Investigation of SO2 and H2O poisoning over Cu-HPMo/TiO2 catalyst for Low temperature SCR: An experimental and DFT study

Jiang, Jin He; Zheng, Ruizi; Jia, Yongzhong; Guo, Li‐Na; Huang, Mingyan; Hu, Jia; Yongjun, Xia

doi:10.1016/j.mcat.2020.111044

Cited by 11 publications

(6 citation statements)

References 55 publications

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“…Figure 6a,c,e shows the stable adsorption configurations of NO in CuO X @ MnO X , CuO X , and MnO X , respectively. The adsorption configuration of NO in CuO X was consistent with the results of Jiang et al [49] Moreover, when NO was adsorbed in catalysts such as CuO X @MnO X , CuO X , and MnO X , three kinds of chemical bonds, ON (1.47 Å), CuN (1.51 Å), and MnN (1.68 Å), were formed with adsorption energies of −0.89, −0.95, and −1.44 eV, respectively. This indicated that the three catalysts have strong adsorption of NO.…”

Section: Resultssupporting

confidence: 90%

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Liao

Zhao

Yang

et al. 2022

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environmental compatibility. [2] However, the coexistence of NO and SO 2 in the flue gas makes the deactivation of the traditional catalysts, due to the competition adsorption of SO 2 and NO on the active sites of the catalyst surface, resulting in the change of catalyst structure and the decrease of NO conversion efficiency.Recently, many researchers have been focused on tuning the structures of the catalysts to avoid the poison effect caused by SO 2 . The design of active components with the construction of a unique hollow structure presents the enhanced catalytic performance on NO oxidation with the existence of SO 2 . [3] The cavity confinement effect of the hollow nanoreactor could realize the impact on the unique electronic and geometric structure for enhancing the charge transfer and separation in the temporal-spatial catalytic process. [4] The charge transfer induced by the hetero-shelled hollow structure may change the catalytic activity and selectivity. [5] Besides, more interesting catalysts have been developed and applied to NO oxidation, such as composites structure control from one dimensional to three dimensional, [6,7] surface active site including defects engineering, [8,9] and catalytic sites tuning on synergetic conversion. [2,10] Non-thermal plasma(NTP) technology has attracted lots of research attention for NO catalytic removal. [11] The combination of NTP and catalyst can promote the formation of reaction intermediates on the catalyst surface, thus reducing the activation energy of the reaction, and achieving the rapid selective catalytic oxidation of NO at low temperatures. [12][13][14][15] In fact, many researchers attentions have been paid to tune the engineering parameters of the NTP and the advanced catalyst structure design without exploring the synergetic effect on the temporal-spatial structure, which may induce spatial charge rearrangement and trigger the micro-domain surficial species reaction. For instance, Cui et al. [16] studied the process of simultaneous oxidation of NO and SO 2 using non-thermal plasma coupled with catalyst on engineering parameters control. They found that the oxidation efficiency of both NO and SO 2 could be significantly improved in conjunction with further oxidation by the wet electrostatic precipitator (WESP). Furthermore, because of the unique properties of the hetero-shelled hollow structure catalyst, it may also be easier to produce synergistic Facilitating the mass transfer and spatial charge separation is a great challenge for achieving efficient oxidation of NO and outstanding sulfur resistance. Herein, a hydrothermal-assisted confinement growth technique is used to fabricate well-defined three-dimensional CuOx@MnOx hetero-shelled hollow-structure catalysts. By integrating the coupled plasma space reactor and the porous hierarchical structure of the catalyst, excellent stability (10 h) and high conversion of NO (93.86%) are reached under the concentration of SO 2 (1000 mg m -3 ) and NO (200 mg m -3 ). Impressively, precise surface characterization ...

