☆ 4.6 Article

OSDA-Free Seeded Cu-Containing ZSM-5 Applied for NH3-SCR-DeNO x

ACS OMEGA (2023)

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 Chemistry, Physical

Effect of the preparation method on the catalytic properties of copper-containing zeolite Y applied for NH3-SCR-DeNOx

Rujito S. R. Suharbiansah et al.

Summary: Two series of zeolite Y with different particle sizes (approximately 100 or 400 nm) were prepared using different synthesis gel compositions, ageing, and hydrothermal steps. Copper-containing zeolite Y samples were obtained through ion-exchange and characterized. The catalytic activity of these materials varied significantly due to the different copper species present.

CATALYSIS SCIENCE & TECHNOLOGY (2023)

添加到收藏夹

Article Chemistry, Multidisciplinary

Defect Sites in Zeolites: Origin and Healing

Ana Palcic et al.

Summary: This study investigates the relationship between synthesis conditions and defect formation in zeolites, and explores the impact of defect healing on the physicochemical properties of zeolites. The results reveal that synthesis conditions have a significant influence on the hydrophobicity and defect quantity of zeolites.

ADVANCED SCIENCE (2022)

添加到收藏夹

Article Chemistry, Physical

Influence of Framework n(Si)/n(Al) Ratio on the Nature of Cu Species in Cu-ZSM-5 for NH3-SCR-DeNOx

Magdalena Jablonska et al.

Summary: In this study, nanosized Cu-containing ZSM-5 catalysts with different n(Si)/n(Al) ratios ranging from 18.9 to 50.5 were prepared by ion-exchange. Physico-chemical characterization revealed that the nature and distribution of copper species are influenced by the molar ratio of framework T atoms. Spectroscopic analyses, including DR UV-Vis, TPR-H-2, EPR, and FT-IR, indicated that the amount of aggregated copper species increases with an increase in the framework n(Si)/n(Al) ratio. The activity of Cu-containing ZSM-5 in the NH3-SCR-DeNO(x) reaction significantly decreases when the n(Si)/n(Al) ratio is between 47.0 and 50.5 compared to other materials with n(Si)/n(Al) ratios of 18.9-19.6. The mechanism of the reaction was discussed based on 2D COS analysis of IR spectra and the catalytic properties of zeolites.

CHEMCATCHEM (2022)

添加到收藏夹

Article Chemistry, Physical

Comparison of Industrial and Lab-Scale Ion Exchange for the DeNOx-SCR Performance of Cu Chabazites: A Case Study

Valentina Rizzotto et al.

Summary: Selective catalytic reduction (SCR) by NH3 catalysts remains essential for exhaust gas purification, particularly in heavy-duty diesel engines, despite the growing trend towards electrification of powertrains. The synthesis scale of Cu-exchanged chabazite catalysts for SCR was found to influence their catalytic performance, especially in NH3 oxidation.

CATALYSTS (2022)

添加到收藏夹

Article Engineering, Chemical

OSDA-free synthesis of zeolite beta: Broadening the methodology for a successful use of the product as a seed

Junki Tomita et al.

Summary: The synthesis of zeolite beta without organic structure directing agents (OSDAs) is achieved through the addition of seed crystals. However, using OSDA-free synthesized zeolite beta as seed crystals is challenging and leads to the formation of mordenite zeolite as a contaminant. In this study, a successful post-synthetic powder technology is demonstrated for retrieving pure zeolite beta seed particles that were originally mixed with mordenite impurity. The technique involves centrifugation and allows for the segregation of pure beta microparticles for use as OSDA-free beta seeds. The recycling of this technique is successful for up to three generations. It was also found that controlling the silicon to aluminum ratio and using acid and alkali treatments aid in the formation of pure phase zeolite beta.

ADVANCED POWDER TECHNOLOGY (2022)

添加到收藏夹

Article Engineering, Chemical

N2O Formation during NH3-SCR over Different Zeolite Frameworks: Effect of Framework Structure, Copper Species, and Water

Joonsoo Han et al.

