Advancements in (SCR) technologies for NOx reduction: A comprehensive review of reducing agents

Process Safety and Environmental Protection, Journal Year: 2024, Volume and Issue: 184, P. 854 - 880

Published: Feb. 17, 2024

Language: Английский

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Selective catalytic reduction of NO by CO over spinel CuFe2O4 catalyst: The vital role of oxygen vacancies

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 113218 - 113218

Published: May 31, 2024

Language: Английский

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Enhancing the resistance of single-atom and cluster catalysts in CO-SCR to water, sulfur, and oxygen via structural engineering

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 500, P. 157326 - 157326

Published: Nov. 1, 2024

Language: Английский

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Effect of cerium-zirconium oxide-loaded red mud on the selective catalytic reduction of NO in downhole diesel vehicle exhaust

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 125690 - 125690

Published: Jan. 1, 2025

Language: Английский

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Resolving NO-CO Competitive Adsorption in CO-SCR: The Role of Ni Doping in Mn-Ce Catalysts

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115568 - 115568

Published: Jan. 1, 2025

Language: Английский

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Denitrification Technology and The Catalysts: A Review and Recent Advances

ChemCatChem, Journal Year: 2024, Volume and Issue: 16(15)

Published: Jan. 22, 2024

Abstract With the acceleration of industrialization and increasing prominence environmental pollution problems, emission nitrogen oxides (NO x ) in atmosphere has become a global concern. These emissions are not only hazardous to human health, but also one main factors leading acid rain, photochemical smog climate change. Therefore, development implementation efficient denitrification technologies an important issue for protection. The present review focuses on research progress technology recent years, including traditional methods common technologies. At same time, advantages, limitations application prospects each method analyzed. mechanisms, influencing factors, advantages disadvantages catalysts discussed. In addition, future trends potential challenges It is expected that this will provide useful references promoting technology, which may help researchers choose high‐performance cost‐effective methods.

Language: Английский

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Pretreatment techniques in CO-SCR and NH3-SCR: Status, challenges, and perspectives

Journal of Catalysis, Journal Year: 2024, Volume and Issue: unknown, P. 115925 - 115925

Published: Dec. 1, 2024

Language: Английский

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Tailoring the Electronic Metal‐Support Interactions in Supported Silver Catalysts through Al modification for Efficient Ethylene Epoxidation

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(16)

Published: Feb. 23, 2024

Abstract Metal‐modified catalysts have attracted extraordinary research attention in heterogeneous catalysis due to their enhanced geometric and electronic structures outstanding catalytic performances. Silver (Ag) possesses necessary active sites for ethylene epoxidation, but the catalyst activity is usually sacrificed obtain high selectivity towards oxide (EO). Herein, we report that using Al can help tailoring unoccupied 3 d state of Ag on MnO 2 support through strong metal‐support interactions (EMSIs), overcoming activity‐selectivity trade‐off epoxidation resulting a very conversion rate (~100 %) with 90 % EO under mild conditions (170 °C atmospheric pressure). Structural characterization theoretical calculations revealed EMSIs obtained by modification tailor Ag, modulating adsorption (C H 4 ) oxygen (O facilitating desorption, C conversion. Meanwhile, increased number positively charge + lowers energy barrier 4(ads) oxidation produce oxametallacycle (OMC), inducing unexpectedly selectivity. Such an promotion provides new promising pathways designing advanced metal selective reactions.

Language: Английский

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Unravelling the Cu and Ce Effects in MnO2-Based Catalysts for Low-Temperature CO Oxidation

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(3), P. 166 - 166

Published: Jan. 22, 2025

Cu-containing and Ce-modified OMS-2 catalysts were prepared at various calcination temperatures using the hydrothermal method tested for low-temperature CO oxidation. The structure, chemical compositions, physical–chemical properties of characterized XRD, N2 physisorption, XRF, Raman spectroscopy, SEM, high-resolution TEM with EDX, TPR-H2, XPS. incorporation Cu into Ce-OMS-2 sample facilitated transformation pyrolusite cryptomelane, as confirmed by spectroscopy data. In light-off mode, Cu/Ce-OMS-2-300 Cu/OMS-2 samples exhibited higher activity in oxidation (T90 = 115 121 °C, respectively) compared to Cu/Ce-OMS-2-450. After a long-run stability test, Cu/Ce-OMS-X demonstrated excellent performance: T80 increased 16% 7% calcined 300 °C 450 respectively, while 40%. found have an content nanodispersed copper sites on their surfaces. These contributed formation Cu2+-O-Mn4+ interface, which is responsible presence Ce3+ catalyst was increase its water vapor due reoxidation ability comparison Ce-free Cu/OMS-2.

Language: Английский

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Effect of Cobalt Doping on the Catalytic Performance of Cryptomelane Catalyst for Co Preferential Oxidation in H2-Rich Streams

Published: Jan. 1, 2025

Language: Английский

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