Insight into the mechanisms of activity promotion and SO2 resistance over Fe-doped Ce-W oxide catalyst for NOx reduction

Article Chemistry, Physical

Effects of SO2 on standard and fast SCR over CeWOx: A quantitative study of the reaction pathway and active sites

Yanlong Huo et al.

Summary: The presence of SO₂ has less severe negative effects on the fast SCR process compared to standard SCR. SO₂ inhibits NO adsorption and the nitrite path, leading to decreased SCR activity, especially at low temperatures.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

添加到收藏夹

Article Chemistry, Physical

Effects of sulfation on hematite for selective catalytic reduction of nitrogen oxides with ammonia

Yu Zhang et al.

Summary: In this study, the activity and selectivity of hematite were improved via surface sulfation, with moderate sulfate species enhancing activity while excessive sulfates decreasing it, ultimately inhibiting the Langmuir-Hinshelwood mechanism in NH3-SCR reactions.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

添加到收藏夹

Article Chemistry, Physical

Insight into the promoting effect of support pretreatment with sulfate acid on selective catalytic reduction performance of CeO2/ZrO2 catalysts

Zhitao Han et al.

Summary: This paper investigates the promoting effects of support sulfation on the selective catalytic reduction (SCR) performance of CeO2/ZrO2 catalysts. It is found that sulfated ZrO2 can significantly enhance the SCR activity and low-temperature activity of the catalyst, promote the transformation of CeO2 and NH3 adsorption, and is related to factors such as redox property and chemisorbed labile oxygen.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

添加到收藏夹

Article Chemistry, Physical

Decrypting Catalytic NOx Activation and Poison Fragmentation Routes Boosted by Mono- and Bi-Dentate Surface SO32-/SO42- Modifiers under a SO2-Containing Flue Gas Stream

Jongsik Kim et al.

Summary: This study investigates the catalytic significance of SOA2- species in NH3-assisted selective NOx reduction and ammonium sulfate/absorbent poison degradation. The results show that mono-dentate and bi-dentate SOA2- species play crucial roles in directing the reaction pathways and improving the surface redox trait, thus promoting the low-temperature SCR performance and stability under different feed gas streams.

ACS CATALYSIS (2022)

添加到收藏夹

Article Chemistry, Physical

Copper Single Atom-Triggered Niobia-Ceria Catalyst for Efficient Low-Temperature Reduction of Nitrogen Oxides

Shaohua Xie et al.

Summary: In this study, an efficient NbCuCe oxide catalyst for reducing NOx emissions in cold-start diesel engines is reported. The catalyst exhibits higher DeNO(x) activity below 200 degrees C compared to the Cu-CHA zeolite catalyst, along with superior sulfur resistance, faster response, and lower NH3 slip. Atomically dispersed Cu species facilitate strong interaction between Cu and the Nb/Ce base catalyst, leading to improved low-temperature redox properties and NH3 adsorption/activation. The developed NbCuCe catalyst shows promising potential for efficient DeNO(x) in cold-start diesel engines and can be combined with Cu-CHA for a broader temperature range of operation.

ACS CATALYSIS (2022)

添加到收藏夹

Article Engineering, Environmental

SO2- and H2O-Tolerant Catalytic Reduction of NOxat a LowTemperature via Engineering Polymeric VOxSpecies by CeO2

Weiwei Hu et al.

Summary: Selective catalytic reduction (SCR) of NOx using V2O5-based oxide catalysts is a widely used technique, but reducing NOx efficiently at low temperatures in the presence of SO2 and H2O remains a challenge. In this study, engineering polymeric VOx species on CeO2 was found to enable SO2- and H2O-tolerant catalytic reduction of NOx at low temperatures. The polymeric VOx species were formed through the interaction between Ce and V species, and played a role in tuning the SCR reaction. In the presence of SO2 and H2O, the polymeric VOx species remained largely unaffected, while the formation of sulfate species on Ce sites promoted NH4+ adsorption, the reaction between gaseous NO and NH4+, and the decomposition of ammonium bisulfate.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

添加到收藏夹

Article Chemistry, Physical

Selective catalytic reductive removal of NOx with decreased interference from SO2 and H2O by use of Sm-modified SmxCo0.05-xCe0.05Ti0.9Oy catalysts

Xiaoyu Zhao et al.