Summary: The study found that Cu/CHA has a framework structure that favors the formation of AN, thereby reducing the generation of N2O, but also leading to the release of N2O through AN decomposition. The addition of water inhibits the formation of AN and increases the selectivity for AN decomposition to NO2 instead of N2O.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2021)

添加到收藏夹

Article Chemistry, Physical

Efficient Strategy to Regenerate Phosphorus-Poisoned Cu-SSZ-13 Catalysts for the NH3-SCR of NOx: The Deactivation and Promotion Mechanism of Phosphorus

Zhen Chen et al.

Summary: This study found that washing with hot water can regenerate phosphorus-poisoned Cu-SSZ-13 catalyst, restoring its performance and prolonging its lifespan. The promotion effect of phosphorus on SCR performance after regeneration is attributed to the decrease in CuO species content and recovery of acid sites and active Cu2+ ions.

ACS CATALYSIS (2021)

添加到收藏夹

Article Chemistry, Physical

Effect of zeolite topology on NH3-SCR activity and stability of Cu-exchanged zeolites

Karolina A. Tarach et al.

Summary: The study evaluated the catalytic activity and stability of Cu-exchanged zeolites in NH3-SCR reaction, showing that the reaction mechanism involves [Cu(OH)(NH3)2(NO)](+) intermediates and reduction of Cu(II) to Cu(I). The differentiated speciation of copper sites plays a crucial role in determining the catalytic activity and stability of the zeolitic catalysts.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

添加到收藏夹

Article Engineering, Environmental

Highly Efficient NO Abatement over Cu-ZSM-5 with Special Nanosheet Features

Hao Wang et al.

Summary: The study focused on synthesizing and comparing different morphologies of Cu-ZSM-5 catalysts for the selective catalytic reduction of NO to N-2 with ammonia. Nanosheet-like Cu-ZSM-5 exhibited the best SCR performance due to its unique structure promoting the formation of active copper species and rapid conversion between Cu2+ and Cu+. In situ DRIFTS results showed that nanosheets followed the Eley-Rideal mechanism with labile nitrite species crucial for the SCR process, while nanoparticles and conventional catalysts tended to generate inert nitrates. This research provides insights for the design of efficient zeolite catalysts for NH3-SCR.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

添加到收藏夹

Article Chemistry, Physical

Cu-ZSM-5 Catalyst Impregnated with Mn-Co Oxide for the Selected Catalytic Reduction of NO: Physicochemical Property-Catalytic Activity Relationship and In Situ DRIFTS Study for the Reaction Mechanism

Hongyan Xue et al.

Summary: A series of MnCo/Cu-Z catalysts with different Mn/Co ratios were prepared and investigated for the SCR of NO with NH3. The Mn1Co2/Cu-Z catalyst showed the highest activity, with high-valent metal ion enrichment and improved metal oxide reducibility contributing to its enhanced catalytic performance. The nitrate species on the catalyst surface and SCR mechanism play crucial roles in the catalytic activity of MnCo/Cu-Z.

ACS CATALYSIS (2021)

添加到收藏夹

Article Chemistry, Physical

Effect of Textural Properties and Presence of Co-Cation on NH3-SCR Activity of Cu-Exchanged ZSM-5

Magdalena Jablonska et al.

Summary: Comparative studies on micro-/mesoporous Cu-containing zeolites ZSM-5 treated by NaOH, TPAOH, or NaOH/TPAOH revealed that Cu-ZSM-5 catalyst showed the highest activity. Co-cations promoted the formation of [Cu-O-Cu](2+) dimers binding strongly with NOx, with a desorption energy barrier of at least 80 kJ mol(-1).

CATALYSTS (2021)

添加到收藏夹

Article Instruments & Instrumentation

ProQEXAFS: a highly optimized parallelized rapid processing software for QEXAFS data

Adam H. Clark et al.

JOURNAL OF SYNCHROTRON RADIATION (2020)

添加到收藏夹

Review Chemistry, Multidisciplinary

Applications of Zeolites to C1 Chemistry: Recent Advances, Challenges, and Opportunities

Qiang Zhang et al.

ADVANCED MATERIALS (2020)

添加到收藏夹

Article Environmental Sciences

Spectroscopic identification and catalytic relevance of NH4+ intermediates in selective NOx reduction over Cu-SSZ-13 zeolites

Valentina Rizzotto et al.

