Effect of copper precursor on simultaneous removal of PM and NO x of a 2-way SCR/CDPF

Kang, Woo-Seok; Choi, Byungchul

doi:10.1016/j.ces.2015.11.007

Cited by 34 publications

(5 citation statements)

References 33 publications

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“…Higher pH is more conducive to the formation of binuclear hydroxyl complexes [Cu 2 (OH) 2 2+ ]aq, a key intermediate for ion exchange . Kang et al . clearly showed that the main reason for the variance on copper ion exchange was that the copper salt precursor directly affected the location of Cu on the Al site of zeolites after thermal aging, thus affecting the level of copper ion exchange in zeolites.…”

Section: Resultsmentioning

confidence: 99%

“…16 Higher pH is more conducive to the formation of binuclear hydroxyl complexes [Cu 2 (OH) 2 2+ ]aq, a key intermediate for ion exchange. 15 Kang et al 17 clearly showed that the main reason for the variance on copper ion exchange was that the copper salt precursor directly affected the location of Cu on the Al site of zeolites after thermal aging, thus affecting the level of copper ion exchange in zeolites. Allahyari et al found that the different volatility of precursors was another property that affected the dispersity and homogeneity of the active components of the catalyst, 18 which naturally affected the final Cu loading amount.…”

Section: Nox Removal By Cu/zsm-5mentioning

confidence: 99%

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Influence mechanism of different precursors on the adsorption behavior of NOx over Cu²⁺ ion‐exchange ZSM‐5

Tang

Zhang

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND The combined Adsorption‐Nonthermal Plasma Catalytic process (A‐NTP‐C) which is used for decomposition of NOx has become a technical approach of high research value.Many studies have shown that the better the adsorption performance of the catalyst in the A‐NTP‐C process, the higher the conversion of NO. The type of Cu precursors will affect the chemical/physical properties of Cu‐based catalysts, thus influencing the adsorption performance of catalysts. In this study, an ion exchange process was used to prepare Cu/ZSM‐5 catalysts with three Cu precursors, namely copper acetate (AC‐Cu), copper nitrate (N‐Cu) and copper sulfate (S‐Cu). Results Different Cu precursors led to differences in Cu ion exchange capacity of Cu/ZSM‐5; the Cu content of AC‐Cu/ZSM‐5 was the highest. Furthermore, even with the same Cu content as N‐Cu/ZSM‐5 and S‐Cu/ZSM‐5, the AC‐Cu/ZSM‐5 catalyst showed the best adsorption performance. Conclusion X‐ray photoelectron spectroscopy results indicated that CuO and isolated tetrahedron‐coordinating Cu(II) were the main forms of Cu species on Cu/ZSM‐5. The results of in situ DRIFTs indicated that NO was oxidized by CuO and the generated NO2 was adsorbed by H+ and isolated Cu (II). The AC‐Cu/ZSM‐5 catalysts had the largest amount of tetrahedron‐coordinating isolated Cu (II) and the strongest H+ electrophilic ability, giving it the best NOx adsorption performance. The different precursors had little effect on the ZSM‐5 structure, but did cause differences in pore volume, which might influence the adsorption capacity of NOx to some extent. These conclusions provide new ideas and methods for optimizing the adsorption capacity of Cu/ZSM‐5. © 2019 Society of Chemical Industry © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Nox Removal By Cu/zsm-5mentioning

confidence: 99%

Influence mechanism of different precursors on the adsorption behavior of NOx over Cu²⁺ ion‐exchange ZSM‐5

Tang

Zhang

et al. 2019

J of Chemical Tech & Biotech

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“…Exhaust gas after-treatment technology mainly includes: diesel oxidation catalyst (DOC) for oxidation removal of CO, hydrocarbons and soluble organic fractions (SOF), catalyzed diesel particulate filter (CDPF) for filtration and catalytic elimination of PM, continuous regenerating trap (CRT, consists by DOC and DPF) for regeneration of particulate trap, selective catalytic reduction (SCR), and nitrogen oxide storage reduction (NSR) for elimination of NO x . However, the above-mentioned methods could not simultaneously remove PM and NO x by one technology . Therefore, great efforts have been made by researchers to develop new technology to simultaneously remove PM and NO x .…”

