【作者】 李丹丹；

【导师】 王淑勤；

【作者基本信息】 华北电力大学（河北） ， 环境工程， 2008， 硕士

【摘要】 本文对纳米TiO₂催化燃烧固硫进行了实验研究。通过对燃烧后煤灰的成分分析和燃烧烟气中SO₂含量的测定,确定其固硫效果。探讨了纳米TiO₂添加量、Ca/S、燃烧温度和不同条件制备的纳米TiO₂对分析纯CaO固硫的影响。通过对反应产物的红外、X射线衍射、比表面积分析以及原煤的热重分析,讨论了纳米TiO₂催化燃烧固硫的机理。实验结果表明,纳米TiO₂对CaO具有一定的催化燃烧固硫作用,能够提高CaO固硫效果。在最佳实验条件下,纳米TiO₂添加量为8%,钙硫比Ca/S为2,燃烧温度为850℃,通氧量为40ml/min,烟煤固硫率为87.7%,褐煤固硫率为87.8%,比不添加纳米TiO₂时固硫效率分别提高了16.9%和13.4%。更多还原

【Abstract】 Experiment research of nanometer TiO₂ catalytic combustion to desulfurization is studied in this work. Desulfurization effect is measured by the composition analysis of fly ash that after combustion and the content of SO₂ in flue gas. The effect to analysis pure CaO desulfurization by nanometer TiO₂ addition、Ca/S ratio、combustion temperature and nanometer TiO₂ that prepared at different condition are discussed. The combustion desulfurization mechanisms are discussed by infrared absorption and XRD and BET and TGA analysis. The experiment results show that nanometer TiO₂ have definite combustion catalytic effect to CaO combustion desulfurization, and can promote the desulfurization effect of CaO. The optimal addition of the experiment is that nanometer TiO₂ is 8%,Ca/S ratio is 2, combustion temperature is 850℃,the flux of oxygen is 40ml/min.In this condition, the desulfurization efficiency of bituminous and lignite can achieve to 87.7% and 87.8%, it was respectively increased by 17.1% and 13.4% compared with the efficiency of CaO act only.更多还原