Catalytic Decomposition of N2O over Cu–Zn/ZnAl2O4 Catalysts

Zheng, Xiaoying; Zhang, Runhu; Bai, Fengshan; Chen, Hua

doi:10.3390/catal7050166

Cited by 7 publications

(8 citation statements)

References 17 publications

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“…Under high reaction temperatures, catalysts have a decreased activity and a lower life‐time. Other limitations refer to the lack of studies clarifying which factors significantly influence the catalytic activity of the catalysts, 28 and the high costs of specific catalysts 29 . For instance, zeolite‐based catalyst have deactivation issues when in the presence of high amounts of water and oxygen, and can be used in a limited number of applications.…”

Section: Introductionmentioning

confidence: 99%

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Parametric study for N₂O conversion and reduction using cobalt‐oxide‐based catalysts

Rocha‐Meneses

Inayat

Ayoub

et al. 2022

Env Prog and Sustain Energy

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Nitrous oxide is a highly reactive gas with several well-known environmental impacts.Its presence in the atmosphere can decrease the stratospheric ozone levels, cause an increase in the greenhouse gas emissions, and contribute to acid-rain formation.Therefore, in this article, the potential and performance of different types of cobalt oxide (Co 3 O 4 ) catalysts in N 2 O decomposition and conversion was studied. For this, the catalytic activity of these materials was tested in a differential fixed-bed reactor, operated under steady state conditions. The results obtained in this study show reduced CoO achieved 100% N 2 O conversion at 250 C; that CoO has a great performance (>95%) in the absence of oxygen and humidity, regardless of the W/F; even at low space velocities (0.1 g Às /ml) and in the absence of humidity the N 2 O conversion efficiency is still very high (100%); 10%La/CoO has a higher catalytic activity than 10% Ba/CoO, 10% Na/CoO, and 10% W/CoO. The highest catalytic activity (>90%)

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Section: Introductionmentioning

confidence: 99%

“…29 For instance, zeolite-based catalyst have deactivation issues when in the presence of high amounts of water and oxygen, and can be used in a limited number of applications. Research has shown that there are limited studies on the development of N 2 O catalytic decomposition 30.…”

mentioning

confidence: 99%

Parametric study for N₂O conversion and reduction using cobalt‐oxide‐based catalysts

Rocha‐Meneses

Inayat

Ayoub

et al. 2022

Env Prog and Sustain Energy

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“…In recent years, many researches have been focused upon the adsorption and decomposition of N 2 O on various catalyst surfaces. Through the experimental studies, it is known that spinel Ni 0.75 Co 2.25 O 4 modified with cesium cations [7], Fe/SSZ-13 [8], Co–Mn–Al mixed oxides [9] and Cu–Zn/ZnAl 2 O 4 [10] have good catalytic effects on the N 2 O decomposition.…”

Section: Introductionmentioning

confidence: 99%

DFT Study of N2O Adsorption onto the Surface of M-Decorated Graphene Oxide (M = Mg, Cu or Ag)

et al. 2019

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In order to reduce the harm of nitrous oxide (N2O) on the environment, it is very important to find an effective way to capture and decompose this nitrous oxide. Based on the density functional theory (DFT), the adsorption mechanism of N2O on the surfaces of M-decorated (M = Mg, Cu or Ag) graphene oxide (GO) was studied in this paper. The results show that the effects of N2O adsorbed onto the surfaces of Mg–GO by O-end and Cu–GO by N-end are favorable among all of the adsorption types studied, whose adsorption energies are −1.40 eV and −1.47 eV, respectively. Both adsorption manners belong to chemisorption. For Ag–GO, however, both the adsorption strength and electron transfer with the N2O molecule are relatively weak, indicating it may not be promising for N2O removal. Moreover, when Gibbs free energy analyses were applied for the two adsorption types on Mg–GO by O-end and Cu–GO by N-end, it was found that the lowest temperatures required to undergo a chemisorption process are 209 °C and 338 °C, respectively. After being adsorbed onto the surface of Mg–GO by O-end, the N2O molecule will decompose into an N2 molecule and an active oxygen atom. Because of containing active oxygen atom, the structure O–Mg–GO has strong oxidizability, and can be reduced to Mg–GO. Therefore, Mg–GO can be used as a catalyst for N2O adsorption and decomposition. Cu–GO can be used as a candidate material for its strong adsorption to N2O.

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“…The catalyst activity, however, was found to be degraded in the presence of small amounts of oxygen and water vapor in the feed stream [33]. Zheng et al [34]…”

Section: Introductionmentioning

confidence: 99%

N2O Abatement over Ruthenium Supported on Highly Dispersed Hydrotalcite-Like Composite Metal Oxides

Zhang¹,

Guo²,

Li³

et al. 2019

Pol. J. Environ. Stud.

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Highly dispersive hydrotalcite-like composite metal oxides were prepared by coprecipitation method. CO 2-TPD characterization showed that the adsorption capacity over the samples at low (<300ºC) and middle (300~550ºC) temperatures was improved by using La or Cu to modify the sample of MgAlO, while slightly reduced at high temperature (>550ºC). The experimental results showed that the composite metal oxide, Me x O y (Me=La, Mg, Al), had relatively good performance on N 2 O decomposition. A series of Ru/Me x O y catalysts were prepared by programed impregnation method. CO 2-TPD analysis indicated that the samples of Ru/Me x O y not only increased the total CO 2 adsorption capacity, but also obviously enhanced CO 2 adsorption capacity at 300~550ºC compared with Me x O y. TEM characterization showed that the Ru component was uniformly loaded on the support surface under nanoscale. N 2 O catalytic decomposition showed that the suitable Ru loading on support was 2.0(wt.)%, i.e., Ru(2.0)/Me x O y. Under conditions of (v/v) 10% N 2 O+82% N 2 +5.0% O 2 +3.0% H 2 O, 30000h-1 of space velocity, 510ºC, the stability test showed that N 2 O conversion remained ca. 95.0%, indicating that Ru(2.0)/Me x O y had good stability and activity at relatively low temperature.

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Catalytic Decomposition of N2O over Cu–Zn/ZnAl2O4 Catalysts

Cited by 7 publications

References 17 publications

Parametric study for N₂O conversion and reduction using cobalt‐oxide‐based catalysts

Parametric study for N₂O conversion and reduction using cobalt‐oxide‐based catalysts

DFT Study of N2O Adsorption onto the Surface of M-Decorated Graphene Oxide (M = Mg, Cu or Ag)

N2O Abatement over Ruthenium Supported on Highly Dispersed Hydrotalcite-Like Composite Metal Oxides

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Catalytic Decomposition of N2O over Cu–Zn/ZnAl2O4 Catalysts

Cited by 7 publications

References 17 publications

Parametric study for N2O conversion and reduction using cobalt‐oxide‐based catalysts

Parametric study for N2O conversion and reduction using cobalt‐oxide‐based catalysts

DFT Study of N2O Adsorption onto the Surface of M-Decorated Graphene Oxide (M = Mg, Cu or Ag)

N2O Abatement over Ruthenium Supported on Highly Dispersed Hydrotalcite-Like Composite Metal Oxides

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Parametric study for N₂O conversion and reduction using cobalt‐oxide‐based catalysts

Parametric study for N₂O conversion and reduction using cobalt‐oxide‐based catalysts