Effect of CO2 on the selective catalytic reduction of NO with NH3 of Fe0.4Ce0.6O2-δ catalyst: adsorption behavior
Source abstract
Abstract
Abstract Besides of NOx, CO2 is always abundantly present in the exhaust gas stream, which is important for the investigation of de-NOx. The presence of CO2 has an inhibiting effect on the NH3-SCR activity at temperatures below 300°C for the Fe0.4Ce0.6O2-δ catalysts. To make clear this impact of CO2 for NH3-SCR reaction, we further investigate the changes of NH3 and NOx adsorption behaviors, using in situ TPD and in situ DRIFTS technologies. The DRIFT spectra of CO2 adsorption show that weakly adsorbed carbonate and bicarbonate species were formed, leading to the changes in adsorption and activation behaviors of NH3 and NOx. On the one hand, the formed carbonate and bicarbonate can act as new acid sites thereby improvement of NH3 adsorption. On the other hand, the adsorption of NOx on Fe-O-Ce is suppressed by CO2 results from its competitive adsorption. Especially, the formation path of monodentate nitrate may be blocked by CO2, which is usually active intermediate species for the NH3-SCR reaction, resulting in the deactivation of CO2.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Catalytic Processes in Materials Science · Catalysis and Oxidation Reactions · Industrial Gas Emission Control
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Superior performance of Fe1–xWxOδ for the selective catalytic reduction of NOx with NH3: Interaction between Fe and W10.1021/acs.est.6b03589 ↗
2. Selective catalytic oxidation of ammonia to nitrogen over CuO/CNTs: The promoting effect of the defects of CNTs on the catalytic activity and selectivity10.1016/j.apcatb.2012.01.030 ↗
3. The effect of zirconia additive on the activity and structure stability of V2O5/WO3-TiO2 ammonia SCR catalysts10.1016/j.apcatb.2011.05.040 ↗
4. An IR study of thermally stable V2O5-WO3 -TiO2 SCR catalysts modified with silica and rare-earths (Ce, Tb, Er)10.1016/j.apcatb.2007.04.022 ↗
5. Substitution of WO3 in V2O5/WO3–TiO2 by Fe2O3 for selective catalytic reduction of NO with NH310.1039/C2CY20383A ↗
6. Determination of N2O emissions levels in the selective reduction of NOx by NH3 over an on-site-used commercial V2O5–WO3/TiO2 catalyst using a modified gas cell10.1007/s11244-010-9493-9 ↗
7. Theory and practice of metal oxide catalyst design for the selective catalytic reduction of NOx with NH310.1007/s11244-020-01350-8 ↗
8. Getting insight into the influence of SO2 on TiO2/CeO2 for the selective catalytic reduction of NO by NH310.1016/j.apcatb.2014.10.029 ↗
9. A superior Fe-V-Ti catalyst with high activity and SO2 resistance for the selective catalytic reduction of NOx with NH310.1016/j.jhazmat.2019.120970 ↗
10. A superior Ce-W-Ti mixed oxide catalyst for the selective catalytic reduction of NOx with NH310.1016/j.apcatb.2011.12.019 ↗
11. Inhibitory role of excessive NH3 in NH3-SCR on CeWOx at low temperatures10.1039/D0CY00096E ↗
12. Insight into the mesoporous FexCe1−xO2−δ catalysts for selective catalytic reduction of NO with NH3: Regulable structure and activity10.1016/j.jcat.2016.02.009 ↗
13. Novel cerium–tungsten mixed oxide catalyst for the selective catalytic reduction of NOx with NH310.1039/c1cc12168e ↗
14. Y.J. Kim, K.M. Min, J.K. Lee, S.B. Hong, B.K. Cho, I.-S. Nam, Effect of CO2 on the DeNOx activity of a small Pore zeolite copper catalyst for NH3/SCR, 6 (2014) 1186-1189.10.1002/cctc.201400093 ↗
