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本文以FeZSM-5为催化剂开展N_2O直接催化分解的研究,探究了8μm的FeZSM-5经水蒸气处理后对催化N_2O分解性能的影响,发现经水蒸气处理后的FeZSM-5具有更优异的催化活性。并深入探讨了水蒸气处理后催化活性提高的原因。研究发现,沸石分子筛FeZSM-5经过水蒸气处理后骨架中的Fe迁移到了外骨架,催化N_2O直接降解的关键因素是外骨架Fe,催化剂的孔结构、酸中心数量和类型对N_2O直接降解反应的影响很小。
In this paper, FeZSM-5 catalyst for the direct catalytic decomposition of N 2 O to explore the 8μm FeZSM-5 after steam treatment of N_2O decomposition of the catalytic performance of the steam-treated FeZSM-5 has more excellent catalytic active. The reasons for the increase of catalytic activity after steam treatment were discussed in depth. The results showed that Fe in zeolitic zeolite migrated to the exoskeleton after steam treatment, and the key factors for the direct degradation of N 2 O were the exoskeleton Fe, the pore structure of the catalyst, the number and type of acid sites, and the direct degradation of N 2 O Little effect.