Mesoporous zeolite ZSM-5 confined Cu nanoclusters for efficient selective catalytic reduction of NOx by NH3

Yuanyuan, Sun; Li, Zhanyu; Zhou, Xiaoxia; Li, Guohui; Tan, Min; Ao, Shuang; Sun, Wei; Chen, Hangrong

doi:10.1016/j.apcatb.2024.123747

Cited by 8 publications

(1 citation statement)

References 43 publications

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“…In this context, the study indicated that Cu-ZSM-5 catalysts running at around 250 °C exhaust temperature were appropriate for this system. Furthermore, the Cu-ZSM-5 catalyst is the most often employed due to its low-temperature denitration capability (Yuanyuan et al 2024 ). Additionally, the usage of this catalyst in increasing exhaust temperatures and varied engine types is seen as significant.…”

Section: Resultsmentioning

confidence: 99%

Reduction of the harmful NOx pollutants emitted from the ship engines using high-pressure selective catalytic reduction system

Bayramoğlu,

Yılmaz,

Nuran

2024

Environ Sci Pollut Res

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Various techniques are used to reduce harmful pollutants such as NOX emissions from ships. Selective catalyst reduction (SCR) systems are the most effective technique used to reduce NOX emissions. In this study, the effects of an SCR reactor on NOX emissions and performance in high-pressure selective catalytic reduction (HP-SCR) systems were investigated numerically. In numerical studies, the effects of SCR system diameter, output form, catalyst activation energy, mixing zone length, and location were investigated as parametric, and the most suitable system geometry was determined. The effects of geometric parameters and catalyst type on emission and performance such as NOX reduction, NH3 slip, velocity, and pressure loss were investigated. It was determined that with increasing system diameter, whereas the NOX reduction performance increased depending on exhaust velocity, the pressure drop decreased, and the most suitable system diameter was determined as 780 mm. Furthermore, the obtained results showed that the performance of NOX reduction decreased after 2 × 106 kJ/kmol activation energy, and the most suitable SCR output form was conical geometry. In terms of the environment, this study will contribute to achieving the UN Sustainable Development Goals such as climate action (SDG 13).

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Section: Resultsmentioning

confidence: 99%

Reduction of the harmful NOx pollutants emitted from the ship engines using high-pressure selective catalytic reduction system

Bayramoğlu,

Yılmaz,

Nuran

2024

Environ Sci Pollut Res

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On “Storage‐Oxidation” Cycling Removal of BTX Over Zeolite Composites

Liu,

Wang,

Zhang

et al. 2024

ChemCatChem

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The “storage‐oxidation” cycle is an energy‐efficient process for removing low‐concentration volatile organic compounds (VOCs). However, due to the weak interaction between BTX compounds (benzene, toluene, and xylene) and commonly used adsorbent materials, how to prevent the BTX escape prior to oxidation remains a challenge. In this work, a comprehensive study on the critical factors influencing on the “storage‐oxidation” cycling removal of BTX are investigated. The study elucidated the relationship between different zeolites and their capacity for storing BTX. It was found that the adsorption of BTX onto various zeolites is greatly impacted by the pore size of the zeolite and the volatility of BTX. Particularly, toluene and/or m‐xylene could be preferential adsorbed by Cu2+ located on the ion‐exchange sites, forming strong bonding interactions that facilitating the in‐situ thermal regeneration. Furthermore, the experimental results suggest that a synergy between Cu2+ and CuO could accelerate the catalytic oxidation of BTX. These findings offer valuable insights for designing bifunctional catalysts for the “storage‐oxidation” cycling removal of BTX.

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Copper Nanoclusters Imparted Metalloporphyrin Based Metal‐Organic Frameworks for Enhanced CO₂ Electroreduction

Wang,

Feng,

Rong

et al. 2024

Chemistry A European J

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Strategies that can introduce catalytic auxiliary into electrocatalysts to boost the performance of electrocatalytic CO2 reduction reaction (CO2RR) are meaningful in exploring hybrid electrocatalytic systems. Here, a series of hybrid elelctrocatalysts (Cu NCs@MOF‐545‐M, M = Fe, Co and Ni) have been prepared by assembly Cu NCs with MOF‐545‐M (M = Fe, Co and Ni) and successfully applied in electrocatalytic CO2RR. In the obtained MOF‐545‐M (M = Fe, Co and Ni), the integration of Cu NCs with MOF‐545‐M (M = Fe, Co and Ni) can create a hybrid electrocatalytic system that enhances the charge transfer efficiency and electrocatalytic CO2RR activity. Specifically, the optimal Cu NCs@MOF‐545‐Co achieves high FECO (100%), CO generation rate (10.9 mol m‐2 h‐1) and energy efficiency (69%), which is superior to Cu NCs and MOF‐545‐Co, and represented to be one of the best performances to date. This work demonstrates a facile approach to significantly improve the FECO by loading metal nanoclusters into MOFs, providing a valuable reference for future studies on hybridization strategies to enhance the performance of electrocatalysts.

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Mesoporous zeolite ZSM-5 confined Cu nanoclusters for efficient selective catalytic reduction of NOx by NH3

Cited by 8 publications

References 43 publications

Reduction of the harmful NOx pollutants emitted from the ship engines using high-pressure selective catalytic reduction system

Reduction of the harmful NOx pollutants emitted from the ship engines using high-pressure selective catalytic reduction system

On “Storage‐Oxidation” Cycling Removal of BTX Over Zeolite Composites

Copper Nanoclusters Imparted Metalloporphyrin Based Metal‐Organic Frameworks for Enhanced CO₂ Electroreduction

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Mesoporous zeolite ZSM-5 confined Cu nanoclusters for efficient selective catalytic reduction of NOx by NH3

Cited by 8 publications

References 43 publications

Reduction of the harmful NOx pollutants emitted from the ship engines using high-pressure selective catalytic reduction system

Reduction of the harmful NOx pollutants emitted from the ship engines using high-pressure selective catalytic reduction system

On “Storage‐Oxidation” Cycling Removal of BTX Over Zeolite Composites

Copper Nanoclusters Imparted Metalloporphyrin Based Metal‐Organic Frameworks for Enhanced CO2 Electroreduction

Contact Info

Product

Resources

About

Copper Nanoclusters Imparted Metalloporphyrin Based Metal‐Organic Frameworks for Enhanced CO₂ Electroreduction