SO.sub.2 Capture-coal combustion
First Claim
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1. In a process for the combustion of coal wherein a particulate coal is combusted with an oxygen-containing gas in the presence of a particulate calcium-containing material, the improvement comprising increasing the capture efficiency of the calcium-containing material by carrying out the combustion in the presence of an effective amount of a tin-containing material.
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Abstract
Process for the combustion of particulate coal wherein the coal is combusted with an oxygen-containing gas in the presence of a particulate calcium-containing material, the process being also carried out in the presence of a tin (Sn)-containing material.
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Citations
16 Claims
- 1. In a process for the combustion of coal wherein a particulate coal is combusted with an oxygen-containing gas in the presence of a particulate calcium-containing material, the improvement comprising increasing the capture efficiency of the calcium-containing material by carrying out the combustion in the presence of an effective amount of a tin-containing material.
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6. A process for increasing the capture efficiency of a particulate calcium-containing material during the combustion of coal comprising carrying out said combustion in the presence of said calcium-containing material and in the presence of an effective amount of a tin-containing material.
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7. A process comprising burning particulate coal in the presence of a particulate calcium-containing material and an additive mixture comprising a tin-containing material and Cr2 O3, the mol ratio of tin-containing material to Cr2 O3 being from 0.2 to 1:
- 1, and the additive mixture being present in an amount sufficient to improve the capture efficiency of the calcium-containing material.
- View Dependent Claims (8, 9, 10, 11)
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12. In a process for the combustion of coal wherein a particulate coal is combusted with an oxygen-containing gas in the presence of a particulate calcium-containing material, the improvement comprising carrying out the combustion in the presence of an additive mixture comprising SnO, Cr2 O3, and BaO, the ratio of SnO:
- Cr2 O3 ;
BaO being from 0.2 to 1;
1;
0.05 to 0.3, and the additive mixture being present in an amount sufficient to improve the capture efficiency of the calcium-containing material.
- Cr2 O3 ;
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13. A process comprising burning particulate coal in the presence of a particulate calcium-containing material and an additive mixture comprising SnO, Cr2 O3, and BaO, the ratio of SnO:
- Cr2 O3 ;
BaO being from 0.2 to 1;
1;
0.5 to 0.3, and the additive mixture being present in an amount sufficient to improve the capture efficiency of the calcium-containing material. - View Dependent Claims (14, 15, 16)
- Cr2 O3 ;
Specification