Mn-Ce Catalysts/LDPC Modified by Mo for Improving NH3-SCR Performance and SO2 Resistance at Low Temperature

Article Energy & Fuels

Experimental investigation on the decomposition of NH4HSO4 over V2O5-WO3/TiO2 catalyst by NH4NO3 at low temperature

Ziwen Zheng et al.

Summary: The addition of NH4NO3 effectively reduces the deposition of NH4HSO4 on the catalyst surface, weakening the degree of catalyst poisoning deactivation. NH4NO3 also promotes the regeneration of catalyst deactivated by NH4HSO4.

FUEL (2023)

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Article Chemistry, Inorganic & Nuclear

Influence of nonmetallic elements doping on the NH3-SCR activity and properties of Ce20W10Ti100Oz catalyst via melamine modification

Zhibo Xiong et al.

Summary: By doping C and/or N elements into the lattice of Ce20W10Ti100Oz and modifying with melamine (Mel), the surface chemical adsorbed oxygen (O alpha) concentration of Ce20W10Ti100Oz was significantly enhanced, leading to a significant improvement in its catalytic activity.

JOURNAL OF SOLID STATE CHEMISTRY (2023)

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Article Energy & Fuels

Ultra-high hydrothermal stability of Ce-based NH3-SCR catalyst for diesel engines: A substitute for Cu zeolites

Siru Lu et al.

Summary: Ce-PO43- catalyst shows superior hydrothermal stability and has the potential to replace commercial Cu-SSZ-13, providing a strategy to improve the hydrothermal stability of metal oxide SCR catalysts for the removal of NOx from vehicle emissions.

FUEL (2023)

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Article Engineering, Environmental

Simultaneous removal of NOx and dust with integrated catalytic filter: Interactions between NH3-SCR and filtration processes

Liang Shan et al.

Summary: The novel catalytic filter, FeWOx/SSFF, fabricated by depositing FeWO(x) heterogeneous catalyst onto stainless-steel-fiber filter, exhibits excellent deNO(x) performance (> 85% NOx conversion and 96% N-2 selectivity), superior H2O and SO2 tolerance, as well as high dedust efficiency (> 99.99%) and low residual pressure drop. The interactions between the SCR and dedust processes are revealed, with dedust process boosting the denitrification. Excessive dust-cake can inhibit SCR performance, but SCR process hardly affects dedust efficiency and residual pressure drop. This work provides a way to design novel catalytic filters for simultaneous removal of gas pollutants and dust.

CHEMICAL ENGINEERING JOURNAL (2023)

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Article Environmental Sciences

Efficient synergistic catalysis of chlorinated aromatic hydrocarbons and NOx over novel low-temperature catalysts: Nano-TiO2 modification and interaction mechanism

Yunfeng Ma et al.

Summary: A novel VOx-CeOx-WOx/TiO2 catalyst was studied for efficient and synergistic removal of chlorinated aromatic hydrocarbons and NOx at low temperatures. The catalyst showed excellent oxygen storage/release capacity and desirable 1,2-DCB conversion efficiency. The nano-TiO2 modification slightly impaired the 1,2-DCB oxidation but enhanced NO conversion by improving catalyst reducibility.

CHEMOSPHERE (2023)

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Article Green & Sustainable Science & Technology

PTFE-Modified Mn-Co-Based Catalytic Ceramic Filters with H2O Resistance for Low-Temperature NH3-SCR

Kun Li et al.

Summary: Mn-Co-based catalysts were impregnated into ceramic filters for the coprocessing of dust and NOx in flue gas. The influence of Mn/Co ratio and loading on catalytic performance was investigated. A Mn/Co molar ratio of 2/1 achieved 99% NO conversion by NH3-SCR in the temperature range of 100-180 ºC, but exhibited poor resistance to H2O. The modified filter with PTFE showed superior resistance to H2O and SO2 at low temperatures and satisfactory self-cleaning performance.

