| 生物质型煤固硫添加剂的固硫增强作用 |
| 摘要点击 1815 全文点击 2383 投稿时间：2000-11-12 修订日期：2001-04-04 |
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| 中文关键词 添加剂 生物质型煤 硫酸钙 热分解 固硫 |
| 英文关键词 additive bio mass coal briquette sulphate of calcium thermal decomposition sulfur retention |
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| 中文摘要 |
| 在管式炉中进行了生物质型煤的燃烧固硫试验,考察了Al2O3、Fe2O3和MnO2共3种添加剂对钙基固硫剂的固硫增强作用.结果表明,只有Al2O3增强了型煤的固硫作用.通过TGA试验进一步证实,在还原性气氛下Al2O3可有效地抑制固硫产物CaSO4的高温分解.XPS和XRD分析表明,Al2O3通过与CaSO4和CaO作用,形成了热稳定性高的复盐CaSO4·3CaO·3Al2O3,并包裹在CaSO4晶体的表面,从而抑制了CaSO4的分解. |
| 英文摘要 |
| The research first conducted the sulfur fixing experiment of bio mass coal briquette in a tubular furnace. The impacts of three additives Al2O3、Fe2O3 and MnO2 on the sulfur retention by calcium based sorbent in briquette were investigated, and only Al2O3 displayed the enhancement of sulfur retention. The TGA experiment was further carried out, and proved that the high temperature decomposition of CaSO4 in the deoxidization atmosphere was effectively inhibited with the addition of Al2O3. The XPS and XRD analyses of briquette ash showed that due to the interaction among Al2O3,CaSO4 and CaO, the composite CaSO4·3CaO·3Al2O3 which has more thermal stability was formed. With its wrapping or binding onto the surface of CaSO4 crystal, the decomposition of CaSO4 was mitigated. |
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