Influence of CeO2modification on the properties of Fe2O3–Ti0.5Sn0.5O2catalyst for NO reduction by CO

Dong, Lihui; Zhang, Bing; Tang, Changjin; Li, Bin; Zhou, Liya; Gong, Fuzhong; Sun, B.Z.; Chen, Yi

doi:10.1039/c3cy00703k

Cited by 62 publications

(37 citation statements)

References 49 publications

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“…At the same time, bands at 2376 and 2315 cm -1 , which were due to the formation of gaseous CO 2 33, 49 , increased with temperature. These CO 2 bands could always be observed at very low temperatures 33,49 and then increased with the stronger CO oxidation. Band at 1688, which could be assigned as C=N modes of acinitro compounds or organic R-NO 2 species 46 , also increased due to stronger carbon-NO reaction at higher temperatures.…”

Section: In Situ Drifts Study Of the No X Adsorption-reduction Processmentioning

confidence: 91%

“…It could be assume that this species was a precursor or intermediate for the production of CO 2 +N 2 O. Similar assumptions were also made in literature49,50 .During the dynamic NO x adsorption-desorption process, the observed nitrogen oxo species were free nitrate ion, NO + and cis-N ). During the adsorption stage, NO was fed together with 5% O 2 , leading to a strong NO oxidation.…”

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confidence: 83%

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Nitrogen oxides reduction by carbon monoxide over semi-coke supported catalysts in a simulated rotary reactor: reaction performance under dry conditions

et al. 2016

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A novel rotary reactor was proposed for nitrogen oxides (NO x ) reduction by carbon monoxides (CO) in order to avoid the oxygen inhibition effect. NO x adsorption and reduction were separated into two different zones in the proposed rotary reactor. NO x in the flue gas was adsorbed onto the catalyst surface in the adsorption zone and then reduced by the reducing gas in the reduction zone. The performance of the proposed reaction process was investigated in a simulated rotary reactor. The catalysts used were lab synthesized, Fe and Co co-impregnated over activated semi-coke. The results showed an excellent NO x removal efficiency at 200 and 250℃. However, the NO x reduction efficiencies were always much lower than the removal efficiency. Most of the removed NO x was simply passed from the flue gas to the reducing gas. It is very important to feed great excess CO in the reduction zone, since CO tended to be firstly consumed by residue oxygen in the reduction zone and then be involved in the NO+CO reaction. In an in situ DRIFTs study of the dynamic NO x adsorptionreduction process, it was found that poor reduction and desorption behavior of the store nitrates was the bottleneck of the NO x adsorption-reduction process.

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Section: In Situ Drifts Study Of the No X Adsorption-reduction Processmentioning

confidence: 91%

mentioning

confidence: 83%

Nitrogen oxides reduction by carbon monoxide over semi-coke supported catalysts in a simulated rotary reactor: reaction performance under dry conditions

et al. 2016

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“…Developed from the TWC process, CO-deNO x is very suitable for NO x adsorption-reduction. This is because CO is inexpensive, can easily be produced, and cannot generate solid carbon deposits 10,13 upon reaction with NO. It is widely reported that transition metal oxides could catalyze the NO + CO reaction efficiently.…”

Section: Introductionmentioning

confidence: 99%

“…It is widely reported that transition metal oxides could catalyze the NO + CO reaction efficiently. In fact, Cu-, [14][15][16][17][18][19] Co-, [20][21][22] Fe-, 13 Ni-, 23 and Mn-based 14,24 oxides, as either loaded or non-loaded catalysts, exhibit excellent CO-deNO efficiency at temperatures between 150 and 300 C. Furthermore, CeO 2 , SnO 2 , or ZrO 2 mixed with transition metals and carbon supported metal catalysts also promote the efficient reaction of CO with NO. 17,[25][26][27] As for the mechanism of the NO + CO reaction, it is established that at relatively low temperatures, NO coordinates with the metal cation and generates nitrites.…”

Section: Introductionmentioning

confidence: 99%

“…17,[25][26][27] As for the mechanism of the NO + CO reaction, it is established that at relatively low temperatures, NO coordinates with the metal cation and generates nitrites. 5,13,28 Subsequently, the formed nitrites can react with CO to yield N 2 O and CO 2 . 5,28 However, as the temperature increases, the coordinated NO is transformed to nitrates that react with CO, generating N 2 and CO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Investigation of SO₂tolerance of Ce-modified activated semi-coke based catalysts for the NO + CO reaction

Wang

Cheng

et al. 2017

RSC Adv.

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A novel integrated rotary reactor for NOx reduction by CO and air preheating: NOx removal performance and mechanism

Sun

Cheng

et al. 2021

AIChE Journal

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A novel integrated rotary reactor for NOx reduction by CO and air preheating (iNA reactor) was proposed. NOx removal performance was investigated in a fixedbed reactor, which was used to simulate the working conditions change in the iNA reactor. Lab-synthesized Cu/FeCeO x were used as the catalyst. Two different modes were tested with the iNA reactor: short cycles and long cycles. Excellent NOx removal efficiencies of over 95% and 90% for short cycles and long cycles, respectively, were observed in the iNA reactor. Moreover, compared with the constant-temperature rotary reactor, better H 2 O and SO 2 resistances were also found in the iNA reactor.The reaction mechanism was proposed based on in situ diffuse reflectance infrared Fourier transform study. In the iNA process, NOx was stored as nitrates in the adsorption zone, and then decomposed rapidly by both high temperatures and CO, leading to the deep catalyst regeneration. Therefore, temperature swinging and the feed of CO were key to having high iNA reactor performance for NOx removal.

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Influence of CeO₂modification on the properties of Fe₂O₃–Ti_0.5Sn_0.5O₂catalyst for NO reduction by CO

Cited by 62 publications

References 49 publications

Nitrogen oxides reduction by carbon monoxide over semi-coke supported catalysts in a simulated rotary reactor: reaction performance under dry conditions

Nitrogen oxides reduction by carbon monoxide over semi-coke supported catalysts in a simulated rotary reactor: reaction performance under dry conditions

Investigation of SO₂tolerance of Ce-modified activated semi-coke based catalysts for the NO + CO reaction

A novel integrated rotary reactor for NOx reduction by CO and air preheating: NOx removal performance and mechanism

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Influence of CeO2modification on the properties of Fe2O3–Ti0.5Sn0.5O2catalyst for NO reduction by CO

Cited by 62 publications

References 49 publications

Nitrogen oxides reduction by carbon monoxide over semi-coke supported catalysts in a simulated rotary reactor: reaction performance under dry conditions

Nitrogen oxides reduction by carbon monoxide over semi-coke supported catalysts in a simulated rotary reactor: reaction performance under dry conditions

Investigation of SO2tolerance of Ce-modified activated semi-coke based catalysts for the NO + CO reaction

A novel integrated rotary reactor for NOx reduction by CO and air preheating: NOx removal performance and mechanism

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Influence of CeO₂modification on the properties of Fe₂O₃–Ti_0.5Sn_0.5O₂catalyst for NO reduction by CO

Investigation of SO₂tolerance of Ce-modified activated semi-coke based catalysts for the NO + CO reaction