Promotion of redox and stability features of doped Ce–W–Ti for NH3-SCR reaction over a wide temperature range

Zhao, Kun; Han, Wei; Lü, Gongxuan; Lu, Jiangyin; Tang, Zhicheng; Zhen, Xinping

doi:10.1016/j.apsusc.2016.04.090

Cited by 74 publications

(24 citation statements)

References 43 publications

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“…Moreover, Ce0.2W0.2Ti showed the smallest average pore diameter of 3.9 nm compared to the other samples. Zhao et al also reported that the decrease of average pore diameter and pore volume could improve the performance of the NH3-SCR process [32].…”

Section: Xrd Analysismentioning

confidence: 98%

Selective Catalytic Reduction of NO with NH3 over Ce-W-Ti Oxide Catalysts Prepared by Solvent Combustion Method

et al. 2018

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In this work, a series of Ce-W-Ti catalysts were synthesized using a solution combustion method for the selective catalytic reduction (SCR) of NO with NH3 at low temperatures. The reaction performance of NH3-SCR of NO was significantly improved over the Ce-W-Ti catalysts compared to Ce0.4Ti and W0.4Ti catalysts, while Ce0.2W0.2Ti showed the best activity among all the samples. The Ce0.2W0.2Ti catalyst exhibited over 90% removal of NO and 100% N2 selectivity in the temperature range of 250–400 °C at a gas hourly space velocity (GHSV) of 120,000 mL·g−1·h−1. The Ce-W-Ti catalysts were characterized using N2 adsorption-desorption, X-ray diffraction, X-ray photoelectron spectrometry and temperature programmed desorption of NH3 to establish the structure-activity relationships of the Ce-W-Ti catalysts. The excellent catalytic performance of the Ce0.2W0.2Ti catalyst could be associated with the larger specific surface area, highly dispersed Ce and W species, increased amount of surface adsorbed oxygen (Oads) and enhanced total acidity on the catalyst surfaces.

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Section: Xrd Analysismentioning

confidence: 98%

Selective Catalytic Reduction of NO with NH3 over Ce-W-Ti Oxide Catalysts Prepared by Solvent Combustion Method

et al. 2018

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“…7. Each catalyst sample contained a broad NH 3 desorption peak, which could be assigned to the weakly absorbed NH 3 on the Brønsted acid sites (Sang et al, 2012;Zhao et al, 2016). The other small peak centered at about Fig.…”

Section: Nh3-tpd Analysismentioning

confidence: 99%

“…600°C was associated with the strongly absorbed NH 3 on the Lewis acid sites (Sang et al, 2012;Zhao et al, 2016). After HCl treatment, there was almost no change on NH 3 desorbed on the Brønsted acid sites, while a noticeable increase in NH 3 desorbed on the Lewis acid sites.…”

Section: Nh3-tpd Analysismentioning

confidence: 99%

Enhanced Low-temperature NH3-SCR Activity over Ce-Ti Oxide Catalysts by Hydrochloric Acid Treatment

Jiang

Shi

et al. 2019

Aerosol Air Qual. Res.

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The effect of hydrochloric acid treatment on Ce-Ti oxides was investigated for selective catalytic reduction of NO with NH 3. The results showed that hydrochloric acid treatment had a positive effect on the low-temperature activity of Ce-Ti oxides. The improved activity of Ce-Ti oxides could be attributed to the increase in the concentration of Ce as well as the amount of Ce 3+ and chemisorbed oxygen on the catalyst surface. In addition, the enhanced Lewis acidity could improve NH 3 absorption, and was also a key factor to enhance the low-temperature activity of Ce-Ti oxides.

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“…[1][2][3][4][5][6] Therefore, many technologies have been developed to reduce the emission of NO x from coal-red power plants. [7][8][9] Compared with other de-nitrogen technologies, the selective catalytic reduction of NO x by NH 3 (NH 3 -SCR) has drawn increasing attention due to its high efficiency. 7 V 2 O 5 -WO 3 (MoO 3 )/TiO 2 is widely used as an NH 3 -SCR catalyst due to its high NO x conversion and high anti-SO 2 poisoning.…”

Section: Introductionmentioning

confidence: 99%

Environment-friendly magnetic Fe–Ce–W catalyst for the selective catalytic reduction of NO_x with NH₃: influence of citric acid content on its activity-structure relationship

et al. 2018

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Promotion of redox and stability features of doped Ce–W–Ti for NH3-SCR reaction over a wide temperature range

Cited by 74 publications

References 43 publications

Selective Catalytic Reduction of NO with NH3 over Ce-W-Ti Oxide Catalysts Prepared by Solvent Combustion Method

Selective Catalytic Reduction of NO with NH3 over Ce-W-Ti Oxide Catalysts Prepared by Solvent Combustion Method

Enhanced Low-temperature NH3-SCR Activity over Ce-Ti Oxide Catalysts by Hydrochloric Acid Treatment

Environment-friendly magnetic Fe–Ce–W catalyst for the selective catalytic reduction of NO_x with NH₃: influence of citric acid content on its activity-structure relationship

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Promotion of redox and stability features of doped Ce–W–Ti for NH3-SCR reaction over a wide temperature range

Cited by 74 publications

References 43 publications

Selective Catalytic Reduction of NO with NH3 over Ce-W-Ti Oxide Catalysts Prepared by Solvent Combustion Method

Selective Catalytic Reduction of NO with NH3 over Ce-W-Ti Oxide Catalysts Prepared by Solvent Combustion Method

Enhanced Low-temperature NH3-SCR Activity over Ce-Ti Oxide Catalysts by Hydrochloric Acid Treatment

Environment-friendly magnetic Fe–Ce–W catalyst for the selective catalytic reduction of NOx with NH3: influence of citric acid content on its activity-structure relationship

Contact Info

Product

Resources

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Environment-friendly magnetic Fe–Ce–W catalyst for the selective catalytic reduction of NO_x with NH₃: influence of citric acid content on its activity-structure relationship