehydration method
granting_institution Universiti Teknologi Malaysia, Faculty of Science
granting_department Faculty of Science
publishDate 2010
_version_ 1747815012260380672

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