NO reduction over nanostructure M-Cu/ZSM-5 (M: Cr, Mn, Co and Fe) bimetallic catalysts and optimization of catalyst preparation by RSM

Panahi, Parvaneh Nakhostin; Salari, Dariush; Niaei, Aligholi; Mousavi, Seyed Mahdi

doi:10.1016/j.jiec.2013.02.022

Cited by 75 publications

(20 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The patterns of Mn‐Fe/ZSM‐5 catalysts prepared by two different methods exhibited the typical peaks of HZSM‐5 at 8.0°, 8.8°, 23.2°, 24.0° and 24.5°, indicating that the structure of ZSM‐5 zeolite remained intact even after doping with Mn and Fe. For the two fresh catalysts, no detectable manganese or iron oxide phases can be found from XRD patterns, which may be due to the poor crystalline state or the fine dispersion of metal oxides on the catalyst surface …”

Section: Resultsmentioning

confidence: 82%

The SO₂ Resistance Improvement of Mn‐Fe/ZSM‐5 for NH₃‐SCR at Low Temperature by Optimizing Synthetic Method

Zou

Meng

et al. 2018

ChemistrySelect

View full text Add to dashboard Cite

Mn‐Fe/ZSM‐5 was prepared via co‐precipitation (CP) and precipitation–chemical vapor deposition (P‐CVD) methods. Catalytic performance investigation showed that Mn‐Fe/ZSM‐5 by P‐CVD method had higher catalytic activity and SO2 resistance than the ones by CP method for NH3‐SCR at low temperature. Characterization results proved that the amount of ammonium sulfate deposited on the surface of Mn‐Fe/ZSM‐5(P‐CVD) was less than that of Mn‐Fe/ZSM‐5(CP) catalyst. Further investigations revealed that the deposition and decomposition of ammonium sulfate proceeded in a dynamic balance on Mn‐Fe/ZSM‐5(P‐CVD) catalyst, which was crucial for the excellent catalytic performances in the presence of SO2 and H2O.

show abstract

Section: Resultsmentioning

confidence: 82%

The SO₂ Resistance Improvement of Mn‐Fe/ZSM‐5 for NH₃‐SCR at Low Temperature by Optimizing Synthetic Method

Zou

Meng

et al. 2018

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…It is clearly seen that the parent HZSM-5 ( Figure 2A) is mostly composed of irregularly localized, distinct edged, and bright polycrystalline aggregates within the regular geometry. [9] After Cu and/or Fe loading, the main morphology of Fe/ZSM-5, Cu/ ZSM-5, and Fe/Cu/ZSM-5 keeps almost unchanged, the only difference is that a small amount of aggregates composed of nanosized particles ( Figure 2B to 2D) which may be formed during calcination is emerged. Nevertheless, the synthesized FeCu-ZSM-5 ( Figure 2E to 2F) sample exhibits a distinctly different morphology.…”

Section: Resultsmentioning

confidence: 93%

“…[7] It is generally recognized that Cu-zeolites are more active at lower temperatures (< 300°C) while Fe-zeolites show better activity at higher temperatures (> 300°C). [9] As suggested by Zhang et al, by introducing iron into Cu/ZSM-5, FeÀ Cu nanocomposites were formed to change the electronic property, redox ability, and acidity so that the catalytic performance was improved. For example, Panahi et al reported that the bimetallic FeÀ Cu/ZSM-5 nanocatalyst possessed the highest catalytic activity for NO conversion among the different transition metal (Co, Mn, Cr, and Fe) modified Cu/ZSM-5 zeolites.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Panahi et al reported that the bimetallic FeÀ Cu/ZSM-5 nanocatalyst possessed the highest catalytic activity for NO conversion among the different transition metal (Co, Mn, Cr, and Fe) modified Cu/ZSM-5 zeolites. [9] As suggested by Zhang et al, by introducing iron into Cu/ZSM-5, FeÀ Cu nanocomposites were formed to change the electronic property, redox ability, and acidity so that the catalytic performance was improved. [10] Besides, Jouini et al investigated the effect of metal exchange order over CuÀ Fe-ZSM-5 and FeÀ Cu-ZSM-5 prepared by solidstate ion exchange.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Direct Synthesis of Hierarchical FeCu‐ZSM‐5 Zeolite with Wide Temperature Window in Selective Catalytic Reduction of NO by NH₃

Yue

Liu

et al. 2019

ChemCatChem

View full text Add to dashboard Cite

In this article, we report a one-pot synthesis strategy to directly synthesize the hierarchical FeCu-ZSM-5 zeolite. Its physicochemical properties were studied by various characterization techniques and catalytic performance was tested in selective catalytic reduction (SCR) of NO with NH 3 as reductant. The characterization results show that: compared with three reference zeolites Fe/ZSM-5, Cu/ZSM-5, and Fe/Cu/ZSM-5 prepared through an incipient wetness impregnation method, the synthesized FeCu-ZSM-5 zeolite exhibits hierarchical micro-mesoporous structures, more Fe 3 + in zeolite framework, and larger isolated Cu 2 + species. Therefore, when used as a catalyst in NH 3 -SCR, the resulting hierarchical FeCu-ZSM-5 catalyst shows better catalytic performance (high NO conversion and N 2 selectivity) in a wide temperature window and higher hydrothermal stability than the three reference catalysts. Our work provides a simple and facile route to prepare the promising NH 3 -SCR catalyst for practical applications in controlling NO x emissions.[a] Dr.