CHEMOSPHERE (2020)

添加到收藏夹

Article Chemistry, Applied

Seed-Assisted zeolite synthesis: The impact of seeding conditions and interzeolite transformations on crystal structure and morphology

Rishabh Jain et al.

MICROPOROUS AND MESOPOROUS MATERIALS (2020)

添加到收藏夹

Article Chemistry, Physical

Investigation of the robust hydrothermal stability of Cu/LTA for NH3-SCR reaction

Aiyong Wang et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2019)

添加到收藏夹

Article Chemistry, Inorganic & Nuclear

Synthesis of zeolite SSZ-24 using a catalytic amount of SSZ-13 seeds

Lingxue Tang et al.

INORGANIC CHEMISTRY FRONTIERS (2019)

添加到收藏夹

Article Chemistry, Multidisciplinary

Tuning Zeolite Properties for a Highly Efficient Synthesis of Propylene from Methanol

Ana Palcic et al.

CHEMISTRY-A EUROPEAN JOURNAL (2018)

添加到收藏夹

Article Chemistry, Physical

Conversion of ethylene into propylene with the siliceous SSZ-13 zeolite prepared without an organic structure-directing agent

Biswa Nath Bhadra et al.

JOURNAL OF CATALYSIS (2018)

添加到收藏夹

Article Chemistry, Applied

Identification and Quantification of Copper Sites in Zeolites by Electron Paramagnetic Resonance Spectroscopy

Anita Godiksen et al.

TOPICS IN CATALYSIS (2017)

添加到收藏夹

Article Chemistry, Applied

Aggregates of superfine ZSM-5 crystals: The effect of NaOH on the catalytic performance of methanol to propylene reaction

Hengbao Chen et al.

MICROPOROUS AND MESOPOROUS MATERIALS (2017)

添加到收藏夹

Article Multidisciplinary Sciences

Nanoscale tomography reveals the deactivation of automotive copper-exchanged zeolite catalysts

Joel E. Schmidt et al.

NATURE COMMUNICATIONS (2017)

添加到收藏夹

Article Chemistry, Physical

Seed-induced and additive-free synthesis of oriented nanorod-assembled meso/macroporous zeolites: toward efficient and cost-effective catalysts for the MTA reaction

Kui Shen et al.

CATALYSIS SCIENCE & TECHNOLOGY (2017)

添加到收藏夹

Article Chemistry, Multidisciplinary

Precise control of the size of zeolite B-ZSM-5 based on seed surface crystallization

Chengyi Dai et al.

RSC ADVANCES (2017)

添加到收藏夹

Article Environmental Sciences

Synthesis and kinetics investigation of meso-microporous Cu-SAPO-34 catalysts for the selective catalytic reduction of NO with ammonia

Jixing Liu et al.

JOURNAL OF ENVIRONMENTAL SCIENCES (2016)

添加到收藏夹

Article Chemistry, Physical

Cu-substituted ZSM-5 catalyst: Controlling of DeNOx reactivity via ion-exchange mode with copper-ammonia solution

Svetlana Yashnik et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2015)

添加到收藏夹

Article Materials Science, Multidisciplinary

Seed-assisted OSDA-free synthesis of ZSM-5 zeolite and its application in dehydrogenation of propane

Marjan Razavian et al.

MATERIALS RESEARCH BULLETIN (2015)

添加到收藏夹

Article Chemistry, Physical

Influence of lattice stability on hydrothermal deactivation of Cu-ZSM-5 and Cu-IM-5 zeolites for selective catalytic reduction of NOx by NH3

Peter N. R. Vennestrom et al.

JOURNAL OF CATALYSIS (2014)

添加到收藏夹

Article Chemistry, Physical

Interaction of NH3 with Cu-SSZ-13 Catalyst: A Complementary FTIR, XANES, and XES Study

Filippo Giordanino et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2014)

添加到收藏夹

Article Chemistry, Physical

Determining the storage, availability and reactivity of NH3 within Cu-Chabazite-based Ammonia Selective Catalytic Reduction systems

I. Lezcano-Gonzalez et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2014)

添加到收藏夹

Article Chemistry, Physical

Reaction Conditions of Methane-to-Methanol Conversion Affect the Structure of Active Copper Sites

Evalyn Mae C. Alayon et al.

