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采用连续流动固定床石英反应器 ,在反应气体为 1%SO2 和 2 %CO ,流量为 180ml/min ,以及催化剂用量为0 5g的条件下 ,考察了经活化处理的稀土系列氧化物对CO还原SO2 的催化活性 ,探讨了空速、温度和水蒸气等因素对反应的影响 .所研究的样品依据对SO2 的转化能力可分为三组 :高活性的镧、镨、钕、钐、铕和钆氧化物 ;低活性的铈、钬和铒氧化物 ;无活性的铽和镝氧化物 .在活性最高的钕和钐氧化物样品上 ,45 0℃时SO2 的转化率 >98% .反应过程中 ,活性相为稀土氧硫化物 ,反应遵从COS中间物机理
A continuous flow fixed bed quartz reactor was used to study the effect of activated rare earth oxide on CO reduction under the conditions of 1% SO2 and 2% CO, flow rate of 180ml / min and catalyst dosage of 0 5g. The effects of space velocity, temperature, water vapor and other factors on the reaction were discussed.The samples studied can be divided into three groups according to their conversion ability to SO2: highly active lanthanum, praseodymium, neodymium, samarium, europium and Gadolinium oxide, low activity cerium, holmium and erbium oxide, inactive terbium and dysprosium oxide, SO2 conversion> 98% at 45 0 ° C on the most active neodymium and samarium oxide samples. , The active phase is rare earth oxysulfides, the reaction follows the COS intermediate mechanism