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Section: Resultssupporting

confidence: 90%

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Liao

Zhao

Yang

et al. 2022

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“…At the early stages of the reaction, activity increases by increasing the reaction time using water vapor as a poison with NO x conversion rising from 21% in 300 min to 30% at the end of the reaction for CoNT. Likewise, NO x conversions over NiNT and PtNT are enhanced to values up to 40% in 150 min, and the value greatly increases to 100% running the reaction beyond this time in 600 min.Most of the findings state that the SCR reactions in the presence of water vapor poison are inhibited since the referred vapor can compete by the active sites of the catalysts through competitive adsorption causing a decay in the NO x conversion at relatively low concentrations, e.g.,1–5% of H 2 O [ 56 , 57 , 58 ].…”

Section: Resultsmentioning

confidence: 99%

“…When water vapor is introduced, the adsorption of H 2 O on the active metal sites may occur, and the Lewis acid sites might be converted into Brønsted acid sites via bonding of a water molecule, in line with the findings [ 60 ]. The literature reports also show that the SO 2 might be harmful to the metal active sites in reason of the permanent and irreversible SO 2 adsorption on the metal, besides the competitive adsorption of NO x , CO and SO 2 for the active sites [ 15 , 56 ]. Another fact is that SO 2 addition may form elemental sulfur, which probably could cover the active metal surface and block the pores causing damage in the catalyst structure [ 8 , 61 ].…”

Section: Resultsmentioning

confidence: 99%

Effects of the Incorporation of Distinct Cations in Titanate Nanotubes on the Catalytic Activity in NOx Conversion

et al. 2021

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Effects of the incorporation of Cr, Ni, Co, Ag, Al, Ni and Pt cations in titanate nanotubes (NTs) were examined on the NOx conversion. The structural and morphological characterizations evidenced that the ion-exchange reaction of Cr, Co, Ni and Al ions with the NTs produced catalysts with metals included in the interlayer regions of the trititanate NTs whereas an assembly of Ag and Pt nanoparticles were either on the nanotubes surface or inner diameters through an impregnation process. Understanding the role of the different metal cations intercalated or supported on the nanotubes, the optimal selective catalytic reduction of NOx by CO reaction (SCR) conditions was investigated by carrying out variations in the reaction temperature, SO2 and H2O poisoning and long-term stability runs. Pt nanoparticles on the NTs exhibited superior activity compared to the Cr, Co and Al intercalated in the nanotubes and even to the Ag and Ni counterparts. Resistance against SO2 poisoning was low on NiNT due to the trititanate phase transformation into TiO2 and also to sulfur deposits on Ni sites. However, the interaction between Pt2+ from PtOx and Ti4+ in the NTs favored the adsorption of both NOx and CO enhancing the catalytic performance.

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“…81,82 In this regard, various selections of supports were expected to enhance the catalytic performance in the NH 3 -SCR process. [83][84][85] For instance, pretreated raw mud (PRM) was used as a support, and then CuO/PRM catalysts were synthesized by introducing varying CuO contents. 86 The results showed that 7 wt% CuO promoted the redox equilibrium of Cu 2+ + Fe 2+ 2 Cu + + Fe 3+ and induced more Cu + and surface oxygen active species.…”

Section: Support Derivationmentioning

confidence: 99%

Selective catalytic reduction of NO_x with NH₃ over copper-based catalysts: recent advances and future prospects

Liu,

Zhang,

et al. 2024

EES. Catal.

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Investigation of SO2 and H2O poisoning over Cu-HPMo/TiO2 catalyst for Low temperature SCR: An experimental and DFT study

Cited by 11 publications

References 55 publications

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Effects of the Incorporation of Distinct Cations in Titanate Nanotubes on the Catalytic Activity in NOx Conversion

Selective catalytic reduction of NO_x with NH₃ over copper-based catalysts: recent advances and future prospects

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Investigation of SO2 and H2O poisoning over Cu-HPMo/TiO2 catalyst for Low temperature SCR: An experimental and DFT study

Cited by 11 publications

References 55 publications

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Effects of the Incorporation of Distinct Cations in Titanate Nanotubes on the Catalytic Activity in NOx Conversion

Selective catalytic reduction of NOx with NH3 over copper-based catalysts: recent advances and future prospects

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Selective catalytic reduction of NO_x with NH₃ over copper-based catalysts: recent advances and future prospects