DME as Reductant for Continuous Lean Reduction of NO x over ZSM-5 Catalysts

Tamm, Stefanie; Ingelsten, Hanna Härelind; Palmqvist, Anders

doi:10.1007/s10562-008-9487-4

Cited by 10 publications

(4 citation statements)

References 12 publications

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“…Thus, the increased NO 2 concentration during the gas phase reactions likely causes the improved NO x conversion at 250°C. At a catalyst temperature of 350°C, however, the NO x conversion was shown to increase with higher DME concentrations in the feed gas in a previous study [14]. The amount of reducing agent can, thus, be regarded as limiting for the NO x conversion at 350°C in the presence of the gas phase reactions while the concentration of NO 2 is less important for the overall NO x conversion at this temperature.…”

Section: Catalyst Activitymentioning

confidence: 72%

Influence of Gas Phase Reactions on DME-SCR over γ-alumina

2011

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Section: Catalyst Activitymentioning

confidence: 72%

Influence of Gas Phase Reactions on DME-SCR over γ-alumina

2011

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“…56 Conversion of citral into menthol using a Zr-loaded zeolite beta was studied by Nie and coworkers. 54 Multiple studies of deNOx activity were conducted for Fe-ZSM-5, 57 Pd-ZSM-5, 58 Ag/Na-ZSM-5, 59 and Cu-ZSM-5 zeolites. 60 One of the less conventional applications of metal containing zeolites include their use for hydrogen storage.…”

Section: List Of Tablesmentioning

confidence: 99%

“…Zeolites have been widely studied as potential catalyst materials for controlling automotive gas emissions. 43,[58][59][60] Typically, the zeolite host is loaded with an active catalytic species such as a transition or precious metal. These metal-exchanged zeolites have been evaluated for deNOx catalytic processes ranging from direct decomposition of NOx to the selective catalytic reduction (SCR) of NOx with hydrocarbons, ammonia and/or urea.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of nanocrystalline and mesoporous zeolites

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Mesoporous aggregates of nanocrystalline zeolites with MFI and BEA frameworks have been synthesized using a one-pot and single structure directing agent. The effect of different reaction conditions, such as temperature, time, pH and water content, on the particle size, surface area and mesopore volume has been studied. Nanocrystalline and mesoporous ZSM-5, β and Y zeolites were modified with different transition metals and the resulting single-and double metal containing catalyst materials were characterized. Nanocrystalline Silicalite-1 zeolite samples with varying particle size were functionalized with different organosilane groups and the cytotoxic activity of the zeolite nanocrystals was studied as a function of particle size, concentration, organic functional group type, as well as the type of cell line. Framework stability of nanocrystalline NaY zeolite was tested under different pH conditions. The synthesized zeolites used in this work were characterized using a variety of physico-chemical methods, including powder X-ray diffraction, Solid State NMR, nitrogen sorption, electron microscopy, Inductively Coupled Plasma-Optical Emission Spectroscopy and X-ray Photoelectron Spectroscopy.

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“…When evaluating different potential DME-SCR catalysts, between 65 and 75% NO x reduction has been achieved over Co/Al 2 O 3 , MoO 3 /Al 2 O 3 , and pure Al 2 O 3 powder catalysts and under dry conditions [3,4]. In the presence of water, 40 and 28% NO x conversion has been shown over a powder Ga 2 O 3 /Al 2 O 3 and a monolith H-ZSM-5 catalyst, respectively [5,6].…”

Section: Introductionmentioning

confidence: 99%