4.7 Article

Synergistic effect of copper and vanadium species on Hg0 removal of Cu-SCR catalyst: A DFT and experimental study

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Engineering, Environmental

A kinetic study of Hg(0) oxidation over Mo-promoted V-based SCR catalyst

Can Li et al.

Summary: In this study, the impact of HCl and NH3 on Hg(0) oxidation catalytic reaction was investigated through real-time Hg(0) oxidation experiment and X-ray Absorption Near-Edge Structure analysis. The research revealed that Hg(0) oxidation is influenced by the combined action of HCl and O-2. HgCl2 was identified as the major mercury species formed on the spent catalyst under typical flue gas conditions.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Chemistry, Multidisciplinary

A Sulfur-Tolerant MOF-Based Single-Atom Fe Catalyst for Efficient Oxidation of NO and Hg0

Weijie Yang et al.

Summary: A new single-atom catalyst Fe-1-N-4-C with excellent catalytic activity and sulfur resistance has been developed for the oxidation of NO and Hg-0, showing promising potential for cleaner coal-fired power plant operations.

ADVANCED MATERIALS (2022)

Article Engineering, Environmental

Structure-Directing Role of Support on Hg-0 Oxidation over V2O5/TiO2 Catalyst Revealed for NOx and Hg-0 Simultaneous Control in an SCR Reactor

Jianqiang Shi et al.

Summary: The crystal structure of TiO2 significantly affects the catalytic performance of supported active sites. In this study, different crystal forms of TiO2 were synthesized and used as supports for V2O5-based catalysts for Hg-0 oxidation. The results showed that V2O5/TiO2-B exhibited the highest Hg-0 oxidation efficiency due to its lower redox temperature, larger HCl adsorption capacity, and more oxygen vacancies. The study also suggested that a combination of anatase and brookite TiO2-supported vanadyl tandem catalysts should be employed in the SCR reactor for simultaneous removal of NOx and Hg-0.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Review Engineering, Environmental

Mercury removal using various modified V/Ti-based SCR catalysts: A review

Jiancheng Yang et al.

Summary: This article reviews many modification experiments on V/Ti catalysts, including studies on the performance and mercury removal mechanisms of these catalysts, aiming to guide future improvements.

JOURNAL OF HAZARDOUS MATERIALS (2022)

Article Environmental Sciences

Sediment records of global and regional Hg emissions to the atmosphere in North China over the last three centuries

Dejun Wan et al.

Summary: This study reconstructs the historical atmospheric mercury levels in southeastern Inner Mongolia, China, over the past three centuries and reveals its relationship with global and regional mercury emissions. The research shows that the region had little mercury pollution in the 18th and 19th centuries, but it has gradually increased since the 1900s, primarily due to emissions from the former Soviet Union and the Beijing-Tianjin-Hebei region. Furthermore, the study highlights that despite stable or decreasing mercury emissions in China over the past decade, atmospheric mercury levels continue to rise.

ENVIRONMENTAL POLLUTION (2022)

Review Environmental Sciences

Mercury transformation processes in nature: Critical knowledge gaps and perspectives for moving forward

Zhiyuan Gao et al.

Summary: This article discusses the importance of the transformation of mercury in the environment for the ecosystem and human health. It provides a critical analysis of the current knowledge gaps in understanding these processes and explores future avenues for improving our understanding.

JOURNAL OF ENVIRONMENTAL SCIENCES (2022)

Article Chemistry, Physical

Ternary MnCoVOx catalysts with remarkable deNOx performance: Dual acid-redox sites control strategy

Yonglong Li et al.

Summary: This study designs a series of ternary metal oxide catalysts with outstanding denitration performance through a dual acid-redox sites tuning strategy and achieves efficient conversion of NOx and sulfur resistance over a wide temperature range.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Chemistry, Physical

Insight into the activity and SO2 tolerance of hierarchically ordered MnFe1-δCoδOx ternary oxides for low-temperature selective catalytic reduction of NOx with NH3

Yonglong Li et al.