15. A comparative kinetics study between Cu/SSZ-13 and Fe/SSZ-13 SCR catalysts10.1016/j.cattod.2015.01.025 ↗
16. Influence of NH3 and NO oxidation on the SCR reaction mechanism on copper/nickel and vanadium oxide catalysts supported on alumina and titania10.1016/S0920-5861(02)00055-X ↗
17. Structural effect of Ni/ZrO2 catalyst on CO2 methanation with enhanced activity10.1016/j.apcatb.2018.11.024 ↗
18. Participation of surface bicarbonate, formate and methoxy species in the carbon dioxide methanation catalyzed by ZrO2-supported Ni10.1016/j.apcatb.2017.06.063 ↗
19. Structure and stability of formates and carbonates on monoclinic zirconia: a combined study by density functional theory and infrared spectroscopy10.1021/jp803353v ↗
20. Insight into the reaction route of CO2 methanation: Promotion effect of medium basic sites10.1016/j.catcom.2013.10.034 ↗
21. Operando FT-IR study on basicity improvement of Ni(Mg, Al)O hydrotalcite-derived catalysts promoted by glow plasma discharge10.1088/2058-6272/aaf759 ↗
22. Enhancement of the NH3-SCR catalytic activity of MnTiOx catalyst by the introduction of Sb10.1016/j.apcata.2018.03.028 ↗
23. WO3 Promoted Mn–Zr Mixed Oxide Catalyst for the Selective Catalytic Reduction of NOx with NH310.1016/j.cej.2015.08.040 ↗
24. Cux-Nb1.1-x (x = 0.45, 0.35, 0.25, 0.15) bimetal oxides catalysts for the low temperature selective catalytic reduction of NO with NH310.1016/j.apcatb.2018.05.014 ↗
25. New aspects on the mechanism of C3H6 selective catalytic reduction of NO in the presence of O2 over LaFe1–x(Cu, Pd)xO3−δ perovskites10.1021/es302240m ↗
26. Shape dependence and sulfate promotion of CeO2 for selective catalytic reduction of NOx with NH310.1016/j.apcatb.2018.03.065 ↗
27. NH3-SCR reaction mechanisms of NbOx/Ce0.75Zr0.25O2 catalyst: DRIFTS and kinetics studies10.1016/j.molcata.2016.06.023 ↗
28. Novel V2O5–CeO2/TiO2 catalyst with low vanadium loading for the selective catalytic reduction of NOx by NH310.1016/j.apcatb.2014.03.049 ↗
29. NO SCR with propane and propene on Co-based alumina catalysts prepared by co-precipitation10.1016/j.apcatb.2006.12.009 ↗
30. Tourmaline-modified FeMnTiOx catalysts for improved low-temperature NH3-SCR performance10.1021/acs.est.9b02620 ↗
31. Impacts of niobia loading on active sites and surface acidity in NbOx/CeO2–ZrO2 NH3–SCR catalysts10.1016/j.apcatb.2015.05.038 ↗
32. Mechanistic study of the low temperature activity of transition metal exchanged zeolite SCR catalysts10.1016/j.cattod.2009.12.015 ↗
33. Mechanism of arsenic poisoning on SCR catalyst of CeW/Ti and its novel efficient regeneration method with hydrogen10.1016/j.apcatb.2015.11.042 ↗
34. High-performance Ag–Cu nanoalloy catalyst for the selective catalytic oxidation of ammonia10.1021/acsami.9b16349 ↗
35. Improved NOx reduction in the presence of alkali metals by using hollandite Mn–Ti oxide promoted Cu-SAPO-34 catalysts
36. Novel CeMoxOy-clay hybrid catalysts with layered structure for selective catalytic reduction of NOx by NH310.1039/C7RA12153A ↗
37. DRIFT Study of CuO–CeO2–TiO2 Mixed Oxides for NOx Reduction with NH3 at Low Temperatures10.1021/am5004969 ↗
38. Improved NOx reduction in the presence of SO2 by using Fe2O3-promoted halloysite-supported CeO2–WO3 catalysts10.1021/acs.est.8b05637 ↗
39. Mechanism of N2O formation during the low-temperature selective catalytic reduction of NO with NH3 over Mn–Fe spinel10.1021/es502585s ↗