Fe-USY zeolite catalyst for effective decomposition of nitrous oxide.
Zeolite matrix FAU is applied as an effective support that can be readily exchanged with ferric ions simply by wet ion exchange. The high exchange degree in this zeolite (USY) probably benefits from its larger channel dimension, which makes the diffusion of hydrated ferric ions into the channels easier. The as-prepared and subsequently calcined Fe-USY samples contain various kinds of iron species, which enable Fe-USY to efficiently decompose N2O to N2 and O2. The presence of O2 (20%), H2O (2%), or both reduces the N2O conversion only to a small extent at the same temperature. To test the feasibility and the catalytic activity in a practical situation, we prepared a monolithic Fe-USY/cordierite sample and investigated the N2O conversion under similar conditions. Such a cordierite-supported Fe-USY catalyst (approximately 9 wt % USY and 0.5 wt % Fe) shows the catalytic performance in N20 decomposition similar to the pure Fe-USY catalyst. Remarkably, both the pure Fe-USY and Fe-USY/cordierite catalysts demonstrate a very good durability because there is no activity lost after 100 and 144 h tests. Thus, the Fe-USY zeolite shows its potential as a cost-effective catalyst for N2O elimination in future applications.
Li
Lan Dong
LD
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
Shen
Qun
Q
Yu
Jun Jie
JJ
Hao
Zheng Ping
ZP
Xu
Zhi Ping
ZP
Lu
G Q Max
GQ
D002384:Catalysis; D003362:Cost-Benefit Analysis; D005290:Ferric Compounds / Q000737:chemistry; D007477:Ions; D007501:Iron / Q000737:chemistry*; D008956:Models, Chemical; D009584:Nitrogen / Q000737:chemistry*; D009589:Nitrogen Oxides / Q000737:chemistry*; D009609:Nitrous Oxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D015203:Reproducibility of Results; D013696:Temperature; D017641:Zeolites / Q000737:chemistry*
D005290:Ferric Compounds; D007477:Ions; D009589:Nitrogen Oxides; D017641:Zeolites; D007501:Iron; D009609:Nitrous Oxide; D009584:Nitrogen; D010100:Oxygen