Influence of natural mineral sulfur-fixed agent on combustion of powder coal
- Received Date: 03/12/2008
- Accepted Date: 03/11/2008
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Key words:
- sulfur-fixed agent /
- vermiculite /
- combustion characteristic /
- kinetics
Abstract: Ca(OH)2 and CaCO3 were selected as the main sulfur-fixed agent, their mass ratio is 2∶3. Vermiculite and Na2CO3 were selected as the additives. The influence on the desulphurization ratio by the addition of main sulfur-fixed agent and additives were studied under Ca/S=2.25. Result shows that the desulphurization ratio of powder coal with the addition of sulfur-fixed agent can achieve 85% at 950℃ and burning half an hour. TG experiment was carried on the coal with different sulfur-fixed agents, their effects on the coal combustion characteristic and kinetic parameters were analyzed. Conclusion draws that the addition of main sulfur-fixed agent and additives not only enhanced the desulphurization ratio, but also promoted coal combustion and reduced the amount of coal ash.
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