Summary: A novel and highly efficient NH3-SCR catalyst, Sm-modified CoCeTiOx, was synthesized by a simple one-step sol-gel method, showing high NO conversion and N-2 selectivity. The addition of Sm could precisely regulate the acidity and redox ability of the catalyst, significantly improving the efficiency of the redox cycle.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

添加到收藏夹

Article Engineering, Environmental

Hydrothermal Aging Treatment Activates V2O5/TiO2 Catalysts for NOx Abatement

Zhihua Lian et al.

Summary: In this study, a V2O5/TiO2 catalyst showed improved NH3-SCR activity after hydrothermal aging due to increased surface VOx density and the interaction between vanadia and titania.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

添加到收藏夹

Article Engineering, Environmental

Boosting SO2-Resistant NOx Reduction by Modulating Electronic Interaction of Short-Range Fe-O Coordination over Fe2O3/TiO2 Catalysts

Xiangyu Liu et al.

Summary: SO2-resistant NOx reduction has been enhanced by modulating electronic interaction of short-range Fe-O coordination over Fe2O3/TiO2 catalysts. Sulfur doping exerts strong electronic perturbation to TiO2, causing a net charge transfer from Fe2O3 to TiO2 via increased short-range Fe-O coordination. This electronic effect simultaneously weakens charge transfer from Fe2O3 to SO2 and enhances that from NO/NH3 to Fe2O3.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

添加到收藏夹

Article Chemistry, Physical

Insight into the praseodymium effect on the NH3-SCR reaction pathways over W or Nb supported ceria-zirconia based catalysts

Charlotte Croise et al.

Summary: The study found that partial substitution of zirconium for praseodymium in a ceria-zirconia support can enhance the support reducibility, but impregnation of niobium and tungsten inhibits the redox behaviors. Additionally, niobium and tungsten provide acidic sites while praseodymium inhibits ammonia storage and decreases deNO(x) performances. The various redox and acidic behaviors observed in the studied materials demonstrate a strong competition between NOx SCR and NH3 oxidation pathways.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

添加到收藏夹

Article Chemistry, Physical

A hollow structure WO3@CeO2 catalyst for NH3-SCR of NOx

Xiaoping Chen et al.

Summary: The development of a novel WO3@CeO2 catalyst with hollow structure using carbon sphere as hard template for NH3-SCR of NOx reaction has shown higher catalytic performance and tolerance due to its high specific surface area, reducible W species, increased specific amount of chemisorbed oxygen species, and acid sites.

CATALYSIS COMMUNICATIONS (2021)

添加到收藏夹

Article Engineering, Environmental

Microkinetic study of NO oxidation, standard and fast NH3-SCR on CeWOx at low temperatures

Kuo Liu et al.

Summary: A comprehensive microkinetic model was established for NO oxidation, standard SCR and fast SCR on CeWOx at low temperatures, revealing different rate-limiting steps and reaction orders for different reactions. The mechanisms of standard and fast SCR were found to be similar, with the reaction between nitrites and adsorbed NH3 playing a key role in NOx conversion. The activation energy of fast SCR was higher due to the reaction between NO and NH4NO3, but more nitrites and NH4NO3 led to higher activity for fast SCR compared to standard SCR.

CHEMICAL ENGINEERING JOURNAL (2021)

添加到收藏夹

Article Chemistry, Physical

The promoting mechanism of doping Mn, Co, and Ce on gas adsorption property and anti-SO2 oxidation over γ-Fe2O3 (001) surface: A density functional theory study

Chaoyue Xie et al.

Summary: The study found that Ce doping can significantly improve the gas adsorption performance of the γ-Fe2O3 catalyst, while Mn doping helps in oxidizing SO2 to SO3, and Co and Ce doping inhibit the formation of SO3, especially Ce doping enhances the sulfur resistance of the catalyst.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2021)

添加到收藏夹

Article Chemistry, Physical

Ti3+ doped V2O5/TiO2 catalyst for efficient selective catalytic reduction of NOx with NH3

Wei Zhao et al.

Summary: This study evaluates the effect of self-doping Ti3+ into catalysts on the activity of the catalysts. Various characterization methods such as XRD, XPS, and EPR confirm the presence of Ti3+ and oxygen vacancy, which significantly affect the performance of the catalysts. The results indicate potential for improving low-temperature SCR performance through strategic design of Ti3+ self-doped catalysts.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2021)

添加到收藏夹

Article Chemistry, Physical

Acid modification enhances selective catalytic reduction activity and sulfur dioxide resistance of manganese-cerium-cobalt catalysts: Insight into the role of phosphotungstic acid

Xiaolong Tang et al.

