| 添加剂对氧化钙固硫促进作用的机理探讨 |
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| 引用本文： | 武增华,许玲,陈昌和.添加剂对氧化钙固硫促进作用的机理探讨[J].煤炭转化,2000,23(3):72-76. |
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| 作者姓名： | 武增华 许玲 陈昌和 |
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| 作者单位： | 1. 清华大学化学系,100084,北京
2. 清华大学热能系,100084,北京 |
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| 基金项目： | 国家重点基础研究发展规划项目!( G19990 2 2 2 0 5 1)，清华大学基础研究基金!( JC19990 5 2 ) |
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| 摘 要： | 探讨了添加剂对石灰石固硫促进作用的机理，添加剂改变了ＣａＯ的孔结构，孔分布和表面性质，添加剂在一定程度上催化了ＣａＯ与ＳＯ２的表面化学反应；由于添加剂所加离子的掺杂，引起固硫产物层晶格的缺陷，大大提高了产物层扩散系数；添加剂的加入，改变了钙基固硫剂中钙的化学形式。生成熟的含钙化合物，它们与ＳＯ２反应活性更高，或形成了高温下更稳定的多元化合物，添加剂及其燃烧的条件可以改变固硫最终产物。
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| 关 键 词： | 固硫 助剂 氧化钙 固硫剂 煤燃烧 |
| 修稿时间： | 2000-03-02 |
MECHANISM OF ADDITIVES ON CaO SULFATION |
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| Wu Zenghua,Xu Ling,Chen Changhe.MECHANISM OF ADDITIVES ON CaO SULFATION[J].Coal Conversion,2000,23(3):72-76. |
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| Authors: | Wu Zenghua Xu Ling Chen Changhe |
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| Abstract: | The mechanics of the promotion of additives were discussed in this work: additives can change the surface properties and pore characteristics of CaO; additives have catalytic effect on the surface chemical reaction of CaO with SO 2; Ions of additives cause the lattice defects in the crystal of sulfation product layer, that dramatically promote the product layer diffusivity; Some new compounds of calcium can be produced when additives are added to limestone or CaO, these new compounds are more active than CaO to react with SO 2; The oxidation of CaS and the decomposition of CaSO 4 can be reduced by vitreous matter produced from additives, especially at high temperature. |
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| Keywords: | CaO (limestone) sulfur retention additive |
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