Summary: In this study, Co-doped MnFeOx ternary mixed oxides with hierarchically ordered structure exhibited enhanced low-temperature activity, broadened temperature window, improved water resistance, and enhanced SO2 and soot tolerance for NH3-SCR of NOx. The enhanced performance was attributed to the presence of active oxygen species, higher content of Mn4+, Fe3+, and Co3+, and improved surface acidity, which facilitated the adsorption and activation of NO and NH3, making it a promising candidate for low-temperature deNOx application.

JOURNAL OF CATALYSIS (2021)

Article Energy & Fuels

Single-atom iron as a promising low-temperature catalyst for selective catalytic reduction of NOx with NH3: A theoretical prediction

Weijie Yang et al.

Summary: This study proposes a novel low-temperature NH3-SCR catalyst using Fe1-N4, revealing its reaction mechanism through density functional theory calculations and microkinetic modeling. The Fe1-N4 catalyst shows outstanding deNOx performance in a temperature window below 430K, with fast NO oxidation promoting the rate of NH3-SCR reaction.
Article Energy & Fuels

Molecular study of heterogeneous mercury conversion mechanism over Cu-MOFs: Oxidation pathway and effect of halogen

Zhen Zhang et al.

Summary: Copper-based metal-organic frameworks are a new type of porous sorbent for efficient removal of mercury species in flue gas. Chemical adsorption mechanism dominates the adsorption processes, while halogen activation assists in mercury oxidation and removal.
Article Chemistry, Physical

Structure-activity relationship of VOx/TiO2 catalysts for mercury oxidation: A DFT study

Dongjae Shin et al.

Summary: By utilizing density functional theory calculations, the study demonstrates the relationship between the coordinative environment of V in the VOx/TiO2 catalyst and the catalytic activity towards Hg-0 oxidation, as well as the effect of hydroxylation. Mechanistic estimation of the Hg-0 oxidation activity and calculation of the thermodynamic stabilities of the catalyst models suggest thermodynamic conditions that favor high catalytic activity.

APPLIED SURFACE SCIENCE (2021)

Article Engineering, Environmental

ZSM-5-supported V-Cu bimetallic oxide catalyst for remarkable catalytic oxidation of toluene in coal-fired flue gas

Jianhan Li et al.

Summary: This study utilized a V-Cu bimetallic bifunctional catalyst VCu/ZSM-5 to efficiently remove VOCs and tolerate complex flue gas, with the catalytic material easily fabricated via the impregnation method. The enhanced performance of the V-Cu/ZSM-5 catalyst was attributed to improved reducibility at lower temperatures, higher electron transfer efficiency, more abundant O alpha species, and lower C7H8 activation temperature, providing insights for removing VOCs from complex coal-fired flue gas.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Energy & Fuels

Effects of HCl and O2 on Hg0 Oxidation in the SCR Catalyst

Xiaoyang Zhang et al.

Summary: Selective catalytic oxidation of elemental mercury during the SCR process, combined with desulfurization scrubbing, shows promise for removing mercury from coal-fired flue gas. The effects of HCl and O-2 on the SCR catalyst for Hg-0 oxidation require further investigation. The synergistic effects of O-2 and HCl on Hg-0 oxidation were evident, with corresponding removal efficiencies of 39.12 and 31.69% at 200 and 350 degrees C, respectively.

ENERGY & FUELS (2021)

Article Chemistry, Physical

The effect of SO2 on NH3-SCO and SCR properties over Cu/SCR catalyst

Chuanmin Chen et al.

APPLIED SURFACE SCIENCE (2020)

Article Chemistry, Applied

Identifying the presence of [V = O]2+ during SCR using in-situ Raman and UV Vis spectroscopy

Anita L. Godiksen et al.

CATALYSIS TODAY (2019)

Article Energy & Fuels

Gaseous Mercury Capture by Copper-Activated Nanoporous Carbon Nitride

Dongjing Liu et al.

ENERGY & FUELS (2018)

Article Chemistry, Multidisciplinary

Catalytic performance of CuCl2-modified V2O5-WO3/TiO2 catalyst for Hg0 oxidation in simulated flue gas

Chuanmin Chen et al.