SUSTAINABILITY (2022)

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Article Chemistry, Multidisciplinary

Insights to sulfur-resistant mechanisms of reduced graphene oxide supported MnOx-CeOy catalysts for low-temperature NH3-SCR

Qi Han et al.

Summary: The MnOx-CeOy/rGO catalysts prepared by hydrothermal method exhibit excellent catalytic activity and sulfur resistance in the selective catalytic reduction of NO with NH3.

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS (2022)

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Article Engineering, Environmental

Advanced Flue-Gas cleaning by wet oxidative scrubbing (WOS) using NaClO2 aqueous solutions

D. Flagiello et al.

Summary: This study investigates the use of a Wet-Oxidative Scrubber (WOS) for controlling both SO2 and NOx emissions from exhaust flue-gases. The results show that the WOS can simultaneously remove SO2 and NOx, and the presence of SO2 in the flue-gas enhances the oxidative mechanisms, leading to improved NOx removal efficiency. A predictive model based on experimental dosages of NaClO2 is developed to predict the performance of the WOS unit, including de-SOx and de-NOx efficiencies as well as wash water pH.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Engineering, Environmental

Efficient MnOx-CeO2/Ti-bearing blast furnace slag catalyst for NH3-SCR of NO at low temperature: Study of support treating and Mn/Ce ratio

Ming Kong et al.

Summary: This study successfully developed a low-temperature SCR catalyst support with excellent properties by optimizing the treatment of titanium-bearing blast furnace slag. By loading appropriate ingredients on this support, the SCR performance of the catalyst was greatly improved. This work provides important guidance for the utilization of waste titanium-bearing blast furnace slag and the reduction of denitrification cost.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

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Article Engineering, Environmental

Catalytic performance over Mn-Ce catalysts for NH3-SCR of NO at low temperature: Different zeolite supports

Lin Chen et al.

Summary: The Mn-Ce/zeolite catalysts were synthesized to study their NH3-SCR performance at low temperatures. The Mn-Ce/X catalyst showed the highest NO conversion and SO2 resistance, while Mn-Ce/ZSM-5 and Mn-Ce/Beta catalysts had high NO conversion at higher temperatures. Furthermore, Mn-Ce/X catalyst had better acid sites and stability, promoting NH3-SCR activity.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

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Article Chemistry, Applied

Low-temperature NH3-SCR of NOx over MnCeOx/TiO2 catalyst: Enhanced activity and SO2 tolerance by modifying TiO2 with Al2O3

Gang Li et al.

Summary: A series of TiO2-Al2O3 composites were synthesized and used as supports for MnCeOx catalysts, with MnCeOx/TiO2-Al2O3 showing higher activity and better tolerance. This is attributed to higher concentrations of Mn4+ and chemisorbed oxygen species, stronger reducibility, and larger adsorption capacity.

JOURNAL OF RARE EARTHS (2021)

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Article Environmental Sciences

Low-medium temperature application of selective catalytic reduction denitration in cement flue gas through a pilot plant

Yangyang Guo et al.

Summary: The study established and investigated low to medium temperature application of selective catalytic reduction (SCR) denitration in cement flue gas. The results showed that the increase of SO2 in flue gas led to elevated NOx concentration, and sulfur deposition was identified as the main cause of catalyst deactivation.

CHEMOSPHERE (2021)

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Article Engineering, Chemical

CeMn/TiO2 catalysts prepared by different methods for enhanced low-temperature NH3-SCR catalytic performance

Xianlong Zhang et al.

Summary: Ce(1.0)Mn/TiO2 catalysts with the same Ce/Mn molar ratio were prepared by impregnation method and in situ deposition method. The catalyst prepared by in-situ deposition showed better catalytic performance and sulfur resistance compared to that prepared by impregnation. Various characterization methods were used to explore the differences between the two methods, with the catalyst prepared by in-situ deposition method exhibiting higher surface area, better thermal stability, higher concentration of acidic sites, and less agglomeration than the catalyst prepared by impregnation. The in-situ deposition method also enhanced electron mobility effect, thereby improving low-temperature DeNO(x) efficiency.