Summary: The HPW modification strategy improved the N-2 selectivity, SO2 and H2O resistance of the Mn-Ce-Co catalyst, and the mechanism of enhanced catalytic performance was explored. The results showed that HPW modification led to higher NOx conversion and N-2 selectivity, due to more oxygen vacancies, greater surface acidity, and lower redox capacity. The study provides a simple design strategy for catalysts to improve low-temperature catalytic performance and toxicity resistance.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2021)

添加到收藏夹

Review Chemistry, Physical

Recent advances in hybrid metal oxide-zeolite catalysts for low-temperature selective catalytic reduction of NOx by ammonia

Tahrizi Andana et al.

Summary: This review discusses the potential advancement of a hybrid catalytic system consisting of metal oxide and zeolite components for the selective catalytic reduction of NOx by ammonia. It explores the synergy between the components, materials selection, recent research on NH3-SCR investigations, and potential future challenges in the development of this innovative catalytic system.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

添加到收藏夹

Article Chemistry, Physical

Insight into the SO2 resistance mechanism on γ-Fe2O3 catalyst in NH3-SCR reaction: A collaborated experimental and DFT study

Yaxin Yu et al.

Summary: Research has shown that SO2 poisoning of NH3-SCR catalysts at low temperature remains a challenge. The formation of sulfate species inhibits the adsorption of NOx, while the formation of ferric sulfate enhances surface acidity, leading to an increase in catalytic activity.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

添加到收藏夹

Article Chemistry, Physical

Two steps synthesis of CeTiOx oxides nanotube catalyst: Enhanced activity, resistance of SO2 and H2O for low temperature NH3-SCR of NOx

Zhiping Zhang et al.

Summary: CeTiOx-T with nanotube structure exhibits excellent catalytic activity, SO2 and H2O tolerance, and stability in NH3-SCR reaction. The strong interaction between Ce and Ti leads to short-range ordered Ce-O-Ti species, resulting in a larger BET surface area and higher NH3-SCR performance than traditional catalysts. In situ DRIFTS results suggest different reaction mechanisms at low and high temperatures over CeTiOx-T.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

添加到收藏夹

Article Engineering, Environmental

Ce-Si Mixed Oxide: A High Sulfur Resistant Catalyst in the NH3-SCR Reaction through the Mechanism-Enhanced Process

Wei Tan et al.

Summary: Investigating catalytic reaction mechanisms can guide catalyst design, as demonstrated by the innovative CeO2-SiO2 mixed oxide catalyst (CeSi2) with excellent SO2/H2O resistance in harsh working conditions. The strong Ce-O-Si interaction and abundant surface hydroxyl groups on CeSi2 provide active acid sites and inhibit SO2 adsorption, enhancing the NH3-SCR performance through an enhanced Eley-Rideal mechanism. This work offers a strategy to develop an environmentally friendly NH3-SCR catalyst with superior SO2 resistance.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

添加到收藏夹

Article Chemistry, Physical

Review of Sulfur Promotion Effects on Metal Oxide Catalysts for NOx Emission Control

Renyi Xie et al.

Summary: This review summarizes recent advances in the sulfur promotion roles of metal oxide catalysts for selective catalytic reduction of NOx with ammonia (NH3-SCR) technology. It discusses the effects of sulfation treatment on sulfate species, proposes a comprehensive overview of reaction mechanisms over sulfated catalysts, and explores methods to construct appropriate acidity of sulfated metal oxides. The article also deliberates over specific catalysts and suggests the potential of other acidification methods to improve surface acidity.

ACS CATALYSIS (2021)

添加到收藏夹

Article Engineering, Environmental

Sulfur-Resistant Ceria-Based Low-Temperature SCR Catalysts with the Non-bulk Electronic States of Ceria

Xiaolei Hu et al.

Summary: By tuning the electronic structures of ceria highly dispersed on acidic MoO3 surfaces, a strong sulfur-resistant ceria-based catalyst can be designed to efficiently control the impact of SO2 at low temperatures on ceria-based SCR catalysts.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

添加到收藏夹

Article Chemistry, Physical

A dual catalytic strategy by the nature of the functionalization effect as well as active species on vanadium-based catalyst for enhanced low temperature SCR

Dong Wook Kwon et al.

