Pollution by nitrogen oxides: an approach to NOx abatement by using sorbing catalytic materials

García, Miguel A.; Pitchon, V.; Kiennemann, A.

doi:10.1016/j.envint.2004.09.006

Cited by 225 publications

(134 citation statements)

References 130 publications

Supporting

Mentioning

131

Contrasting

Unclassified

Order By: Relevance

“…3,4,7,[13][14][15][16][17][18][19] Among the catalysts proposed for HC-SCR technology, zeolitic oxide catalysts are effective for NO x reduction, while their water tolerance has been little improved. 5 Noble metal catalysts such as Pt/Al 2 O 3 exhibit high deNO x activity in the low temperature range of 200-300 1C while exhibiting a narrow operation temperature window.…”

Section: Introductionmentioning

confidence: 99%

Environmentally-benign catalysts for the selective catalytic reduction of NO_xfrom diesel engines: structure–activity relationship and reaction mechanism aspects

2014

View full text Add to dashboard Cite

Selective catalytic reduction of NO x using NH 3 or hydrocarbons (NH 3 -SCR or HC-SCR) in oxygen-rich exhaust from diesel engines remains a major challenge in environmental catalysis. The development of highly efficient, stable and environmentally-benign catalysts for SCR processes is very important for practical use. In this feature article, the structure-activity relationship of vanadium-free catalysts in the NH 3 -SCR reaction is discussed in detail, including Fe-, Ce-based oxide catalysts and Fe-, Cu-based zeolite catalysts, which is beneficial for catalyst redesign and activity improvement. Based on our research, a comprehensive mechanism contributing to the performance of Ag/Al 2 O 3 in HC-SCR is provided, giving a clue to the design of a catalytic system with high efficiency.

show abstract

Section: Introductionmentioning

confidence: 99%

Environmentally-benign catalysts for the selective catalytic reduction of NO_xfrom diesel engines: structure–activity relationship and reaction mechanism aspects

2014

View full text Add to dashboard Cite

show abstract

“…The ZSM-5 zeolites exchanged with Cu demonstrated remarkable activity not only in the reduction of nitrogen oxides with NH 3 (NH 3 -SCR) [15,16] but also in the direct decomposition of NO [17,18]. This can be a good starting point to explore further the synthesis and structure correlations as well as the principles of hydrothermal stability of zeolites.…”

Section: Introductionmentioning

confidence: 99%

Prospective Catalytic Structured Converters for NH3-SCR of NOx from Biogas Stationary Engines: In Situ Template-Free Synthesis of ZSM-5 Cu Exchanged Catalysts on Steel Carriers

et al. 2013

View full text Add to dashboard Cite

The main objective of this study is to develop highly active catalyst and its preparation method that would meet the requirements of steel carriers for shortchannel structured converters for NO x abatement from stationary biogas engines. The in situ synthesis was applied to deposit a series of Cu-exchanged MFI zeolite (ZSM-5) on kanthal sheets. The samples differ in preparation conditions: organic template assisted and template-free synthesis, Si/Al ratio and catalyst carrier pretreatment (calcined vs. non-calcined). Dip-coating method was used as a reference to compare loading efficiency. In order to evaluate preparation quality and purity of resulting structure the samples were examined by XRD and SEM/EDS at various stages of preparation. For the assessment of mechanical endurance of the deposited catalyst layers the ultrasonication method was used. The results demonstrated high depositing efficiency of the in situ synthesis as well as high activity and selectivity of the Cu-exchanged MFI samples prepared without costly organic template.

show abstract

“…Both EPA and EEA established the hourly NOx air concentration limit at 0.1 ppm and 0.2 ppm, respectively. Even though processes such as selective catalytic and non-catalytic reduction of NOx were implemented to reduce the end of pipe emissions [3,4], photocatalysis with titanium dioxide (TiO2) is now being seen as a very promising approach to decompose these pollutants [5][6][7]. In fact, solar photoabatement of pollutants uses the sun as energy source and works at atmospheric conditions degrading pollutants present in low atmospheric concentrations.…”

Section: Introductionmentioning

confidence: 99%

Highly active photocatalytic paint for NOx abatement under real-outdoor conditions

Ângelo

Andrade

Mendes

2014

Applied Catalysis A: General

View full text Add to dashboard Cite

In this work the photocatalytic activity of paints incorporating commercial titanium dioxide for outdoor nitrogen oxide (NO) photoabatement is assessed. The paint acts as a 3D support of the photocatalyst and thus allows a larger amount of TiO2 nanoparticles to absorb light and to contact with pollutants, when compared with a 2D photocatalytic surface. NO conversion and selectivity towards nitrites and nitrates were determined according to the standard ISO 22197-1:2007 (E).Paint coatings were formulated and tested under laboratory and outdoor conditions. The best paint formulation incorporates CristalACTiV TM PC500 photocatalyst from Cristal and calcium carbonate extender, presenting a NO conversion of ca. 70% and a selectivity of ca. 40% under laboratory conditions. The same photocatalyst but characterized in the form of an optically thick film of compressed powder presented ca. 95% and 45% of conversion and selectivity, respectively. Under the real-outdoor conditions, the best performing paint showed a NO conversion of about 95%.

show abstract

Pollution by nitrogen oxides: an approach to NOx abatement by using sorbing catalytic materials

Cited by 225 publications

References 130 publications

Environmentally-benign catalysts for the selective catalytic reduction of NO_xfrom diesel engines: structure–activity relationship and reaction mechanism aspects

Environmentally-benign catalysts for the selective catalytic reduction of NO_xfrom diesel engines: structure–activity relationship and reaction mechanism aspects

Prospective Catalytic Structured Converters for NH3-SCR of NOx from Biogas Stationary Engines: In Situ Template-Free Synthesis of ZSM-5 Cu Exchanged Catalysts on Steel Carriers

Highly active photocatalytic paint for NOx abatement under real-outdoor conditions

Contact Info

Product

Resources

About

Pollution by nitrogen oxides: an approach to NOx abatement by using sorbing catalytic materials

Cited by 225 publications

References 130 publications

Environmentally-benign catalysts for the selective catalytic reduction of NOxfrom diesel engines: structure–activity relationship and reaction mechanism aspects

Environmentally-benign catalysts for the selective catalytic reduction of NOxfrom diesel engines: structure–activity relationship and reaction mechanism aspects

Prospective Catalytic Structured Converters for NH3-SCR of NOx from Biogas Stationary Engines: In Situ Template-Free Synthesis of ZSM-5 Cu Exchanged Catalysts on Steel Carriers

Highly active photocatalytic paint for NOx abatement under real-outdoor conditions

Contact Info

Product

Resources

About

Environmentally-benign catalysts for the selective catalytic reduction of NO_xfrom diesel engines: structure–activity relationship and reaction mechanism aspects

Environmentally-benign catalysts for the selective catalytic reduction of NO_xfrom diesel engines: structure–activity relationship and reaction mechanism aspects