CHEMICAL ENGINEERING SCIENCE (2021)

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Article Multidisciplinary Sciences

Simultaneous removal of SO2 and NOx from flue gas by low-temperature adsorption over activated carbon

Shiqing Wang et al.

Summary: Under cold temperatures, the presence of oxygen enhances the adsorption capacity of NO on activated carbon. The adsorption capacity of SO2 is also significantly increased at low temperatures. A novel low-temperature adsorption (LAS) process is developed for simultaneous removal of SO2 and NOx from flue gas.

SCIENTIFIC REPORTS (2021)

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Article Energy & Fuels

Mn and Fe oxides co-effect on nanopolyhedron CeO2 catalyst for NH3-SCR of NO

Yuhan Zhou et al.

Summary: The research shows that loading manganese and iron oxide active components on the surface of CeO2 nanopolyhedrons catalyst can significantly improve its low temperature SCR performance. The Fe-Mn-Ce catalyst exhibits the highest NO conversion rate and best reducibility and surface acidity among the catalysts tested.

JOURNAL OF THE ENERGY INSTITUTE (2021)

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Article Engineering, Environmental

Iron doped effects on active sites formation over activated carbon supported Mn-Ce oxide catalysts for low-temperature SCR of NO

Jie Yang et al.

CHEMICAL ENGINEERING JOURNAL (2020)

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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)

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Article Engineering, Chemical

Porous TiO2 aerogel-modified SiC ceramic membrane supported MnOx catalyst for simultaneous removal of NO and dust

Bing Pan et al.

JOURNAL OF MEMBRANE SCIENCE (2020)

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Article Engineering, Environmental

V2O5-modified Mn-Ce/AC catalyst with high SO2 tolerance for low-temperature NH3-SCR of NO

Lijun Jiang et al.

CHEMICAL ENGINEERING JOURNAL (2019)

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Article Engineering, Environmental

K+ deactivation of V2O5-WO3/TiO2 catalyst during selective catalytic reduction of NO with NH3: Effect of vanadium content

Ming Kong et al.

CHEMICAL ENGINEERING JOURNAL (2019)

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Article Chemistry, Physical

Evolution of oxygen vacancies in MnOx-CeO2 mixed oxides for soot oxidation

Lin Xueting et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2018)

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Article Chemistry, Physical

Rational design of template-free MnOx-CeO2 hollow nanotube as de-NOx catalyst at low temperature

Chenlu Li et al.

APPLIED SURFACE SCIENCE (2018)

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Article Engineering, Environmental

Effect of different potassium species on the deactivation of V2O5-WO3/TiO2 SCR catalyst: Comparison of K2SO4, KCl and K2O

Ming Kong et al.

CHEMICAL ENGINEERING JOURNAL (2018)

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Article Materials Science, Multidisciplinary

Study of the alkali metal poisoning resistance of a Co-modified Mn/Ni foam catalyst in low-temperature flue gas SCR DeNO (x)

Guobo Li et al.

JOURNAL OF MATERIALS SCIENCE (2018)

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Article Chemistry, Physical

Facile and template-free fabrication of mesoporous 3D nanosphere-like MnxCo3-xO4 as highly effective catalysts for low temperature SCR of NOx with NH3

Xiaonan Hu et al.

JOURNAL OF MATERIALS CHEMISTRY A (2018)

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Article Chemistry, Physical

Promotional effects of Nb on selective catalytic reduction of NO with NH3 over Fe-x-Nb0.5-x-Ce-0.5 (x=0.45, 0.4, 0.35) oxides catalysts

Sher Ali et al.

MOLECULAR CATALYSIS (2018)

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Article Materials Science, Ceramics

Preparation of porous ceramic membrane for gas-solid separation

Xinying Song et al.

