【摘要】 以煤气为还原剂、Fe为活性金属催化还原冶炼烟气中SO₂制取硫磺。研究了不同载体、不同金属含量、稀土Sm及其含量对SO₂还原成S单质催化活性的影响。结果表明,载体Al₂O₃粉末越细,SO₂还原反应出的硫温度越低;催化剂中金属Fe的最佳含量（质量分数）为14%,当反应温度为400℃时,硫的产率为81.92%;稀土Sm的加入提高了催化剂的反应活性,当反应温度为360℃时,Sm-Fe/Al₂O₃的硫产率与Fe/Al₂O₃相比提高了40.5%。Sm-Fe/Al₂O₃催化剂的活性与Sm含量存在一定的关系,本试验条件下,稀土Sm的最佳含量（质量分数）为1.0%。更多还原

【Abstract】 The catalytic reduction of SO₂ in the flue gas produced in metallurgical process to sulfur with coal gas as a reducing agent is studied over the catalyst of Fe/Al₂O₃ in this paper.Effects of the different support,the different metal content,the rare earth of samarium and its content on the reduction of SO₂ to sulfur are investigated.The experimental results indicates that the finer the powder of Al₂O₃,the lower formation temperature of sulfur.The optimal content of ferrous is 14wt%in the catalyst of Fe/Al₂O₃,in this condition the yield of sulfur achieves 81.92% when the reaction temperature is 400℃.The addition of samarium to the catalyst increases the reaction activity,the yield of sulfur on the catalyst of Sm-Fe/Al₂O₃ is 40.5%higher than that of the catalyst of Fe/Al₂O₃ at the temperature of 360℃.And the catalyst containing different samarium content has different sulfur yield.The optimal content of samarium in Sm-Fe/Al₂O₃ catalyst is found to be about 1.0wt%.更多还原