Investigation on Fe-Co binary metal oxides supported on activated semi-coke for NO reduction by CO

Wang, Luyuan; Cheng, Xingxing; Wang, Zhiqiang; Ma, Chunyuan; Qin, Yukun

doi:10.1016/j.apcatb.2016.08.021

Cited by 228 publications

(159 citation statements)

References 82 publications

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“…, several distinct bands first appeared at 1377, 1363 and 1354 cm −1 , and then the intensities of the bands gradually increased over time, and finally two weak sub‐bands at 1134 and 1164 cm −1 were also seen. The bands at 1100–1400 cm −1 were attributed to sulfur‐containing species . The findings indicated that the type of sulfur‐containing functional groups may have changed as the reaction progressed.…”

Section: Resultsmentioning

confidence: 94%

“…The bands at 1100-1400 cm −1 were attributed to sulfur-containing species. 18,19 The findings indicated that the type of sulfur-containing functional groups may have changed as the reaction progressed. Chen et al 20 reported that the bands at 1377, 1357, and 1345 cm −1 might be ascribed to the adsorbed form of SO 2 *.…”

Section: Analysis Of Desulfurization Products Of Activated Cokes Modimentioning

confidence: 99%

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Study of the properties of adsorption of SO₂ – thermal regeneration cycle of activated coke modified by oxidization

Cui

Tang

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND In order to clarify the effect of thermal regeneration on the desulfurization performance of activated coke, consecutive adsorption of SO2–thermal regeneration cycle experiments were carried out under different thermal conditions in this study. RESULTS Results showed that the decrease in breakthrough sulfur capacity was not very significant for the cokes except for the first regeneration cycles. From 400–600 °C, the higher the regeneration temperature was, the better the desulfurization activity of the cokes after regeneration. Various means (FT‐IR, BET, XPS, TGA, SEM and in situ DRIFTS) were used to characterize samples. The results indicated that the desulfurization products were divided into physisorbed SO2, H2SO4 and sulfate. The phenolic hydroxyl and carboxyl groups on the surface of activated cokes promoted the removal of SO2. CONCLUSION The deposition of sulfate resulted in a significant decrease in the sulfur capacity of activated coke after the first two regeneration cycles. However, the residual amount of sulfate on the activated coke after regeneration declined with increasing regeneration temperature. Moreover, the phenolic hydroxyl and carboxyl groups did not disappear after regeneration, resulting in the desulfurization activity of cokes remaining relatively stable during subsequent desulfurization cycles. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 94%

Section: Analysis Of Desulfurization Products Of Activated Cokes Modimentioning

confidence: 99%

Study of the properties of adsorption of SO₂ – thermal regeneration cycle of activated coke modified by oxidization

Cui

Tang

et al. 2017

J of Chemical Tech & Biotech

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“…Wang et al . also reported that metal oxides formed metal‐□‐metal structures on the carrier surface which was crucial for the dissociation of NO …”

Section: Resultsmentioning

confidence: 96%

“…24 Wang et al also reported that metal oxides formed metal-◽-metal structures on the carrier surface which was crucial for the dissociation of NO. 33 In order to further confirm the synergistic effects and catalysis activity of metal oxides, we prepared bimetallic catalyst using MnO 2 and Fe 2 O 3 , and the NO removal performance was measured ( Fig. 5).…”

Section: Denitrification Activitymentioning

confidence: 97%

Suitability of pyrolusite as additive to activated coke for low‐temperature NO removal

Yang

Jiang

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND Pyrolusite was used as additive to prepare coal‐based activated coke (AC) for low‐temperature NO removal. The pyrolusite modified AC was prepared by a blending method, and the denitrification performance was evaluated in a lab‐scale simulated fixed‐bed reactor. RESULTS The blending of pyrolusite promoted the specific surface area and pore structure of AC, even though the MnO2 and Fe2O3 showed inhibitory effects when blended separately. Both the basic and acid sites of AC‐Mn(x) increased owing to the participation of the blended MnO2 during the activation, while the blending of Fe2O3 showed an inhibited effect. AC‐P10 showed the highest NO removal efficiency at 74.2%, which was 32.8%, 27.0% and 24.2% higher than that of AC, AC‐Mn4 and AC‐Fe6. The operating temperature adaptability and stability of catalysis activity of AC‐P10 are good. Manganese is the main catalyst of AC‐P(x), and Fe is an accelerant to stimulate the catalytic activity of Mn. The extremely high NO removal activity of AC‐P(x) was due to the synergistic effect of surface functional groups and metals, but the catalysis of metals played a more important role. CONCLUSION Pyrolusite is suitable to prepare the AC‐based denitrification catalyst (AC‐P(x)) for SCR NO removal because the Mn and Fe contained in the pyrolusite showed a synergistic effect. © 2017 Society of Chemical Industry

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“…Noble metal‐based catalysts are often commercially used in the abatement of NO x , but due to their high costs and prominent scarcity,, considerable efforts have been made in order to develop non‐noble transition metal oxide catalysts as efficient alternatives in the catalytic NOx reduction . For instance, perovskite‐type mixed oxides, 12 copper, iron, cobalt, nickel, cerium oxides or mixtures of those,, have been investigated for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Zirconia‐Supported Cobalt Catalysts: Activity and Selectivity in NO Reduction by CO

et al. 2017

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Cobalt catalysts supported on tetragonal and monoclinic zirconia were prepared using a one‐pot procedure through the incorporation of a Co3O4 colloidal suspension during the support synthesis and evaluated in the reaction of NO reduction by CO. A better dispersion of the active phase was obtained by this method when compared to the conventional impregnation one. Furthermore, the crystalline phase of zirconia in the supports had a crucial effect in the dispersion of the cobalt species, being that the pure tetragonal phase led to a higher dispersion of the active phase. The one‐pot prepared tetragonal zirconia led to cobalt active species that consisted in well‐dispersed small agglomerates of Co3O4 and Co2+ species as oxo‐ions which displayed the best catalytic performance among the studied catalysts, with the highest NO conversion (75%) and high selectivity to N2 (85%) at 300 °C. These results show that the one‐pot methodology employed in this work has a strong potential to produce suitable catalysts for the abatement of NOx emissions.

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Investigation on Fe-Co binary metal oxides supported on activated semi-coke for NO reduction by CO

Cited by 228 publications

References 82 publications

Study of the properties of adsorption of SO₂ – thermal regeneration cycle of activated coke modified by oxidization

Study of the properties of adsorption of SO₂ – thermal regeneration cycle of activated coke modified by oxidization

Suitability of pyrolusite as additive to activated coke for low‐temperature NO removal

Zirconia‐Supported Cobalt Catalysts: Activity and Selectivity in NO Reduction by CO

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Investigation on Fe-Co binary metal oxides supported on activated semi-coke for NO reduction by CO

Cited by 228 publications

References 82 publications

Study of the properties of adsorption of SO2 – thermal regeneration cycle of activated coke modified by oxidization

Study of the properties of adsorption of SO2 – thermal regeneration cycle of activated coke modified by oxidization

Suitability of pyrolusite as additive to activated coke for low‐temperature NO removal

Zirconia‐Supported Cobalt Catalysts: Activity and Selectivity in NO Reduction by CO

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Study of the properties of adsorption of SO₂ – thermal regeneration cycle of activated coke modified by oxidization

Study of the properties of adsorption of SO₂ – thermal regeneration cycle of activated coke modified by oxidization