CERAMICS INTERNATIONAL (2018)

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Article Chemistry, Applied

Ce1-xFexO2-δ catalysts for catalytic methane combustion: Role of oxygen vacancy and structural dependence

Danyang Li et al.

CATALYSIS TODAY (2018)

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Article Chemistry, Applied

NH3-SCR performance improvement over Mo modified Mo(x)-MnOx nanorods at low temperatures

Xiaolei Hu et al.

CATALYSIS TODAY (2017)

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Article Nanoscience & Nanotechnology

Promotional Effects of Ti on a CeO2-MoO3 Catalyst for the Selective Catalytic Reduction of NOx with NH3

Yang Geng et al.

ACS APPLIED MATERIALS & INTERFACES (2017)

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Article Chemistry, Physical

The poisoning effect of PbO on Mn-Ce/TiO2 catalyst for selective catalytic reduction of NO with NH3 at low temperature

Lingling Zhou et al.

APPLIED SURFACE SCIENCE (2016)

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Article Energy & Fuels

Removal of dust particles from fuel gas using a moving granular bed filter

Yi-Shun Chen et al.

FUEL (2016)

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Article Energy & Fuels

The promotion effect of Sb on the Na resistance of Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3

Ning-zhi Yang et al.

FUEL (2016)

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Article Chemistry, Physical

The role of ceria on the activity and SO2 resistance of catalysts for the selective catalytic reduction of NOx by NH3

Dong Wook Kwon et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2015)

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Article Chemistry, Physical

Nanostructured manganese doped ceria solid solutions for CO oxidation at lower temperatures

Perala Venkataswamy et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2015)

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Article Engineering, Environmental

Study on the catalysis of CaCO3 in the SNCR deNOx process for cement kilns

Shi-Long Fu et al.

CHEMICAL ENGINEERING JOURNAL (2015)

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Article Chemistry, Physical

The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature

Ruiben Jin et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2014)

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Article Engineering, Environmental

Catalytic performance of acidic zirconium-based composite oxides monolithic catalyst on selective catalytic reduction of NOx with NH3

Haidi Xu et al.

CHEMICAL ENGINEERING JOURNAL (2014)

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Article Chemistry, Physical

Tailoring of the structure of Fe-cationic species in Fe-ZSM-5 by distribution of Al atoms in the framework for N2O decomposition and NH3-SCR-NOx

Petr Sazama et al.

JOURNAL OF CATALYSIS (2014)

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Article Energy & Fuels

Next generation of ceramic hot gas filter with safety fuses integrated in venturi ejectors

Steffen Heidenreich et al.

FUEL (2013)

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Article Engineering, Chemical

Removal of Organic Aerosols from Furnace Flue Gas by Ceramic Filters

Zhaoxiang Zhong et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2013)

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Article Chemistry, Physical

Effect of Sn on MnOx-CeO2 catalyst for SCR of NOx by ammonia: Enhancement of activity and remarkable resistance to SO2

Huazhen Chang et al.

CATALYSIS COMMUNICATIONS (2012)

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Article Environmental Sciences

Low-temperature selective catalytic reduction of NO with NH3 over Mn-Ce oxides supported on TiO2 and Al2O3: A comparative study

Ruiben Jin et al.

CHEMOSPHERE (2010)

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Article Chemistry, Physical

Low-temperature selective catalytic reduction of NO with NH3 over iron and manganese oxides supported on titania

GS Qi et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2003)

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Article Chemistry, Physical

Mechanism of NOx removal by electron beam process in the presence ot scavengers

AG Chmielewski et al.

RADIATION PHYSICS AND CHEMISTRY (2002)

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Article Environmental Sciences

Overview and status of post-combustion NOx control: SNCR, SCR and hybrid technologies

LJ Muzio et al.

INTERNATIONAL JOURNAL OF ENVIRONMENT AND POLLUTION (2002)

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Mn-Ce Catalysts/LDPC Modified by Mo for Improving NH3-SCR Performance and SO2 Resistance at Low Temperature

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