ACS CATALYSIS (2014)

添加到收藏夹

Article Chemistry, Physical

Nano-crystallite oriented self-assembled ZSM-5 zeolite and its LDPE cracking properties: Effects of accessibility and strength of acid sites

Hongbin Zhang et al.

JOURNAL OF CATALYSIS (2013)

添加到收藏夹

Article Chemistry, Applied

Nanosized ZSM-5 zeolites: Seed-induced synthesis and the relation between the physicochemical properties and the catalytic performance in the alkylation of naphthalene

Guang Wu et al.

MICROPOROUS AND MESOPOROUS MATERIALS (2013)

添加到收藏夹

Article Chemistry, Applied

Screening of Fe-Cu-Zeolites Prepared by Different Methodology for Application in NSR-SCR Combined DeNOx Systems

Unai De La Torre et al.

TOPICS IN CATALYSIS (2013)

添加到收藏夹

Article Chemistry, Physical

Unusual Complete Reduction of Cu2+ Species in Cu-ZSM-5 Zeolites under Vacuum Treatment at High Temperature

Manlio Occhiuzzi et al.

CHEMISTRY OF MATERIALS (2012)

添加到收藏夹

Article Chemistry, Physical

Effects of hydrothermal aging on NH3-SCR reaction over Cu/zeolites

Ja Hun Kwak et al.

JOURNAL OF CATALYSIS (2012)

添加到收藏夹

Article Chemistry, Applied

Seed-induced synthesis of mesoporous ZSM-5 aggregates using tetrapropylammonium hydroxide as single template

Teng Xue et al.

MICROPOROUS AND MESOPOROUS MATERIALS (2012)

添加到收藏夹

Article Engineering, Chemical

Seed-Induced Crystallization of Nanosized Na-ZSM-5 Crystals

Gerardo Majano et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2009)

添加到收藏夹

Article Physics, Condensed Matter

The 1s x-ray absorption pre-edge structures in transition metal oxides

Frank de Groot et al.

JOURNAL OF PHYSICS-CONDENSED MATTER (2009)

添加到收藏夹

Article Chemistry, Physical

The acid properties of H-ZSM-5 as studied by NH3-TPD and 27Al-MAS-NMR spectroscopy

Luz Rodriguez-Gonzalez et al.

APPLIED CATALYSIS A-GENERAL (2007)

添加到收藏夹

Article Biochemical Research Methods

EasySpin, a comprehensive software package for spectral simulation and analysis in EPR

S Stoll et al.

JOURNAL OF MAGNETIC RESONANCE (2006)

添加到收藏夹

Article Materials Science, Multidisciplinary

Preparation and characterization of nanosized ZSM-5 zeolites in the absence of organic template

Y Cheng et al.

MATERIALS LETTERS (2005)

添加到收藏夹

Article Instruments & Instrumentation

ATHENA, ARTEMIS, HEPHAESTUS:: data analysis for X-ray absorption spectroscopy using IFEFFIT

B Ravel et al.

JOURNAL OF SYNCHROTRON RADIATION (2005)

添加到收藏夹

Article Chemistry, Physical

Variations in the extent of pyrochlore-type cation ordering in Ce2Zr2O8:: A t′-κ pathway to low-temperature reduction

T Montini et al.

CHEMISTRY OF MATERIALS (2005)

添加到收藏夹

Article Chemistry, Multidisciplinary

Modelling one- and two-dimensional solid-state NMR spectra

D Massiot et al.

MAGNETIC RESONANCE IN CHEMISTRY (2002)

添加到收藏夹

Article Chemistry, Physical

Preparation of regular macroporous structures built of intergrown silicalite-1 nanocrystals

V Valtchev

JOURNAL OF MATERIALS CHEMISTRY (2002)

添加到收藏夹

Article Chemistry, Physical

EPR study of copper-exchanged zeolites:: Effects of correlated g- and A-strain, Si/Al ratio, and parent zeolite

PJ Carl et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2000)

添加到收藏夹

© Peeref 2019-2024. All rights reserved.