Development of Red Mud Coated Catalytic Filter for NOx Removal in the High Temperature Range of 300–450 °C
- 7 Downloads
The red mud (RM) coated catalytic filter was developed as efficient multifunctional material to simultaneously remove NOx and dust in the high temperature range of 300–450 °C, which exhibits excellent deNOx activity/durability as well as low pressure drop with more than 80% NO conversion in the presence of H2O/SO2. The performance of the RM coated catalytic filter is obviously superior to that of the reference samples of V–W–Ti and Fe–Ti based filter. The multiple characterization data (including XRD, XRF, BET, SEM, TPX and LPSA) reveals the amorphous state of the RM catalyst with high dispersity of Fe active sites accounts for the high adsorption capacity of NH3 and thus excellent deNOx performance. Moreover, the prepared colloidal RM slurry is very uniform and stable with the smallest average particle size, which reduces the blocking up of the channel of filter and facilitates the decrease of pressure drop as well as the improvement of deNOx activity. The excellent deNOx performance, low pressure drop together with the low cost make the RM coated catalytic filter to be promising application prospect for purification of the high-temperature flue gas with high content of dust such as in cement and glass furnaces.
KeywordsRed mud Catalytic filter Selective catalytic reduction Pressure drop
The authors are grateful for the financial support of International Science and Technology Cooperation Program of China (2016YFE0128300), Natural Science Foundation of China (Grant 21601192 and 21878310) and the independent subject from State Key Laboratory of Multi-phase Complex Systems (Grant MPCS-2019-0-03).
Compliance with Ethical Standards
Conflict of interest
The authors declare that they have no competing interest.
- 12.Kim Y, Choi J, Yu L, Bak Y (2007) Modification of V2O5-WO3/TiO2 catalysts supported on SiC filter for NO reduction at low temperature. Solid State Phenom 124:1713–1716. https://doi.org/10.4028/www.scientific.net/SSP.124-126.1713 CrossRefGoogle Scholar
- 17.Yang SJ, Liu CX, Chang HZ, Ma L, Qu Z, Yan NQ, Wang CZ, Li JH (2013) Improvement of the activity of gamma-Fe2O3 for the selective catalytic reduction of NO with NH3 at high temperatures: NO reduction versus NH3 oxidization. Ind Eng Chem Res 52:5601–5610. https://doi.org/10.1021/ie303272u CrossRefGoogle Scholar
- 22.Yu C, Li CM, Zhang YS, Guo F, Yu J, Yang YQ, Xu GW (2018) The effect of ceramic matrices on the dispersion of loaded catalyst and the deNOx activity of catalytic filters. J Chem Ind Eng 69:682–689. https://doi.org/10.11949/j.issn.0438-1157.20170939 Google Scholar