Flowerlike FeO<sub><i>X</i></sub>–MnO<sub><i>X</i></sub> Amorphous Oxides Anchored on PTFE/PPS Membrane for Efficient Dust Filtration and Low-Temperature No Reduction
Rong Luo, Yiqing Zeng, Shengui Ju, Shasha Feng, Feng Zhang, Zhaoxiang Zhong, Weihong Xing
Abstract
The design and preparation of efficient catalytic membrane is the key to realizing dust filtration and denitration in one unit. Herein, flowerlike MnyFezOx amorphous oxide catalysts were anchored on a PTFE/PPS membrane via hydrothermal methods. The uniform flowerlike structure has low gas resistance and can provide large surface area. The synergy effect between Fe and Mn species promotes the growth of MnyFezOx catalyst on PTFE/PPS membrane, and it is conducive to the improvement of the surface acidity and redox properties. Because of the largest surface area, as well as suitable redox property and surface acidity, the NO removal efficiency of Mn4Fe1Ox@PTFE/PPS catalytic membrane is always >90% at temperatures of 115–180 °C under a gas hourly space velocity (GHSV) of 74 000 mL g–1 h–1. The durable test results reveal that Mn4Fe1Ox@PTFE/PPS has excellent long-term stability and SO2/H2O resistance. Finally, dust filtration test results show that Mn4Fe1Ox@PTFE/PPS has good dust filtration performance under different conditions. Overall, the data obtained in this work suggest that the Mn4Fe1Ox@PTFE/PPS catalytic membrane has great application prospects in the simultaneous dust and NO purification of low-temperature flue gas. We expected that this work can shed some light on the design and preparation of catalytic membranes.