摘要
利用添加剂调制改性的方法,考察了以碳酸钠为代表的金属盐对石灰石微观结构的影响,得出调制改性优化了石灰石的物理结构,并在离子比γ为15∶1的加入量效果最佳。在此基础上,借助定硫仪比较了O2 CO2气氛下调制前后石灰石对燃煤SO2释放的影响,并对燃烧产物进行灰熔点分析及灰成分的XRD测试。实验结果表明,在不影响煤粉燃烧结渣特性的前提下,改性后的石灰石可以更有效地抑制SO2的排放,固硫效果在1000℃时达到最佳。
The effect of metal salts on the physical structure of CaCO_3 was studied by using sodium carbonate as the additive and PoreMaster-60 mercury porosimeter. The investigation shows that the BET surface area and porosity increase and the pore distribution of CaCO_3 is optimized, especially, the effect is more evident as the ionic ratio of calcium to sodium is equal to fifteen. At the same time, the characteristics of SO_2 release from coal combustion in the atmosphere of O_2/CO_2 with adding CaCO_3 was compared to that with adding modified CaCO_3 by using ZCS-1 intelligent sulfur analyzer, and the ash melting point test and XRD analysis were carried out with the combustion products. The results show that without aggravating slagging, the SO_2 retention is enhanced by modifying CaCO_3, and the best sulfur fixation efficiency is reached at 1000℃.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2004年第5期531-536,共6页
Journal of Fuel Chemistry and Technology
基金
国家重点基础研究发展规划项目(G1999022204 01)。~~
