Preparation and Characterization of Calcium Silicate for CO Sorption
An attempt has been made to develop different samples of calcium silicate and to screen these samples for CO 2 sorption and alkalinity in order to achieve maximum CO 2 sorption. The CO 2 sorption capacity of these samples was examined at different temperatures. Various methods such as solid–solid fu...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publications
2012-12-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.30.10.817 |
| Summary: | An attempt has been made to develop different samples of calcium silicate and to screen these samples for CO 2 sorption and alkalinity in order to achieve maximum CO 2 sorption. The CO 2 sorption capacity of these samples was examined at different temperatures. Various methods such as solid–solid fusion, sol-gel, molten salt and templates (CTAB, cetyltrimethylammonium bromide or Aliquat 336, tricaprylmethylammonium chloride) were used to prepare the calcium silicate samples. The solid mass of calcium silicate samples were obtained by calcining the solid product obtained in an atmosphere of air or helium at 900 °C for 3 hours. The calcium silicate samples were characterized for surface area, alkalinity, scanning electron microscopic images and X-ray diffraction patterns. The temperature profile of CO 2 sorption by calcium silicate was studied in the temperature range of 40–850 °C. Our results showed that the alkalinity and surface area of calcium silicate were in the range from 2.35 to 20 mmol g −1 and 1.4 to 10 m 2 g −1 , respectively. The sorption of CO 2 at 500 °C over calcium silicate for the different Ca/Si mol ratio (range: 1–6) was found to be in the range from 3.12 to 29.96 wt%. Addition of a promoter such as sodium, potassium, caesium and lanthanum was found to enhance the sorption of CO 2 by calcium silicate. Several samples of different mol ratios of Ca/Si prepared by different methods were tested for the sorption of CO 2 at 500 °C. |
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| ISSN: | 0263-6174 2048-4038 |