降低FCC再生烟气NOx排放助剂的开发

开发了用于降低FCC再生烟气NOx排放的RDNOx系列助剂（I型和II型助剂）。I型助剂为非贵金属助剂，主要是通过催化CO对NOx的还原反应以降低NOx排放；II型助剂为贵金属助剂，是用于替代传统Pt助燃剂，在等效助燃CO的同时减少NOx的生成。两类助剂可以单独使用，也可以同时使用。助剂性能评价结果表明，在催化剂藏量中加入0.5%~0.9%的II型助剂与2%~4%的I型助剂，可以在基本不影响FCC产品分布的情况下，使再生烟气NOx排放量降低50%～64%。

DEVELOPMENT OF DECREASING NOx EMISSION ADDITIVES FOR FCC FLUE GAS

Reducing NOx emission additives for FCC flue gas (RDNOx，types I and II) were developed. RDNOx-I, a non-noble metal additive, is used to reduce NOx emission through catalyzing the reaction of NOx reduction. RDNOx-II, a noble metal additive, is used to substitute Pt based CO promoter, as it can promote CO combustion and decrease NOx formation at the same time. RDNOx-I and II can be used separately or simultaneously. The evaluation results show that when 0.5%-0.9% of RDNOx-II and 2-4% of RDNOx-I are applied, NOx emission in flue gas is reduced by about 50%-64%, while no negative influence on FCC product distribution is observed.