A review on exhaust gas after-treatment of lean-burn natural gas engines – From fundamentals to application

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 340, P. 123241 - 123241

Published: Aug. 30, 2023

Modern lean-operated internal combustion engines running on natural gas, biogas, or methane produced from wind solar energy are highly fuel-efficient and can greatly contribute to securing supply, e.g. by mitigating fluctuations in the power grid. Although only comparably low emission levels form during combustion, a optimized control system is required that converts pollutants over wide range of operation conditions. In this context, review article pinpoints main challenges formaldehyde oxidation as well selective catalytic reduction nitric oxides. The impact catalyst formulation conditions activity selectivity combination several technologies for abatement critically discussed. Additionally, recent experimental theory-based progress developments assessed, allowing coverage all time length scales relevant control, i.e. ranging mechanistic fundamental insights including atomic-level phenomena full-scale applications.

Language: Английский

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Progress in palladium-based bimetallic catalysts for lean methane combustion: Towards harsh industrial applications

The Innovation Materials, Journal Year: 2025, Volume and Issue: unknown, P. 100116 - 100116

Published: Jan. 1, 2025

<p>Significant volumes of lean methane (0.1–1.0 vol%) are released untreated into the atmosphere during industrial operations, contributing to greenhouse effect and energy wastage. Catalytic combustion presents a promising avenue mitigate these emissions. Depending on their active components, catalytic systems predominantly categorized noble metal-based non-noble catalysts, with palladium (Pd)-based catalysts recognized for superior low-temperature oxidation activity. Nevertheless, enhancing thermal stability Pd remains challenging, complicated by impurities such as H₂O, SO₂ H₂S in stream, which can cause catalyst poisoning deactivation. Recent research has focused design Pd-based bimetallic offering improved stability, activity, resistance harsh conditions. This review examines advancements improving deactivation combustion, covering site characterization, dispersion metal-support interactions, role auxiliary metals, structural modulation strategies. It also investigates impact environments performance, focusing mechanisms mitigation Ultimately, this identifies current trends challenges demanding applications. By providing insights enhanced poisoning, aims guide development that meet demands.</p>

Language: Английский

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Recent advances in electrochemical non-enzymatic glucose sensor for the detection of glucose in tears and saliva: A Review

Sensors and Actuators A Physical, Journal Year: 2023, Volume and Issue: 363, P. 114778 - 114778

Published: Oct. 30, 2023

Language: Английский

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Visible-light induced direct C(sp³)–H functionalization: recent advances and future prospects

Organic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(18), P. 5278 - 5305

Published: Jan. 1, 2024

This review summarizes the latest methodological advances in photocatalytic C(sp 3 )–H functionalization, with a particular emphasis on formation of C–P, C–B, C–S bonds, etc ., and some prominent efforts asymmetric C–H functionalization.

Language: Английский

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Electrocatalytic methane conversion via in-situ generated superoxide radicals in an aprotic ionic liquid

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 684, P. 449 - 456

Published: Jan. 9, 2025

Language: Английский

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Current Progress on Methods and Technologies for Catalytic Methane Activation at Low Temperatures

Advanced Science, Journal Year: 2022, Volume and Issue: 10(5)

Published: Dec. 11, 2022

Methane (CH

Language: Английский

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Methane Combustion over the Porous Oxides and Supported Noble Metal Catalysts

Catalysts, Journal Year: 2023, Volume and Issue: 13(2), P. 427 - 427

Published: Feb. 16, 2023

Methane is the most stable hydrocarbon with a regular tetrahedral structure, which can be activated and oxidized above 1000 °C in conventional combustion. Catalytic oxidation an effective way to eliminate lean methane under mild conditions, key issue develop catalysts high efficiencies, good stability, selectivities. combustion of low-concentration realize light-off deep conversion at low temperatures, thus achieving complete fewer byproducts below 500 °C. This review article summarizes recent advances preparation ordered porous oxides supported noble metal their applications. The results reveal that superior performance (good hydrothermal stability excellent moisture- or sulfur-resistant behavior) associated well-ordered developed three-dimensional large surface area, ultrahigh component dispersion, fast mass transfer, low-temperature reducibility, reactant activation ability, strong interaction between support. In addition, development trend for industrial applications future also proposed.

Language: Английский

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Non-thermal plasma enhanced catalytic conversion of methane into value added chemicals and fuels

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 97, P. 265 - 301

Published: May 27, 2024

Language: Английский

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Boosting Reactive Oxygen Species Formation Over Pd and VO_δ Co‐Modified TiO₂ for Methane Oxidation into Valuable Oxygenates

Small, Journal Year: 2024, Volume and Issue: 20(29)

Published: Feb. 16, 2024

Direct photocatalytic methane oxidation into value-added products provides a promising strategy for utilization. However, the inefficient generation of reactive oxygen species (ROS) partly limits activation CH

Language: Английский

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Spatiotemporal insights into forced dynamic reactor operation for fast light-off of Pd-based methane oxidation catalysts

Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(15), P. 4142 - 4153

Published: Jan. 1, 2024

Spatial profiling uncovers axial gradients in a monolithic methane oxidation catalyst during dynamic operation, which enables substantial activity enhancement.

Language: Английский

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