Effects of O2, CO2 and H2O on NOx adsorption and selective catalytic reduction over Fe/ZSM-5

Yang, Terris T.; Bi, Hsiaotao T.; Cheng, Xingxing

doi:10.1016/j.apcatb.2010.11.038

Cited by 56 publications

(25 citation statements)

References 32 publications

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“…Fe-containing catalysts have attracted much attention for NO-SCR [13][14][15][16] and NO x storage/reduction (NSR) [17], due to the low production of N 2 O [13] and high adsorption capacity of NO x [16]. In our previous study [18], Fe/ZSM-5 (Albemarle) exhibited unsatisfactory performance for NO x adsorption and catalytic reduction, although the adsorption capacity of the fine Fe/ZSM-5 (Albemarle) catalyst is 11.4 times that of fine Fe/ZSM-5 (PUC) at the same operating conditions. This finding suggests that the structure of the catalyst support 3 may exert a significant effect on the catalyst adsorption and reduction performance.…”

Section: Introductionmentioning

confidence: 99%

NOx adsorption and reduction with C3H6 over Fe/zeolite catalysts: Effect of catalyst support

Pan

Guo

2015

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

NOx adsorption and reduction with C3H6 over Fe/zeolite catalysts: Effect of catalyst support

Pan

Guo

2015

Chemical Engineering Journal

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“…It is known that the corrosion of structural materials is related to surface adsorption and other chemical reactions that happen in certain corrosive environments. Oxygen or water adsorption on transition metal surfaces is crucial to various surface processes such as oxidation, corrosion, and heterogeneous catalysis [4,5]. Chemical attack on a metal surface is boosted by the adsorption of water, as it can provide favorable conditions for a variety of surface reactions.…”

Section: Introductionmentioning

confidence: 99%

Effects of alloying on oxidation and dissolution corrosion of the surface of γ-Fe(111): a DFT study

et al. 2015

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Effects of alloying elements in popular steels on the oxidation and dissolution corrosion of the surface of γ-Fe(111) have been investigated by performing density functional theory calculations within the local density approximation. First, the segregation of alloying atoms as well as preferential adsorption sites for oxygen and water were carefully examined, and it was found that all of the alloying elements considered had a tendency to segregate to the surface, and that the most preferred adsorption sites were the hexagonal closed packed (hcp) site and the top site for oxygen and water, respectively. The adsorption energies that characterized the tendency for oxygen or water to be adsorbed on the alloy surface showed that all ten alloying elements (especially Cr, Si, and Cu) were able to inhibit the adsorption of oxygen, and that all of the alloying elements except for Nb, Mo, and Ti inhibited water adsorption. The electrode potentials, which indicate the electrochemical stabilities of the surfaces of the alloys, suggested that all of these alloying elements (especially Cr, Mo, and Si) were able to suppress the adsorption of oxygen and water on the investigated surfaces, except for Nb and Ti in the case of water adsorption. Density of states analysis further indicated that all ten alloying elements (especially Cr, Si, Mo, and Cu) enhanced the corrosion resistance of the fcc Fe substrate, except for Nb and Ti with respect to dissolution corrosion.

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“…NOx conversion was always observed to decrease significantly in the presence of moisture. [32][33][34][35] The catalysts were also irreversibly deactivated by SO 2 and/or H 2 O, with the decrease of NOx conversions by more than 50%. 32,34 Most laboratory studies were carried out using simulated gases without the presence of H 2 O and SO 2 .…”

Section: Introductionmentioning

confidence: 99%

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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Effects of O2, CO2 and H2O on NOx adsorption and selective catalytic reduction over Fe/ZSM-5

Cited by 56 publications

References 32 publications

NOx adsorption and reduction with C3H6 over Fe/zeolite catalysts: Effect of catalyst support

NOx adsorption and reduction with C3H6 over Fe/zeolite catalysts: Effect of catalyst support

Effects of alloying on oxidation and dissolution corrosion of the surface of γ-Fe(111): a DFT study

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

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