Summary: W-Ce and Sb-Ce systems have shown promising surface reaction properties in SCR, with the Sb-Ce system exhibiting better surface functionalization and active site improvement effects.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

添加到收藏夹

Article Chemistry, Physical

Construction of Fe2O3 loaded and mesopore confined thin-layer titania catalyst for efficient NH3-SCR of NOx with enhanced H2O/SO2 tolerance

Kai Guo et al.

Summary: Engineering the surface structure of TiO2 can enhance catalytic performance and stability, as well as improve the activity of NH3 selective catalytic reduction for denitration.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

添加到收藏夹

Article Chemistry, Physical

Introducing tin to develop ternary metal oxides with excellent hydrothermal stability for NH3 selective catalytic reduction of NOx

Jingjing Liu et al.

Summary: In this study, a Ce1W0.24Sn2Ox catalyst with high hydrothermal stability was synthesized for NOx removal from diesel engines, showing excellent performance. The experimental results demonstrate that the catalyst exhibits outstanding sintering resistance and provides sufficient active phase for catalytic reaction.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

添加到收藏夹

Article Chemistry, Physical

Unraveling Reactivity Descriptors and Structure Sensitivity in Low-Temperature NH3-SCR Reaction over CeTiOx Catalysts: A Combined Computational and Experimental Study

Bing Liu et al.

Summary: This study focuses on enhancing the performance of ceria-based NH3-SCR catalysts by controlling the surface structure, leading to the successful design and synthesis of Ti-doped CeO2 solid solution catalysts with superior intrinsic activity and SO2-resistant ability. Density functional theory calculations reveal that the NH3-SCR reaction on Ti-doped CeO2 solid solution primarily follows the Eley-Rideal mechanism.

ACS CATALYSIS (2021)

添加到收藏夹

Article Chemistry, Physical

Understanding the deposition and reaction mechanism of ammonium bisulfate on a vanadia SCR catalyst: A combined DFT and experimental study

Xiangmin Wang et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2020)

添加到收藏夹

Article Engineering, Environmental

Atomic-scale insights into the nature of active sites in Fe2O3-supported submonolayer WO3 catalysts for selective catalytic reduction of NO with NH3

Jie Zhang et al.

CHEMICAL ENGINEERING JOURNAL (2020)

添加到收藏夹

Article Engineering, Environmental

Mechanism by which three-dimensional ordered mesoporous CeO2 promotes the activity of VOx-MnOx/CeO2 catalysts for NOx abatement: Atomic-scale insight into the catalytic cycle

Xiaomin Wu et al.

CHEMICAL ENGINEERING JOURNAL (2020)

添加到收藏夹

Article Engineering, Environmental

Promotional role of Mo on Ce0.3FeOx catalyst towards enhanced NH3-SCR catalytic performance and SO2 resistance

Xiaolong Tang et al.

CHEMICAL ENGINEERING JOURNAL (2020)

添加到收藏夹

Article Engineering, Environmental

Air Pollutant Correlations in China: Secondary Air Pollutant Responses to NOx and SO2 Control

Biwu Chu et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS (2020)

添加到收藏夹

Article Engineering, Environmental

SO2-Tolerant NOx Reduction by Marvelously Suppressing SO2 Adsorption over FeδCe1-δVO4 Catalysts

Lin Kang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2020)

添加到收藏夹

Article Chemistry, Physical

Improved Activity and SO2 Resistance by Sm-Modulated Redox of MnCeSmTiOx Mesoporous Amorphous Oxides for Low-Temperature NH3-SCR of NO

Bing Wang et al.

ACS CATALYSIS (2020)

添加到收藏夹

Article Energy & Fuels

Influence of CeO2 morphology on WO3/CeO2 catalyzed NO selective catalytic reduction by NH3

Xiaoliang Li et al.

JOURNAL OF THE ENERGY INSTITUTE (2020)

添加到收藏夹

Article Chemistry, Applied

NH3-SCR performance of WO3 blanketed CeO2 with different morphology: Balance of surface reducibility and acidity

Dong Wang et al.

CATALYSIS TODAY (2019)

添加到收藏夹

Article Chemistry, Physical

Improved activity and significant SO2 tolerance of samarium modified CeO2-TiO2 catalyst for NO selective catalytic reduction with NH3

Hao Liu et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2019)

添加到收藏夹

Article Engineering, Environmental

Fe2O3-CeO2@Al2O3 Nanoarrays on Al-Mesh as SO2-Tolerant Monolith Catalysts for NO, Reduction by NH3

Lupeng Han et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2019)

添加到收藏夹

Article Chemistry, Physical

A comprehensive study on sulfur tolerance of niobia modified CeO2/WO3-TiO2 catalyst for low-temperature NH3-SCR

Li Cao et al.

