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   Articles with "nh3 scr" as a keyword



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Effects of regeneration conditions on sulfated CuSSZ-13 catalyst for NH3-SCR

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recommendations! Published in 2019 at "Korean Journal of Chemical Engineering"

DOI: 10.1007/s11814-019-0307-x

Abstract: To understand the role of regeneration conditions on sulfur-poisoned Cu/SSZ-13 catalysts for NH3-SCR, the physicochemical characterizations and NO2 conversions were investigated. The sulfur-poisoned Cu/SSZ-13 catalysts were treated at different conditions as a function of temperature… read more here.

Keywords: regeneration conditions; nh3 scr; effects regeneration; regeneration ... See more keywords
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Phosphorus modified small-pore zeolites and their catalytic performances in ethanol conversion and NH3-SCR reactions

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recommendations! Published in 2019 at "Applied Catalysis A: General"

DOI: 10.1016/j.apcata.2019.02.026

Abstract: Abstract Small-pore zeolites, composed of 8-membered ring windows, exhibit high catalytic performances in the selective catalytic reduction of NOx with ammonia (NH3-SCR) and the light olefin production from methanol or ethanol (MTO or ETO). As… read more here.

Keywords: phosphorus modified; modified small; nh3 scr; pore zeolites ... See more keywords
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Effective catalysts for the low-temperature NH3-SCR process based on MCM-41 modified with copper by template ion-exchange (TIE) method

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recommendations! Published in 2018 at "Applied Catalysis B: Environmental"

DOI: 10.1016/j.apcatb.2018.06.052

Abstract: Abstract Effective catalysts for the low-temperature process of selective catalytic reduction of NO with ammonia (NH3-SCR) were obtained by deposition of copper species on MCM-41 using template ion-exchange method (TIE). It was shown that the… read more here.

Keywords: nh3 scr; process; low temperature; copper ... See more keywords
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Investigation of the robust hydrothermal stability of Cu/LTA for NH3-SCR reaction

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recommendations! Published in 2019 at "Applied Catalysis B: Environmental"

DOI: 10.1016/j.apcatb.2019.01.039

Abstract: Recently copper ion-exchanged LTA zeolites were proved to be robust for NH3-SCR reaction. In this study, Cu/LTA catalysts with Si/Al = 15 and Cu/Al = 0.4 were synthesized via incipient wetness impregnation (IWI) method, following degreening/hydrothermal aging at different temperatures (750,… read more here.

Keywords: hydrothermal stability; nh3 scr; scr reaction; stability ... See more keywords
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Precise control of post-treatment significantly increases hydrothermal stability of in-situ synthesized cu-zeolites for NH3-SCR reaction

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recommendations! Published in 2020 at "Applied Catalysis B: Environmental"

DOI: 10.1016/j.apcatb.2020.118655

Abstract: Abstract The origin of the beneficial effects of post-treatment processing with HNO3 and NH4NO3 solutions on the catalytic performance of copper-amine templated zeolites used in the NH3-SCR reaction was investigated. By careful design and optimization… read more here.

Keywords: nh3 scr; treatment; ssz catalysts; scr reaction ... See more keywords
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The promoted performance of CeO2 catalyst for NH3-SCR reaction by NH3 treatment

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recommendations! Published in 2018 at "Applied Surface Science"

DOI: 10.1016/j.apsusc.2018.08.114

Abstract: Abstract In this study, NH3 treatment of CeO2 was found to significantly enhance its NH3-SCR performance. The NH3-treated CeO2 was characterized by BET, XRD, TPR and XPS. The obtained results revealed the excellent SCR activity… read more here.

Keywords: ceo2 catalyst; nh3 scr; nh3 treatment; scr reaction ... See more keywords
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A dual-functional way for regenerating NH3-SCR catalysts while enhancing their poisoning resistance

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recommendations! Published in 2018 at "Catalysis Communications"

DOI: 10.1016/j.catcom.2018.08.028

Abstract: Abstract A new regeneration method was developed for reactivating poisoned commercial catalysts (V2O5-WO3/TiO2) for the NH3-SCR reaction. The proposed regeneration method can wash out poisons in relatively mild conditions, and also in situ enhance their… read more here.

Keywords: nh3 scr; regeneration method; dual functional; functional way ... See more keywords
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Steady-state NH3-SCR global model and kinetic parameter estimation for NOx removal in diesel engine exhaust aftertreatment with Cu/chabazite

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recommendations! Published in 2017 at "Catalysis Today"

DOI: 10.1016/j.cattod.2017.04.011

Abstract: Abstract A steady-state global kinetic model for the NOx NH3-SCR reaction system, including NH3 oxidation, NO oxidation, standard SCR reaction, fast SCR reaction, NO2 SCR reaction, and N2O formation and decomposition is proposed, based on… read more here.

Keywords: estimation; nh3 scr; scr reaction; model ... See more keywords
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The role of alkali metal ions on hydrothermal stability of Cu/SSZ-13 NH3-SCR catalysts

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recommendations! Published in 2020 at "Catalysis Today"

DOI: 10.1016/j.cattod.2019.06.074

Abstract: Abstract Cu/SSZ-13 has considered being a good candidate for NH3-SCR catalysts. However, in real world, Cu/SSZ-13 inevitably expose to alkali metals deposit and hydrothermal aging, and hence, the role of alkali ions (Na+ and K+)… read more here.

Keywords: hydrothermal stability; nh3 scr; stability ssz; ssz ... See more keywords
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Theory and practice of metal oxide catalyst design for the selective catalytic reduction of NOx with NH3

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recommendations! Published in 2020 at "Catalysis Today"

DOI: 10.1016/j.cattod.2020.05.015

Abstract: Abstract For NOx control in the presence of excess oxygen, selective catalytic reduction with ammonia (NH3-SCR) has been successfully applied in the purification of coal-fired flue gas and diesel vehicle exhaust on a large scale.… read more here.

Keywords: catalytic reduction; scr; nh3 scr; selective catalytic ... See more keywords
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Effect of preparation method on NH3-SCR activity of Cu-LTA catalysts

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recommendations! Published in 2020 at "Catalysis Today"

DOI: 10.1016/j.cattod.2020.08.030

Abstract: Abstract The preparation method effect on the catalytic properties and hydrothermal stability of copper-loaded LTA (Cu-LTA) zeolites for the selective catalytic reduction of NOx with NH3 (NH3-SCR) has been investigated. Copper nitrate and liquid-state ion… read more here.

Keywords: nh3 scr; activity lta; preparation method; lta ... See more keywords