Inorganic Chemicals Industry >
Neodymium-modified iron-based catalysts for nitrogen oxides removal
Received date: 2022-08-01
Online published: 2023-03-17
Metal Fe and Nd were introduced into the surface of commercial TiO2 by stepwise impregnation to study its denitrification performance.The samples were characterized by X-ray diffraction（XRD），nitrogen adsorption-desorption（N2-BET），X-ray photoelectron spectroscopy（XPS），ammonia temperature-programmed desorption（NH3-TPD），hydrogen temperature-programmed reduction（H2-TPR）.The adsorption and desorption of N2 showed that the introduction of Nd reduced the specific surface area of the catalysts loaded with Fe.X-ray diffraction analysis showed that the introduced metal species had good dispersion on the catalyst surface.The results of NH3-TPD test showed that the introduction of Nd increased the total acid content of the catalyst and changed the acid distribution of the catalyst.XPS results showed that Nd modification increased the content of oxygen and Fe2+ on the surface of the catalyst，which was beneficial to the denitrification reaction.H2-TPR test showed that the introduction of Nd reduced the redox performance of the catalyst slightly.The results of activity test showed that appropriate Nd loading was beneficial to improve the denitrification performance of the catalyst.When the mass fraction of Nd element in the catalyst was 9%，the catalyst had the best denitrification efficiency of 81.4%.
LI Peng , YANG Siyuan , LUO Shizhong , DU Peining , TAN Renjun , JING Fangli . Neodymium-modified iron-based catalysts for nitrogen oxides removal[J]. Inorganic Chemicals Industry, 2023 , 55(3) : 140 -146 . DOI: 10.19964/j.issn.1006-4990.2022-0366
| 1 | ZHANG Runduo， LIU Ning， LEI Zhigang，et al.Selective transformation of various nitrogen-containing exhaust gases toward N2 over zeolite catalysts[J].Chemical Reviews，2016，116（6）:3658-3721. |
| 2 | BAE S W， ROH S A， KIM S D.NO removal by reducing agents and additives in the selective non-catalytic reduction（SNCR） process[J].Chemosphere，2006，65（1）:170-175. |
| 3 | FANG De， QI Kai， LI Fengxiang.Excellent sulfur tolerance performance over Fe-SO4/TiO2 catalysts for NH3-SCR:Influence of sulfation and Fe-based sulfates[J].Journal of Environmental Chemical Engineering，2022，10（1）.Doi:10.1016/j.jece.2021.107038. |
| 4 | WANG Fang， GUI Keting， YAO Guihuan.The comparison of selective catalytic reduction of de-NO x on iron-based materials[C]//Asia-Pacific Power and Energy Engineering Conference （APPEEC），2009:2434-2436. |
| 5 | KATO A， MATSUDA S， KAMO T，et al.Reaction between NO x and NH3 on iron oxide-titanium oxide catalyst[J].The Journal of Physical Chemistry，1981，85（26）:4099-4102. |
| 6 | HUANG Li， ZONG Yuhao， WANG Hu，et al.Effect of neodymium addition on plate-type V2O5-MoO3/TiO2 catalyst for selective catalytic reduction of NO[J].Rare Metal Materials and Engineering，2021，50（2）:0475-0482. |
| 7 | XIE Shangzhi， LI Lulu， JIN Lijian，et al.Low temperature high activity of M（M=Ce，Fe，Co，Ni） doped M-Mn/TiO2 catalysts for NH3-SCR and in situ DRIFTS for investigating the reaction mechanism[J].Applied Surface Science，2020，515.Doi:10.1016/j.apsusc.2020.146014. |
| 8 | WU Xu， WANG Ruonan， DU Yaili，et al.Performance enhancement of NH3-SCR via employing hydrotalcite-like precursor to induce the decoration of NiO by TiO2 phase[J].Molecular Catalysis，2019，467:150-160. |
| 9 | THIRUPATHI B， SMIRNIOTIS P G.Nickel-doped Mn/TiO2 as an efficient catalyst for the low-temperature SCR of NO with NH3:Catalytic evaluation and characterizations[J].Journal of Catalysis，2012，288:74-83. |
| 10 | FAN Zhaoyang， SHI Jianwen， GAO Chen，et al.Gd-modified MnOx for the selective catalytic reduction of NO by NH3:The promoting effect of Gd on the catalytic performance and sulfur resistance[J].Chemical Engineering Journal，2018，348:820-830. |
| 11 | MA Ziran， WU Xiaodong， FENG Ya，et al.Effects of WO3 doping on stability and N2O escape of MnO x -CeO2 mixed oxides as a low-temperature SCR catalyst[J].Catalysis Communications，2015，69:188-192. |
| 12 | XIE Shangzhi， LI Lulu， JIN Lijian，et al.Low temperature high activity of M（M=Ce，Fe，Co，Ni） doped M-Mn/TiO2 catalysts for NH3-SCR and in situ DRIFTS for investigating the reaction mechanism[J].Applied Surface Science，2020，515.Doi:10.1016/j.apsusc.2020.146014. |
| 13 | WU Jiahui， JIN Shuanglin， WEI Xudong，et al.Enhanced sulfur resistance of H3PW12O40-modified Fe2O3 catalyst for NH3-SCR:Synergistic effect of surface acidity and oxidation ability[J].Che-mical Engineering Journal，2021，412.Doi:10.1016/j.cej.2021.128712. |
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