Research on the resistance of catalysts for selective catalytic reduction: Current progresses and future perspectives DOI
Yaoyao Zhang, Bin Guan, Chunzheng Zheng

et al.

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 434, P. 139920 - 139920

Published: Dec. 2, 2023

Language: Английский

Effect of Mn and Ce oxides on low-temperature NH3-SCR performance over blast furnace slag-derived zeolite X supported catalysts DOI
Lin Chen, Shan Ren,

Yanhua Jiang

et al.

Fuel, Journal Year: 2022, Volume and Issue: 320, P. 123969 - 123969

Published: March 26, 2022

Language: Английский

Citations

91
Research Progress on Preparation of Metal Oxide Catalysts with Porous Structure and Their Catalytic Purification of Diesel Engine Exhausts Gases DOI
Shengran Zhou,

Lanyi Wang,

Siyu Gao

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(8), P. 6062 - 6127

Published: April 8, 2024

Because of their special physicochemical properties, pore-structured metal oxide catalysts are widely used in environmental catalysis, energy chemicals, fuel cells, medicine, and other related fields. In recent years, these oxides have also been increasingly studied the catalytic purification diesel engine exhaust gases. this paper, research progresses preparation methods porous application were reviewed. The advantages disadvantages different for synthesis elaborated, as well mechanism comparison types pollutants. Finally, current issues on development trends summarized discussed. beneficial improving contact efficiency between pollutants, which can enhance catalysts. Meanwhile, intrinsic activity is most fundamental factor determining except structure effects. addition, paper help researchers to deeply understand important effect treatment pollutants provide theoretical guidance design high-efficiency

Language: Английский

Citations

19
Challenges and Perspectives of Environmental Catalysis for NOx Reduction DOI Creative Commons
Yanqi Chen, Xiangyu Liu, Penglu Wang

et al.

JACS Au, Journal Year: 2024, Volume and Issue: 4(8), P. 2767 - 2791

Published: Aug. 15, 2024

Environmental catalysis has attracted great interest in air and water purification. Selective catalytic reduction with ammonia (NH

Language: Английский

Citations

14
Investigation of crystal size effect on the NOx storage performance of Pd/SSZ-13 passive NOx adsorbers DOI
Zexiang Chen, Mingdong Wang, Jun Wang

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 291, P. 120026 - 120026

Published: Feb. 26, 2021

Language: Английский

Citations

49
Controlled synthesis of Cu-based SAPO-18/34 intergrowth zeolites for selective catalytic reduction of NOx by ammonia DOI
Shoute Zhang, Shujun Ming, Lei Guo

et al.

Journal of Hazardous Materials, Journal Year: 2021, Volume and Issue: 414, P. 125543 - 125543

Published: Feb. 26, 2021

Language: Английский

Citations

48
Selective catalytic reduction of NOx by NH3 over Cu-AEI zeolite catalyst: Current status and future perspectives DOI
Yao Wang,

Junhua Li,

Zhiming Liu

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 343, P. 123479 - 123479

Published: Nov. 7, 2023

Language: Английский

Citations

20
Aftertreatment Technologies for Diesel Engines: An Overview of the Combined Systems DOI Open Access
Ferenc Martinović, L. Castoldi, Fabio Alessandro Deorsola

et al.

Catalysts, Journal Year: 2021, Volume and Issue: 11(6), P. 653 - 653

Published: May 21, 2021

The abatement of the pollutants deriving from diesel engines in vehicle sector still represents an interesting scientific and technological challenge due to increasingly limiting regulations. Meeting stringent limits NOx soot emissions requires a catalytic system with great complexity, size units, number as well increased fuel consumption. Thus, after-treatment device for use integrated catalyst technology reduction individual exhaust gas. representative technologies devoted under lean-burn operation conditions are selective (SCR) lean trap (LNT), while removal is mainly performed by filters (DPF). These devices normally used sequence, or combination them has been proposed overcome drawbacks devices. This review summarizes current state strategies. main focus this on combined (i.e., LNT–SCR) simultaneous soot, like SCR-on-Filter (SCRoF), series LNT/DPF SCR/DPF, SCR/DPF hybrid systems.

Language: Английский

Citations

41
Insight into solid-state ion-exchanged Cu-based zeolite (SSZ-13, SAPO-18, and SAPO-34) catalysts for the NH3-SCR reaction: The promoting role of NH4-form zeolite substrates DOI
Shoute Zhang, Junwu Chen, Ying Meng

et al.

Applied Surface Science, Journal Year: 2021, Volume and Issue: 571, P. 151328 - 151328

Published: Sept. 20, 2021

Language: Английский

Citations

39
Mechanism of NH3–Selective Catalytic Reduction (SCR) of NO/NO2 (Fast SCR) over Cu-CHA Zeolites Studied by In Situ/Operando Infrared Spectroscopy and Density Functional Theory DOI
Chong Liu, Grazia Malta,

Hiroe Kubota

et al.

The Journal of Physical Chemistry C, Journal Year: 2021, Volume and Issue: 125(40), P. 21975 - 21987

Published: Sept. 30, 2021

In situ/operando infrared (IR) spectroscopy, kinetics, and density functional theory (DFT) calculations were combined to propose a comprehensive mechanistic model of the selective catalytic reduction (SCR) NO/NO2 mixture by NH3, so-called fast SCR, over Cu-CHA zeolites. Steady-state kinetics for standard SCR H-CHA show that promotional effect NO2 on is less significant than H-CHA, suggesting Brønsted acid site (BAS; H+OZ–) important in chemistry. situ IR experiments disproportionates NO+ cation-exchange (NO+OZ–) CHA NO3– CuII sites. Operando studies under transient or temperature-programmed surface reaction conditions indicate NO+OZ– intermediate reduced NH3 yield N2 below 200 °C, while rather stable NO afford NO+OZ–. BASs, Cu sites, promote side reactions via ammonium nitrate (NH4NO3). The dual-site (CuII BAS sites) mechanism was verified DFT calculations. First, two molecules are converted nitrous (HONO) site, which then HONO regenerate site. reacts with NO+OZ–, produce H2O, nitrosamide (NH2NO), along regeneration BAS.

Language: Английский

Citations

36
A review on the characterization of metal active sites over Cu-based and Fe-based zeolites for NH3-SCR DOI Creative Commons
Jialing Chen,

Wei Huang,

Sizhuo Bao

et al.

RSC Advances, Journal Year: 2022, Volume and Issue: 12(43), P. 27746 - 27765

Published: Jan. 1, 2022

Cu-based and Fe-based zeolites are promising catalysts for NH3-SCR due to their high catalytic activity, wide temperature window good hydrothermal stability, while the detailed investigation of mechanism should be based on accurate determination active metal sites. This review systematically summarizes qualitative quantitative sites in or reactions advanced characterization methods such as UV-vis absorption (UV-vis), temperature-programmed reduction with H2 (H2-TPR), X-ray photoelectron spectroscopy (XPS), fine structure (XAFS), Infrared (IR), Electron paramagnetic resonance (EPR), Mössbauer DFT calculations. The application limitations different also discussed provide insights further study reaction over metal-based zeolites.

Language: Английский

Citations

29