KOREAN JOURNAL OF CHEMICAL ENGINEERING (2018)

Article Chemistry, Applied

SCR catalyst doped with copper for synergistic removal of slip ammonia and elemental mercury

Chuanmin Chen et al.

FUEL PROCESSING TECHNOLOGY (2018)

Article Chemistry, Physical

A DFT study of the Hg0 oxidation mechanism on the V2O5-TiO2 (001) surface

Yangyan Gao et al.

MOLECULAR CATALYSIS (2017)

Article Engineering, Environmental

Mercury oxidation in catalysts used for selective reduction of NOx (SCR) in oxy-fuel combustion

Nuria Fernandez-Miranda et al.

CHEMICAL ENGINEERING JOURNAL (2016)

Article Engineering, Chemical

Cerium-Stabilized Cu-SSZ-13 Catalyst for the Catalytic Removal of NOx by NH3

Jiancheng Wang et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2016)

Article Chemistry, Physical

Low Valence Cation Doping of Bulk Cr2O3: Charge Compensation and Oxygen Vacancy Formation

John J. Carey et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2016)

Article Engineering, Environmental

Elemental mercury oxidation and adsorption on magnesite powder modified by Mn at low temperature

Yalin Xu et al.

JOURNAL OF HAZARDOUS MATERIALS (2015)

Article Thermodynamics

A CuO-V2O5/TiO2 CATALYST FOR THE SELECTIVE CATALYTIC REDUCTION OF NO WITH NH3

Lemeng Yu et al.

COMBUSTION SCIENCE AND TECHNOLOGY (2015)

Article Engineering, Environmental

Density functional theory study of mercury adsorption and oxidation on CuO(111) surface

Shujuan Sun et al.

CHEMICAL ENGINEERING JOURNAL (2014)

Article Engineering, Environmental

CuO/TiO2 catalysts for gas-phase Hg0 catalytic oxidation

Wenqing Xu et al.

CHEMICAL ENGINEERING JOURNAL (2014)

Article Chemistry, Physical

DFT Study of Hg Oxidation across Vanadia-Titania SCR Catalyst under Flue Gas Conditions

Ana Suarez Negreira et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2013)

Article Chemistry, Physical

Role of WO3 in the Hg Oxidation across the V2O5-WO3-TiO2 SCR Catalyst: A DFT Study

Ana Suarez Negreira et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2013)

Proceedings Paper Chemistry, Inorganic & Nuclear

Possibility of VOx/SiO2 complexes speciation: comparative multi-wavelength Raman and DR UV-vis study

Roman Bulanek et al.

10TH INTERNATIONAL CONFERENCE ON SOLID STATE CHEMISTRY (2013)

Article Engineering, Environmental

The adsorption mechanism of elemental mercury on CuO (110) surface

Wenjuan Xiang et al.

CHEMICAL ENGINEERING JOURNAL (2012)

Article Engineering, Environmental

Role of flue gas components in mercury oxidation over TiO2 supported MnOx-CeO2 mixed-oxide at low temperature

Hailong Li et al.

JOURNAL OF HAZARDOUS MATERIALS (2012)

Article Physics, Condensed Matter

Charge compensation in trivalent cation doped bulk rutile TiO2

Anna Iwaszuk et al.

JOURNAL OF PHYSICS-CONDENSED MATTER (2011)

Article Engineering, Chemical

Mercury oxidation by copper oxides in combustion flue gases

Akimasa Yamaguchi et al.

POWDER TECHNOLOGY (2008)

Article Chemistry, Physical

Heterogeneous mercury reaction on a selective catalytic reduction (SCR) catalyst

Yujin Eom et al.

CATALYSIS LETTERS (2008)

Article Chemistry, Physical

Manganese oxide catalysts for NOx reduction with NH3 at low temperatures

Min Kang et al.

APPLIED CATALYSIS A-GENERAL (2007)

Article Engineering, Environmental

XAS and XPS characterization of mercury binding on brominated activated carbon

Nick D. Hutson et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2007)

Article Engineering, Chemical

Novel sorbents for mercury removal from flue gas

EJ Granite et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2000)