Oxidation of aqueous sulphur dioxide in suspensions of magnesium oxide: Removal of SO<sub>2</sub> from flue gases
IR@NISCAIR: CSIR-NISCAIR, New Delhi - ONLINE PERIODICALS REPOSITORY (NOPR)
View Archive Info| Field | Value | |
| Title |
Oxidation of aqueous sulphur dioxide in suspensions of magnesium oxide: Removal of SO<sub>2</sub> from flue gases
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| Creator |
Bhargava, Rachna
Rani, Ashu Gupta, K S |
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| Description |
713-716
The kinetics of oxidation of aqueous SO<sub>2</sub> in acetate buffered suspensions of MgO obeys rate law (i)<br> R<sub>obs</sub> = <em>k</em>[MgO][S(IV)]<sup>2</sup>[H<sup>+</sup>]<sup>-l</sup> ... (i)<br> and the main oxidation product is sulphate. The suggested mechanism involves the formation of surficial complexes between hydroxylated magnesium and S(IV). There exists a close parallelism between R<sub>obs</sub> and <em>p</em>H of zero point charge, <em>p</em>H<sub>zpc</sub><em>, </em> for CdO, MgO and SiO<sub>2</sub>. The results suggest that in wet-scrubbers, which utilize the slurries of MgO for removal of SO<sub>2</sub> from the flue gases, the sulphite formed as a result of SO<sub>2</sub> absorption will be oxidized by atmospheric oxygen to sulphate, the extent of which will increase with increase in <em>p</em>H<em>, </em> temperature, slurry density and absorbed SO<sub>2</sub>. |
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| Date |
2018-03-20T10:18:55Z
2018-03-20T10:18:55Z 1993-08 |
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| Type |
Article
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| Identifier |
0975-0975(Online); 0376-4710(Print)
http://nopr.niscair.res.in/handle/123456789/43943 |
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| Language |
en_US
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| Rights |
<img src='http://nopr.niscair.res.in/image/cc-license-sml.png'> <a href='http://creativecommons.org/licenses/by-nc-nd/2.5/in' target='_blank'>CC Attribution-Noncommercial-No Derivative Works 2.5 India</a>
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| Publisher |
NISCAIR-CSIR, India
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| Source |
IJC-A Vol.32A(08) [August 1993]
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