FeCoY催化剂的催化还原脱硫脱硝性能

Properties of FeCoY catalysts and catalytic reduction activity for desulfurization and denitrification

摘要:

摘要：以CO为还原剂，FeCoY为活性组分，采用等体积浸渍法制备了一系列不同负载量，不同载体的催化剂样品，并在微型固定床反应器上探讨催化剂同时脱硫脱硝活性及抗氧化性。通过XRD、BET、H2-TPR对催化剂进行了表征。结果表明：经过硝酸预处理的催化剂能显著提高催化剂的性能；通过FeCoY三金属正交实验，得到活性组分Fe、Co、Y分别占载体的质量分数为10%、6%、3%的催化剂10Fe6Co3Y/AC为最优组合，脱硫脱硝转化率均能达100%，脱硫脱硝转化率同时达到90%时的温度T90%约为218℃。XRD结果表明：催化剂具有尖晶石结构。抗氧化性实验结果表明：初步判断脱硫过程遵循Redox-COS协同作用机理，而脱硝仅遵循COS机理，体积分数为1%的O2对NO和SO2的活性位点表现出不同的毒害作用。

Abstract:

Abstract：The catalyst samples of different load and different supports were prepared by equal volume impregnation method using FeCoY as active component, the catalyst was characterized by XRD, BET and H2-TPR. The experiments were investigated on aminiature fixed bed reactor about the activity of catalysts for simultaneous desulfurization and denitrification and oxidation resistance by using CO as reducing agent gas. The results show: the nitric acid pretreated catalyst can significantly improve the performance of the catalyst. The catalyst 10Fe6Co3Y/AC with the active components Fe, Co and Y respectively occupying 10%, 6% and 3% of the carrier is the best combination and the conversion rate of desulfurization and denitrification can reach 100%, The temperature at which the desulfurization and denitrification conversion rate reaches 90% at the same time is about 218 °C. XRD results shows that the catalyst has a spinel structure. The results of antioxidant experiments show that: it is preliminarily judged that the desulfurization process follows the Redox-COS synergistic mechanism, while the denitration only follows the COS mechanism., O2 with a volume fraction of 1% exhibits different toxic effects on the active sites of NO and SO2.