☆ 4.7 Article

Exploring the effect of calcination temperature and sulphuric acid impregnation treatment on the NH3-SCR activity of cold-rolled sludge

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2022)

Related references

Note: Only part of the references are listed.

Article Environmental Sciences

Unraveling SO2-tolerant mechanism over Fe2(SO4)3/TiO2 catalysts for NO . reduction

Chong Feng et al.

Summary: Developing low-temperature SO2-tolerant catalysts for the selective catalytic reduction of NOx remains a challenging task. Metal sulfate catalysts have attracted attention due to their good catalytic activity and high-temperature SO2 tolerance, but the mechanism of SO2 tolerance in metal sulfate catalysts is still unclear.

JOURNAL OF ENVIRONMENTAL SCIENCES (2022)

Add to Collection

Article Engineering, Environmental

Electrothermal alloy embedded V2O5-WO3/TiO2 catalyst for NH3-SCR with promising wide operating temperature window

Wei Li et al.

Summary: In this study, a catalyst embedded with electrothermal alloy was prepared to widen the operating temperature window of the V2O5-WO3/TiO2 catalyst. The experimental results showed that the electrothermal alloy embedded catalyst maintained superior NH3-SCR performance and high resistance to H2O in a wide temperature range. Additionally, the NH4HSO4 poisoned catalyst could be efficiently regenerated through electric heating.

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2022)

Add to Collection

Article Engineering, Environmental

Improving the K resistance effectively of CeO2-TiO2 catalyst by Nb doping for NH3-SCR reaction

Ye Jiang et al.

Summary: The role of Nb doping in improving the anti-K poisoning ability of CeO2-TiO2 catalyst was investigated in this study. It was found that the Nb-modified catalyst exhibited significantly enhanced catalytic activity in the presence of K. The doping of Nb improved the BET surface area and reduced the surface crystallinity of the catalyst. In addition, the Nb-modified catalyst showed a smaller decrease in the ratio of Ce3+/Ce4+, surface chemisorbed oxygen, Bronsted acidity, and redox property in the presence of K. The results of in situ DRIFTs indicated that the reactions on both fresh and K-poisoned catalysts were controlled by combined E-R and L-H mechanisms. The addition of Nb enhanced the adsorption of NO and NH3, contributing to the improved K-poisoning resistance of CeO2-TiO2.

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2022)

Add to Collection

Article Engineering, Environmental

Excellent sulfur tolerance performance over Fe-SO4/TiO2 catalysts for NH3-SCR: Influence of sulfation and Fe-based sulfates

De Fang et al.

Summary: Fe-SO4/TiO2 catalysts show different performances at high and low temperatures. The 20%Fe-SO4/TiO2 catalyst exhibits excellent sulfur tolerance.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

Add to Collection

Article Engineering, Chemical

Significantly Enhanced Catalytic Performance of Fe2(SO4)3/CeO2 Catalyst for the Selective Catalytic Reduction of NOx by NH3

Zizheng Zhou et al.

Summary: Fe-2(SO4)(3)/CeO2 composite oxide catalysts showed higher activity and enhanced N-2 selectivity compared to CeO2 and Fe-2(SO4)(3) catalysts, attributed to enhanced reducibility and surface acidity. Synergistic effect among Fe, Ce, and SO42- contributed to the improved NH3-SCR catalytic performance.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2021)

Add to Collection

Article Engineering, Environmental

Catalytic performance and mechanistic evaluation of sulfated CeO2 cubes for selective catalytic reduction of NOx with ammonia

Renyi Xie et al.

Summary: Sulfated CeO2 cubes exhibited improved catalytic performance in NH3-SCR due to the increased Bronsted acid sites created by surface sulfates, which facilitated ammonia adsorption and activation. The presence of sulfates on CeO2 cubes did not significantly alter the crystal structures, and gaseous phase NO was identified as the rate-determining step in the SCR reaction over sulfated CeO2 cubes.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Add to Collection

Article Engineering, Environmental

Enhanced sulfur resistance of H3PW12O40-modified Fe2O3 catalyst for NH3-SCR: Synergistic effect of surface acidity and oxidation ability

Jiahui Wu et al.

Summary: The HPW-modified Fe2O3 catalysts exhibit excellent performance in the selective catalytic reduction of NOx by NH3, with high NO conversion rates and outstanding SO2 resistance. The increase in acid sites after HPW modification promotes NH3 adsorption and decreases the oxidation ability, effectively inhibiting overoxidation of NH3.

CHEMICAL ENGINEERING JOURNAL (2021)

Add to Collection

Article Chemistry, Physical

Activating low-temperature NH3-SCR catalyst by breaking the strong interface between acid and redox sites: A case of model Ce2(SO4)3-CeO2 study

Jiawei Ji et al.

Summary: The study investigates the impact of acid-redox interaction on NH3-SCR performance using three different types of Ce-2(SO4)(3)-CeO2 model catalysts. It is found that the electron-withdrawing effect from sulfate significantly disturbs the redox property, while the introduction of Ce-2(SO4)(3) retards oxygen vacancy formation over CeO2. The weakened acid-redox interaction changes the nature of surface NOx species and promotes surface reaction via Langmuir-Hinshelwood mechanism, ultimately affecting the overall NH3-SCR performance.