Section: Introductionmentioning

confidence: 99%

“…However, the abovementioned methods could not simultaneously remove PM and NO x by one technology. 13 Therefore, great efforts have been made by researchers to develop new technology to simultaneously remove PM and NO x . 14 Yoshida et al 15 first proposed the simultaneous elimination of PM and NO x by a single catalyst.…”

Section: Introductionmentioning

confidence: 99%

3DOM Mn-Based Perovskite Catalysts Modified by Potassium: Facile Synthesis and Excellent Catalytic Performance for Simultaneous Catalytic Elimination of Soot and NO_x from Diesel Engines

Zheng

Liu

et al. 2021

J. Phys. Chem. C

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Diesel engines have been widely applied, while the pollutants emitted from diesel engines have caused serious environmental pollution and human health hazards, especially for soot and NO x . Nowadays, the design and preparation of catalysts with excellent catalytic activity for simultaneous removal of soot and NO x is a great challenge in the field of diesel exhaust abatement. In this work, a series of three-dimensional ordered macroporous (3DOM) La1–x K x MnO3 catalysts with high activity for the simultaneous elimination of soot and NO x were synthesized by the colloidal crystal template method. The physicochemical properties of the as-prepared catalysts were characterized via XRD, Raman, FT-IR, SEM, TEM, N2 adsorption–desorption, XPS, H2-TPR, O2-TPD, NH3-TPD, NO-TPD, NO-TPO, and so on. The results of catalytic performance illustrated that 3DOM La0.75K0.25MnO3 exhibited highest catalytic activity with a maximum concentration of CO2 at 357 °C (T 10 = 336 °C, T 50 = 365 °C, and T 90 = 406 °C) and 50–60% NO conversion in the temperature range of 140–260 °C. Meanwhile, the reaction mechanism of 3DOM La1–x K x MnO3 catalysts was also proposed based on the characterization results and DFT calculation. The reasons for high catalytic activity are related to the strong oxidizability of high-valence B-site ions, the abundance of active oxygen species and suitable acid sites, good reducibility, and the 3DOM structure.

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“…For these applications, the combination of LNT and SCR presents significant advantages in terms of increase in NOx conversion efficiency and of reduction in ammonia slip [13]. Other solutions being explored are related to the inclusion of NOx-removal functions into the DPF substrate [14] as a way to reduce the cost of the monoliths and the space requirements. Recently, non-ceramic solutions such as the particle oxidation catalyst (POC) are also being considered [15].…”

mentioning

confidence: 99%

Phenomenological methodology for assessing the influence of flow conditions on the acoustic response of exhaust aftertreatment systems

Torregrosa

Arnau

Piqueras

et al. 2017

Journal of Sound and Vibration

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Effect of copper precursor on simultaneous removal of PM and NO x of a 2-way SCR/CDPF

Cited by 34 publications

References 33 publications

Influence mechanism of different precursors on the adsorption behavior of NOx over Cu²⁺ ion‐exchange ZSM‐5

Influence mechanism of different precursors on the adsorption behavior of NOx over Cu²⁺ ion‐exchange ZSM‐5

3DOM Mn-Based Perovskite Catalysts Modified by Potassium: Facile Synthesis and Excellent Catalytic Performance for Simultaneous Catalytic Elimination of Soot and NO_x from Diesel Engines

Phenomenological methodology for assessing the influence of flow conditions on the acoustic response of exhaust aftertreatment systems

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Effect of copper precursor on simultaneous removal of PM and NO x of a 2-way SCR/CDPF

Cited by 34 publications

References 33 publications

Influence mechanism of different precursors on the adsorption behavior of NOx over Cu2+ ion‐exchange ZSM‐5

Influence mechanism of different precursors on the adsorption behavior of NOx over Cu2+ ion‐exchange ZSM‐5

3DOM Mn-Based Perovskite Catalysts Modified by Potassium: Facile Synthesis and Excellent Catalytic Performance for Simultaneous Catalytic Elimination of Soot and NOx from Diesel Engines

Phenomenological methodology for assessing the influence of flow conditions on the acoustic response of exhaust aftertreatment systems

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Influence mechanism of different precursors on the adsorption behavior of NOx over Cu²⁺ ion‐exchange ZSM‐5

Influence mechanism of different precursors on the adsorption behavior of NOx over Cu²⁺ ion‐exchange ZSM‐5

3DOM Mn-Based Perovskite Catalysts Modified by Potassium: Facile Synthesis and Excellent Catalytic Performance for Simultaneous Catalytic Elimination of Soot and NO_x from Diesel Engines