Experimental And Mechanism Research Of Nano-TiO₂ Catalytic Combustion To Desulfurization

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.