【摘要】 通过实验,研究了三种晶型的氧化铁脱硫剂（Fe₃O₄、γ-Fe₂O₃和α-Fe₂O₈）对SO₂的吸收特性。结果表明,在380～450℃的温度范围,对于新制脱硫剂,Fe₃O₄的脱硫速率最快;而对于再生后的脱硫剂,不同初始晶型的氧化铁均转化成α-Fe₂O₃,并且其活性较初始α-Fe₂O₃有较大幅度的提高。X射线分析表明,氧化铁吸收SO₂后的产物主要为Fe₂（SO₄）₃。吸收剂在645℃下再生,放出SO₂和SO₃。对氧化铁吸收SO₂的过程进行了热力学计算,表明在450℃下,吸收反应为不可逆反应,脱硫率可达100％。探讨了因氧化铁表面吸附水蒸汽而加速SO₂吸附及氧化的作用机理。更多还原

【Abstract】 Absorption features of SO2 on three ferric oxides ( Fe2O4, γ-Fe2O4 and α-Fe2O3) were studied experimentally. In the temperature range of 389-450℃,Fe3O4 afforded a fastest absorption rate among all fresh absorbents tested, but after regeneration,the all absorbents in different initial crystalls transferred into α-Fe2O3 and moreover had a much better activity than the fresh α-FetO3. X-ray analysis showed that the main absorption product was Fei(SO4)3. The absorbents were regenerated at 645℃, giving off SO2 and SO3. The thermodynamical calculation showed the absorption reaction of SO2 with ferric oxides is a non-reversible reaction and 100% S will be removed. Also discussed is the mechanism of acoeleratingSO2 adsorption and oxidation through adsorption of HzO vapour on the surface of ferric oxides.更多还原