show abstract

“…Current research focuses on rare earth elements and cheap transition metals, rare earth elements, especially Ce, are widely studied in cheap transition metals, such as Cu, Fe, Mn, etc. [190][191][192].…”

Section: Co-scrmentioning

confidence: 99%

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Liu

et al. 2019

Catalysts

View full text Add to dashboard Cite

Nitrogen oxides (NO x ) represent one of the main sources of haze and pollution of the atmosphere as well as the causes of photochemical smog and acid rain. Furthermore, it poses a serious threat to human health. With the increasing emission of NO x , it is urgent to control NO x . According to the different mechanisms of NO x removal methods, this paper elaborated on the adsorption method represented by activated carbon adsorption, analyzed the oxidation method represented by Fenton oxidation, discussed the reduction method represented by selective catalytic reduction, and summarized the plasma method represented by plasma-modified catalyst to remove NO x . At the same time, the current research status and existing problems of different NO x removal technologies were revealed and the future development prospects were forecasted.Catalysts 2019, 9, 771 2 of 39 adsorption, oxidation, reduction, and plasma methods. In view of these attentive findings, adsorption method uses recyclable solid adsorbent material to adsorb NO x from flue gas through microporous structure, remarkably, environmentally friendly, no secondary pollution, and energy-saving and -efficient features make it stand out [18][19][20]. The oxidation process is a method that oxidizes NO into NO 2 or N 2 O 3 with high solubility under the action of an oxidant that is then absorbed by water or alkali solution. The process is simple and cost-saving, and is widely used in the wet flue gas denitrification process with relatively low cost and high removal efficiency of NO x ; except that the oxidized NO and SO 2 can be removed simultaneously to produce high value-added products [21][22][23]. The reduction method has the characteristics of high efficiency, cleanliness, and mildness; NO x removal can be realized at low temperature at present [24][25][26]. The plasma method is used to modify the surface of the catalyst, the dispersion of active species can be improved by plasma treatment, and the stability and low temperature activity of catalyst can be improved [27,28].Seldom, if ever, does a comprehensive article to introduce the current situation and treatment methods of removing NO x . In this paper, we tried to renovate, classify, and summarize the significant perspectives and most relevant findings reported in recent research articles and earlier reviews generalizing the mechanism analysis and research progress of NO x removal by adsorption, oxidation, reduction, and plasma methods, which can provide means for promoting the technological progress of pollution prevention, maintaining healthy development of factories continuously, studying the methods of removing NO x deeply, and mastering different technologies of removing NO x , as well as providing guidance for controlling the emission of NO x from motor vehicles such as diesel, gasoline, and so on. In order to improve the environmental quality and save the ecological environment, this paper further provides a convenient, low-cost, efficient, and economic guidance line.

show abstract

NO reduction over nanostructure M-Cu/ZSM-5 (M: Cr, Mn, Co and Fe) bimetallic catalysts and optimization of catalyst preparation by RSM

Cited by 75 publications

References 26 publications

The SO₂ Resistance Improvement of Mn‐Fe/ZSM‐5 for NH₃‐SCR at Low Temperature by Optimizing Synthetic Method

The SO₂ Resistance Improvement of Mn‐Fe/ZSM‐5 for NH₃‐SCR at Low Temperature by Optimizing Synthetic Method

Direct Synthesis of Hierarchical FeCu‐ZSM‐5 Zeolite with Wide Temperature Window in Selective Catalytic Reduction of NO by NH₃

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Contact Info

Product

Resources

About

NO reduction over nanostructure M-Cu/ZSM-5 (M: Cr, Mn, Co and Fe) bimetallic catalysts and optimization of catalyst preparation by RSM

Cited by 75 publications

References 26 publications

The SO2 Resistance Improvement of Mn‐Fe/ZSM‐5 for NH3‐SCR at Low Temperature by Optimizing Synthetic Method

The SO2 Resistance Improvement of Mn‐Fe/ZSM‐5 for NH3‐SCR at Low Temperature by Optimizing Synthetic Method

Direct Synthesis of Hierarchical FeCu‐ZSM‐5 Zeolite with Wide Temperature Window in Selective Catalytic Reduction of NO by NH3

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Contact Info

Product

Resources

About

The SO₂ Resistance Improvement of Mn‐Fe/ZSM‐5 for NH₃‐SCR at Low Temperature by Optimizing Synthetic Method

The SO₂ Resistance Improvement of Mn‐Fe/ZSM‐5 for NH₃‐SCR at Low Temperature by Optimizing Synthetic Method

Direct Synthesis of Hierarchical FeCu‐ZSM‐5 Zeolite with Wide Temperature Window in Selective Catalytic Reduction of NO by NH₃