JOURNAL OF CATALYSIS (2021)

Add to Collection

Article Engineering, Environmental

Reaction Pathways of the Selective Catalytic Reduction of NO with NH3 on the α-Fe2O3(012) Surface: a Combined Experimental and DFT Study

Meng Gao et al.

Summary: This study elucidates the NH3-SCR reaction pathways on the alpha-Fe2O3 (012) surface at the atomic level through density functional theory calculations and experimental measurements. The activation of NO and the formation of the NH2NO intermediate are identified as the rate-determining steps in the complete SCR cycle.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Add to Collection

Article Engineering, Environmental

Revealing the effect of paired redox-acid sites on metal oxide catalysts for efficient NOx removal by NH3-SCR

Wei Tan et al.

Summary: The study revealed that the NH3-SCR activity of Nb2O5-CeO2 and WO3-CeO2 catalysts depends significantly on the strong interaction between the redox component (CeO2) and acidic component (Nb2O5 or WO3), as well as the presence of paired redox-acid sites. At lower temperatures (200 degrees Celsius), NH3-SCR activity is primarily influenced by the surface acidity of the catalysts, while at higher NOx conversion rates, the activity is more determined by the redox properties.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Add to Collection

Article Engineering, Environmental

Insights into the co-doping effect of Fe3+ and Zr4+ on the anti-K performance of CeTiOx catalyst for NH3-SCR reaction

Keke Kang et al.

Summary: A novel K-resistant Fe3+ and Zr4+ co-doped CeTiOx catalyst was prepared for NH3-SCR of NOx, showing superior K-resistance and improved activity after K-poisoning. The proposed anti-K poisoning mechanism involves sacrificial Fe and Zr forming protective species, as well as additional reducibility and surface acidity enhancing distribution.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Add to Collection

Article Engineering, Environmental

Support promotion effect on the SO2 and K+ co-poisoning resistance of MnO2/TiO2 for NH3-SCR of NO

Lu Wei et al.

Summary: According to the study, Mn-based catalysts with SO2&K co-poisoning exhibit higher SCR activity than catalysts poisoned by SO2 or K individually. The majority of K adsorbed on the support leads to increased alkalinity, promoting the adsorption of SO2 and reducing the toxicity of the active component.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Add to Collection

Article Engineering, Environmental

Promotion of NH3-SCR activity by sulfate-modification over mesoporous Fe doped CeO2 catalyst: Structure and mechanism

Hui Wang et al.

Summary: The mesoporous Fe-doped CeO2 catalyst, modified with organic sulfate functional groups, exhibits excellent activity with over 80% NOx conversion in a temperature range of 250-450 degrees C. The strong electron interaction between Fe-O-Ce species and sulfate groups alters the acidity and redox properties of the catalyst, leading to the generation of new Brønsted acid sites and promoting NOx conversion.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Add to Collection

Article Chemistry, Physical

Structure-Activity Relationships of Hydrothermally Aged Titania-Supported Vanadium-Tungsten Oxide Catalysts for SCR of NOx Emissions with NH3

Jun-Kun Lai et al.

Summary: Supported V2O5-WO3/TiO2 materials are employed as SCR catalysts for NOx emission control. The surface WOx sites stabilize the TiO2 phase, while the surface VOx sites mainly exist as V-5+O-x sites. The concentration of surface NH3* species is lower in hydrothermally treated catalysts, but SCR activity is comparable to calcined catalysts.

ACS CATALYSIS (2021)

Add to Collection

Article Chemistry, Physical

Regulating oxygen activity of perovskites to promote NOx oxidation and reduction kinetics

Jonathan Hwang et al.

Summary: Understanding the adsorption and oxidation of NO on metal oxides is an important topic in environmental and atmospheric chemistry. Surface oxygen activity on La1-xSrxCoO3 perovskites dictates the adsorption and oxidation kinetics of NO, with increasing surface oxygen activity leading to stronger adsorption and oxidation kinetics, but too strong NO adsorption can poison surface oxygen sites.

NATURE CATALYSIS (2021)

Add to Collection

Article Engineering, Environmental

Unraveling the Unexpected Offset Effects of Cd and SO2 Deactivation over CeO2-WO3/TiO2 Catalysts for NOx Reduction

Lijun Yan et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2020)

Add to Collection

Article Environmental Sciences

Effects of calcination temperature on physicochemical property and activity of CuSO4/TiO2 ammonia-selective catalytic reduction catalysts

Yanke Yu et al.

JOURNAL OF ENVIRONMENTAL SCIENCES (2020)

Add to Collection

Article Chemistry, Multidisciplinary

FeCeOx with improved activity for catalytic reduction of NO with NH3

Li Wang et al.

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS (2020)

Add to Collection

Article Engineering, Environmental

Enhancing the K resistance of CeTiOx catalyst in NH3-SCR reaction by CuO modification

Keke Kang et al.