APPLIED CATALYSIS A-GENERAL (2019)

添加到收藏夹

Article Chemistry, Physical

The role of molybdenum on the enhanced performance and SO2 resistance of V/Mo-Ti catalysts for NH3-SCR

Dong Wook Kwon et al.

APPLIED SURFACE SCIENCE (2019)

添加到收藏夹

Article Chemistry, Physical

Research progress, challenges and perspectives on the sulfur and water resistance of catalysts for low temperature selective catalytic reduction of NOx by NH3

Huaijian Wang et al.

APPLIED CATALYSIS A-GENERAL (2019)

添加到收藏夹

Article Engineering, Environmental

Improved NOx Reduction in the Presence of SO2 by Using Fe2O3-Promoted Halloysite-Supported CeO2-WO3 Catalysts

Lin Kang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2019)

添加到收藏夹

Article Chemistry, Physical

Quantitative study of the NH3-SCR pathway and the active site distribution over CeWOx at low temperatures

Kuo Liu et al.

JOURNAL OF CATALYSIS (2019)

添加到收藏夹

Article Engineering, Environmental

Gd-modified MnOx for the selective catalytic reduction of NO by NH3: The promoting effect of Gd on the catalytic performance and sulfur resistance

Zhaoyang Fan et al.

CHEMICAL ENGINEERING JOURNAL (2018)

添加到收藏夹

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)

添加到收藏夹

Article Chemistry, Physical

One-pot synthesis of ceria and cerium phosphate (CeO2-CePO4) nanorod composites for selective catalytic reduction of NO with NH3: Active sites and reaction mechanism

Yiqing Zeng et al.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2018)

添加到收藏夹

Article Chemistry, Physical

Improvement of Nb Doping on SO2 Resistance of VOx/CeO2 Catalyst for the Selective Catalytic Reduction of NOx with NH3

Zhihua Lian et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2017)

添加到收藏夹

Article Chemistry, Physical

Acid pretreatment effect on the physicochemical property and catalytic performance of CeO2 for NH3-SCR

Xiaojiang Yao et al.

APPLIED CATALYSIS A-GENERAL (2017)

添加到收藏夹

Article Chemistry, Physical

Efficient NH3-SCR removal of NOx with highly ordered mesoporous WO3(χ)-CeO2 at low temperatures

Sihui Zhan et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2017)

添加到收藏夹

Article Engineering, Environmental

Activity enhancement of WO3 modified Fe2O3 catalyst for the selective catalytic reduction of NOx by NH3

Zhiming Liu et al.

CHEMICAL ENGINEERING JOURNAL (2016)

添加到收藏夹

Article Chemistry, Physical

Getting insight into the influence of SO2 on TiO2/CeO2 for the selective catalytic reduction of NO by NH3

Lei Zhang et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2015)

添加到收藏夹

Article Chemistry, Physical

A Highly Effective Catalyst of Sm-MnOx for the NH3-SCR of NOx at Low Temperature: Promotional Role of Sm and Its Catalytic Performance

Dongmei Meng et al.

ACS CATALYSIS (2015)

添加到收藏夹

Article Chemistry, Physical

Influence of sulfation on iron titanate catalyst for the selective catalytic reduction of NOx with NH3

Fudong Liu et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2011)

添加到收藏夹

Article Chemistry, Physical

CeO2-WO3 Mixed Oxides for the Selective Catalytic Reduction of NOx by NH3 Over a Wide Temperature Range

Liang Chen et al.

CATALYSIS LETTERS (2011)

添加到收藏夹

Article Chemistry, Physical

Selective catalytic reduction of NO with NH3 over iron titanate catalyst: Catalytic performance and characterization

Fudong Liu et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2010)

添加到收藏夹

Article Chemistry, Physical

The enhanced performance of ceria with surface sulfation for selective catalytic reduction of NO by NH3

Tingting Gu et al.

CATALYSIS COMMUNICATIONS (2010)

添加到收藏夹

Insight into the mechanisms of activity promotion and SO2 resistance over Fe-doped Ce-W oxide catalyst for NOx reduction

相关参考文献

导出引文

分享论文