SO2 promoted alkali metal doped Ag/Al2O3 catalysts for CH4-SCR of NOx

Rao, Komateedi N.; Ha, Heon Phil

doi:10.1016/j.apcata.2012.05.012

Cited by 13 publications

(6 citation statements)

References 36 publications

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“…Sulfur resistance of catalyst is enhanced by adding alkali metals on Ag/γ-Al 2 O 3 catalyst due to the increase of intermediates [96]. The SO 2 -TPD results show that the addition of K inhibits the accumulation of sulfur compounds on Ag/Al 2 O 3 in HC-SCR, thereby increasing the stability in SO 2 atmosphere [101]. In the reduction of NO by CO and naphthalene reaction on Cu/Ce/TiO 2 -SiO 2 , K reduces the oxidation of naphthalene, thereby promoting the reduction of NO [102].…”

Section: Promotion Effects Of K On Reaction Process and Catalyst Propertiesmentioning

confidence: 99%

Application Prospect of K Used for Catalytic Removal of NOx, COx, and VOCs from Industrial Flue Gas: A Review

Shi

et al. 2021

Catalysts

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NOx, COx, and volatile organic compounds (VOCs) widely exist in motor vehicle exhaust, coke oven flue gas, sintering flue gas, and pelletizing flue gas. Potassium species have an excellent promotion effect on various catalytic reactions for the treatment of these pollutants. This work reviews the promotion effects of potassium species on the reaction processes, including adsorption, desorption, the pathway and selectivity of reaction, recovery of active center, and effects on the properties of catalysts, including basicity, electron donor characteristics, redox property, active center, stability, and strong metal-to support interaction. The suggestions about how to improve the promotion effects of potassium species in various catalytic reactions are put forward, which involve controlling carriers, content, preparation methods and reaction conditions. The promotion effects of different alkali metals are also compared. The article number about commonly used active metals and promotion ways are also analyzed by bibliometric on NOx, COx, and VOCs. The promotion mechanism of potassium species on various reactions is similar; therefore, the application prospect of potassium species for the coupling control of multi-pollutants in industrial flue gas at low-temperature is described.

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Section: Promotion Effects Of K On Reaction Process and Catalyst Propertiesmentioning

confidence: 99%

Application Prospect of K Used for Catalytic Removal of NOx, COx, and VOCs from Industrial Flue Gas: A Review

Shi

et al. 2021

Catalysts

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“…Alkali metal doping is one of the modification methods. For example, Rao and Ha reported that Cs–Ag/Ag/Al 2 O 3 showed promoted NO x conversion in the presence of SO 2 and H 2 O due to its higher NO adsorption capacity . The study by Son et al also proposed that the introduction of Cs can promote the dispersion of Ag nanoparticles on Al 2 O 3 , thereby increasing the activity of C 3 H 6 to reduce NO .…”

Section: Environmental Catalytic Applicationsmentioning

confidence: 99%

“…For example, Rao and Ha reported that Cs−Ag/Ag/Al 2 O 3 showed promoted NO x conversion in the presence of SO 2 and H 2 O due to its higher NO adsorption capacity. 191 The study by Son et al also proposed that the introduction of Cs can promote the dispersion of Ag nanoparticles on Al 2 O 3 , thereby increasing the activity of C 3 H 6 to reduce NO. 192 On the other hand, the modification of supports with metal oxides has been extensively studied to improve the sulfur/water tolerance and activity of Ag/Al 2 O 3 .…”

Section: Catalytic Reductionmentioning

confidence: 99%

Engineering Noble Metal Nanomaterials for Pollutant Decomposition

Lin

Cao

Yao

et al. 2020

Ind. Eng. Chem. Res.

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With the development of the chemical industry, more pollutants are produced in the environment, some of which are difficult to degrade by traditional biological treatment methods. Catalysis can directly degrade pollutants into products with less impact on the environment. In the past two decades, due to their unique physical and chemical properties, noble metal nanomaterials (NMNs) have been widely used as highly efficient catalysts in environmental catalysis for water and air pollutant treatment. The properties of NMNs are highly dependent on their parameters, including size, composition, and support, which can be readily used to improve the efficiency of NMNs-based catalysts. In this review, we discuss the effects of size, composition, and support on the catalytic performance of NMNs based on different environmental catalytic methods and characteristic pollutants in water and air. In addition, we focus on the mechanism of environmental catalysis and the relationship between catalytic performance and the properties of the catalysts and the chemical nature of the pollutants. We hope that this review will provide guidance for the design of NMNs-based catalysts for pollutant decomposition.

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“…Methane being the most abundant hydrocarbon in the form of natural gas offers a very attractive alternative for NO x reduction. CH 4 −SCR was investigated mainly over zeolites (e. g., Co−CHA, Co−RTH, Co−UFI, [81] supported noble metals (e. g., Ag/Al 2 O 3 , Pt/Al 2 O 3 [82,83] ), and metal oxides (e. g., CoO x /γ‐alumina, CoO/ZrO 2 (SO 4 2− ) [84,85] ). Kumthekar and Ozkan [25,86] investigated CH 4 −SCR over Pd/TiO 2 with palladium primarily in metallic form.…”

Section: Selective No Reductionmentioning

confidence: 99%

An Application of Steady‐state Isotopic‐transient Kinetic Analysis (SSITKA) in DeNO_x Process

Jabłońska

2020

ChemCatChem

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This Minireview presents an overview of the advancement and capabilities of the steady‐state isotopic transient kinetic analysis in the selective catalytic reduction of NOx. Firstly, a brief overview of the method and the kinetic parameters of catalyst‐surface reaction intermediates, including concentration and coverage of surface intermediates, surface residence time and intrinsic turnover frequency (TOF), is provided. Furthermore, the focus is on the application of SSITKA or a unique combination of SSITKA‐DRIFTS for the identification of active and/or inactive (spectators) species in NH3−SCR, H2−SCR and HCs−SCR. Different forms of adsorbed species and their formation rates revealing the main elementary steps on the catalyst's surface involving labeled molecules are discussed. The emphasis is laid on the optimization and design of industrial catalysts.

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SO2 promoted alkali metal doped Ag/Al2O3 catalysts for CH4-SCR of NOx

Cited by 13 publications

References 36 publications

Application Prospect of K Used for Catalytic Removal of NOx, COx, and VOCs from Industrial Flue Gas: A Review

Application Prospect of K Used for Catalytic Removal of NOx, COx, and VOCs from Industrial Flue Gas: A Review

Engineering Noble Metal Nanomaterials for Pollutant Decomposition

An Application of Steady‐state Isotopic‐transient Kinetic Analysis (SSITKA) in DeNO_x Process

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SO2 promoted alkali metal doped Ag/Al2O3 catalysts for CH4-SCR of NOx

Cited by 13 publications

References 36 publications

Application Prospect of K Used for Catalytic Removal of NOx, COx, and VOCs from Industrial Flue Gas: A Review

Application Prospect of K Used for Catalytic Removal of NOx, COx, and VOCs from Industrial Flue Gas: A Review

Engineering Noble Metal Nanomaterials for Pollutant Decomposition

An Application of Steady‐state Isotopic‐transient Kinetic Analysis (SSITKA) in DeNOx Process

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An Application of Steady‐state Isotopic‐transient Kinetic Analysis (SSITKA) in DeNO_x Process