JOURNAL OF HAZARDOUS MATERIALS (2020)

Add to Collection

Article Engineering, Environmental

SO2 promoted in situ recovery of thermally deactivated Fe2(SO4)3/TiO2 NH3-SCR catalysts: From experimental work to theoretical study

Yanke Yu et al.

CHEMICAL ENGINEERING JOURNAL (2019)

Add to Collection

Article Engineering, Environmental

Tourmaline-Modified FeMnTiOx Catalysts for Improved Low-Temperature NH3-SCR Performance

Fei Wang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2019)

Add to Collection

Article Chemistry, Physical

Shape dependence and sulfate promotion of CeO2 for selective catalytic reduction of NOx with NH3

Lei Ma et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2018)

Add to Collection

Article Engineering, Environmental

Mechanistic aspects of NH3-SCR reaction over CeO2/TiO2-ZrO2-SO42- catalyst: In situ DRIFTS investigation

Jie Fan et al.

CHEMICAL ENGINEERING JOURNAL (2018)

Add to Collection

Article Engineering, Environmental

New Insight into SO2 Poisoning and Regeneration of CeO2-WO3/TiO2 and V2O5-WO3/TiO2 Catalysts for Low-Temperature NH3-SCR

Liwen Xu et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2018)

Add to Collection

Article Chemistry, Multidisciplinary

Selective catalytic reduction of NOx with NH3 over titanium modified FexMgyOz catalysts: Performance and characterization

Liting Xu et al.

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY (2018)

Add to Collection

Article Chemistry, Physical

Structure-Activity Relationship Study of Mn/Fe Ratio Effects on Mn-Fe-Ce-Ox/γ-Al2O3 Nanocatalyst for NO Oxidation and Fast SCR Reaction

Yan Gao et al.

CATALYSTS (2018)

Add to Collection

Article Chemistry, Physical

A neutral and coordination regeneration method of Ca-poisoned V2O5-WO3/TiO2 SCR catalyst

Xiansheng Li et al.

CATALYSIS COMMUNICATIONS (2017)

Add to Collection

Article Engineering, Environmental

Construction of LaFe1-xMnxO3/attapulgite nanocomposite for photo-SCR of NOx at low temperature

Xiazhang Li et al.

CHEMICAL ENGINEERING JOURNAL (2017)

Add to Collection

Article Chemistry, Physical

Improvement in activity and alkali resistance of a novel V-Ce(SO4)2/Ti catalyst for selective catalytic reduction of NO with NH3

Wenshuo Hu et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2017)

Add to Collection

Article Chemistry, Physical

Insight into the mesoporous FexCe1-xO2-δ catalysts for selective catalytic reduction of NO with NH3: Regulable structure and activity

Hui Wang et al.

JOURNAL OF CATALYSIS (2016)

Add to Collection

Article Chemistry, Physical

Novel manganese oxide confined interweaved titania nanotubes for the low-temperature Selective Catalytic Reduction (SCR) of NOx by NH3

Dimitrios K. Pappas et al.

JOURNAL OF CATALYSIS (2016)

Add to Collection

Article Chemistry, Physical

Formation of reactive Lewis acid sites on Fe/WO3-ZrO2 catalysts for higher temperature SCR applications

Rodney Foo et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2015)

Add to Collection

Article Mineralogy

The crystal structure of sarmientite, Fe23+(AsO4)(SO4)(OH)•5H2O, solved ab initio from laboratory powder diffraction data

F. Colombo et al.

MINERALOGICAL MAGAZINE (2014)

Add to Collection

Article Spectroscopy

Characterization of the sulphate mineral amarantite - Fe23+(SO4)O•7H2O using infrared, Raman spectroscopy and thermogravimetry

Ray L. Frost et al.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2013)

Add to Collection

Article Chemistry, Physical

Catalytic Performance, Characterization, and Mechanism Study of Fe2(SO4)3/TiO2 Catalyst for Selective Catalytic Reduction of NOx by Ammonia

Lei Ma et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2011)

Add to Collection

Article Chemistry, Physical

The influence of the preparation method on the structural, acidic and redox properties of V2O5-TiO2/SO42- catalysts

H. Zhao et al.

APPLIED CATALYSIS A-GENERAL (2009)

Add to Collection

Article Chemistry, Physical

MnOx-CeO2 mixed oxides prepared by co-precipitation for selective catalytic reduction of NO with NH3 at low temperatures

GS Qi et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2004)

Add to Collection

Article Chemistry, Physical

Reaction mechanism of selective catalytic reduction of NO with NH3 over Fe-ZSM-5 catalyst

RQ Long et al.

JOURNAL OF CATALYSIS (2002)

Add to Collection

Article Chemistry, Physical

Environmental catalysis on iron oxide-silica aerogels:: Selective oxidation of NH3 and reduction of NO by NH3

P Fabrizioli et al.

JOURNAL OF CATALYSIS (2002)

Add to Collection

© Peeref 2019-2024. All rights reserved.