Polymerization State of Vanadyl Species Affects the Catalytic Activity and Arsenic Resistance of the V₂O₅–WO₃/TiO₂ Catalyst in Multipollutant Control of NO_x and Chlorinated Aromatics

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(19), P. 7590 - 7598

Published: May 8, 2023

The conventional V2O5–WO3/TiO2 catalyst suffers severely from arsenic poisoning, leading to a significant loss of catalytic activity. doping Al or Mo plays an important role in promoting the resistance on NH3 selective reduction (NH3-SCR), but their promotion mechanism remains debate and has yet be explored multipollutant control (MPC) NOx chlorinated organics. Herein, our experimental characterizations density functional theory (DFT) calculations confirmed that species preferentially adsorb both form arsenate, thereby avoiding bonding catalytically active V sites. More importantly, partially converted polymeric vanadyl into monomeric ones, inhibiting near-surface bulk lattice oxygen mobility catalyst, while resulted polymerization with enriched V5+ chemical state exhibited superior MPC activity COx selectivity. Our work shows antipoisoning catalysts can designed combination site protection occurrence modification species.

Language: Английский

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Enhanced combustion of toluene on bimetallic-organic frameworks Fe-doped Mn2O3 nanoparticles

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 149589 - 149589

Published: Feb. 13, 2024

Language: Английский

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Tailoring valence state of V in V-Mo atomically dispersed ensemble enables exceptional NH4HSO4 poisoning resistance for NH3-SCR reaction

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 464, P. 142540 - 142540

Published: March 21, 2023

Language: Английский

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Support effects in vanadium incipient wetness impregnation for oxidative and non-oxidative propane dehydrogenation catalysis

Catalysis Today, Journal Year: 2024, Volume and Issue: 430, P. 114546 - 114546

Published: Jan. 22, 2024

Language: Английский

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Recent progress in the development of catalysts for propane dehydrogenation in the presence of CO₂

Reaction Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 9(6), P. 1292 - 1312

Published: Jan. 1, 2024

Propane dehydrogenation (PDH) has become an important strategy to address the ever-increasing global demand for propene.

Language: Английский

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Lewis acid-base modulation for efficient CO2 oxidative propane dehydrogenation: A case study of a La-modified binuclear Feoxo site

Chem Catalysis, Journal Year: 2023, Volume and Issue: 3(7), P. 100663 - 100663

Published: June 19, 2023

Language: Английский

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Role of oxygen transfer and surface reaction in catalytic performance of VO -Ce1–Zr O2 for propane dehydrogenation

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2023, Volume and Issue: 52, P. 217 - 227

Published: Sept. 1, 2023

Language: Английский

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The simultaneous elimination of NO and VOCs over industrial V-based catalytic filter: Reaction behaviors and catalyst structural evolutions

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(2), P. 111933 - 111933

Published: Jan. 19, 2024

Language: Английский

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Mass-Transfer Enhancement in the CO₂ Oxidative Dehydrogenation of Propane over GaN Supported on Zeolite Nanosheets with a Short b-Axis and Hierarchical Pores

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(13), P. 10376 - 10391

Published: June 25, 2024

The CO2 oxidative dehydrogenation of propane (CO2–ODHP) is a highly important reaction for not only producing large amounts propylene but also consuming the resource. GaN/zeolite catalysts deliver preferable activity in reaction. However, similar to Pt- and Cr-based catalysts, there are shortcomings such as poor stability coke accumulation, especially when operated at temperatures higher than 550 °C. Generally, carbon deposition one main reasons catalyst deactivation. limited mass transfer greatly aggravates deposited formation, since precursors could be removed time. In present work, we modified zeolites with short b-axis hierarchical pores, which offer shorter diffusion distance pore-rich structure enhance transfer. Thanks this enhancement, offers an initial conversion 68.0% yield 39.4% propylene, surpassing other reported data. Importantly, showed low loss rate amount carbon, was easily regenerated compared those without or pores. Density functional theory (DFT) calculations situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirmed that involves coupling direct reduction via reverse water–gas shift reaction, participates work sheds light on designing efficient CO2–ODHP transfer-boosted strategy and, importantly, expected provide inspiration constructing zeolite

Language: Английский

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Dynamic evolution of vanadia sites in dendritic mesoporous silica nanospheres for selective oxidation of methane to formaldehyde

Chemical Engineering Science, Journal Year: 2025, Volume and Issue: unknown, P. 121289 - 121289

Published: Feb. 1, 2025

Language: Английский

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