Layered copper manganese oxide for the efficient catalytic CO and VOCs oxidation

Wang, Yu; Yang, Dengyao; Li, Shaozhong; Zhang, Lingxia; Zheng, Guanyu; Guo, Limin

doi:10.1016/j.cej.2018.09.156

Cited by 217 publications

(53 citation statements)

References 64 publications

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“…It is generally accepted that O ads is one of the major factors affecting the catalytic oxidation activity of toluene by rease of promoting the degradation of carbon skeletons. [35,56] Figure 12 displays the relationship between toluene conversion and O ads concentrations, it is obviously observed that the higher the ratio of O ads /O latt , the lower T 50% and T 90% , which confirms that the presence of O ads will enhance the catalytic performance of catalyst. Therefore, it can be concluded that the enhanced catalytic performance of Ce x CoO, especially for Ce 0.05 CoO, may come from the improvement on the reducibility and the increase of active O ads species caused by Ce doping.…”

Section: Discussionmentioning

confidence: 88%

Preparation of mesoporous Ce_xCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping

Liu

Fan

Song

2020

Applied Organom Chemis

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Cobalt-based catalyst, as a typical catalyst for volatile organic compounds (VOCs) combustion, has attracted extensive attention. However, the catalytic activity of pure Co 3 O 4 is difficult to meet the requirements of practical application especially at low temperatures. Therefore, it is key to find an effective way to improve the catalytic performance of Co 3 O 4. In this paper, Co 3 O 4 is modified by engineering a combination of structural template and Ce dopant. The various characterization results verify that the template agent and the doping of appropriate Ce lead to great changes in the texture property and low temperature reducibility of Co 3 O 4 , thus resulting in superior catalytic performances of obtained mesoporous Ce x CoO catalysts. In particular, the best catalyst, Ce 0.05 CoO, achieves a toluene conversion of T 90% at 238 C, which is significantly lower than many of the Co-based catalysts reported in previous literatures. Furthermore, the toluene conversion rate maintains above 90% during 100 h at 238 C. The excellent catalytic performance of Ce 0.05 CoO can be attributed to its large specific surface area, uniform pore structure, good low temperature reducibility, and abundant surface oxygen species.

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Section: Discussionmentioning

confidence: 88%

Preparation of mesoporous Ce_xCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping

Liu

Fan

Song

2020

Applied Organom Chemis

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“…as Cu 2+ . Another relatively weak Cu 2p 3/2 peak at 931.1 eV and Cu 2p 1/2 at 951.1 eV is observed for the high Cu containing catalysts that can be due to the Cu + ions [42,43]. The O 1s XPS spectra of the samples can be broken down to three components as shown in Figure 7d.…”

Section: N 2 Adsorption-desorption Analysismentioning

confidence: 95%

A Novel Porous Ceramic Membrane Supported Monolithic Cu-Doped Mn–Ce Catalysts for Benzene Combustion

et al. 2019

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Porous ceramic membranes (PCMs) are considered as an efficient hot gas filtration material in industrial systems. Functionalization of the PCMs with high-efficiency catalysts for the abatement of volatile organic compounds (VOCs) during dust elimination is a promising way to purify the industrial exhaust gases. In this work, we prepared PCMs (porosity: 70%) in a facile sintering process and integrated Cu-doped Mn-Ce oxides into the PCMs as monolithic catalysts by the sol-gel method for benzene oxidation. Through this method, the catalysts are dispersed evenly throughout the PCMs with excellent adhesion, and the catalytic PCMs provided more active sites for the reactant gases during the catalytic reaction process compared to the powder catalysts. The physicochemical properties of PCMs and catalytic PCMs were characterized systematically, and the catalytic activities were measured in total oxidation of benzene. As a result, all the prepared catalytic PCMs exhibited high catalytic activity for benzene oxidation. Significantly, the monolithic catalyst of Cu 0.2 Mn 0.6 Ce 0.2 /PCMs obtained the lowest temperature for benzene conversion efficiency of 90% (T 90 ) at 212 • C with a high gaseous hourly space velocity of 5000 h −1 and showed strong resistance to high humidity (90 vol.%, 20 • C) with long-term stability in continuous benzene stream, which is caused by abundant active adsorbed oxygen, more surficial oxygen vacancy, and lower-temperature reducibility.higher conversion efficiency at lower temperature [13][14][15][16]. A successful catalyst used for industrial applications usually requires high activity, stability, heat resistance, and low pressure drop during long-term operation for high airflow gaseous catalytic combustion. Therefore, a monolithic catalyst by functionalizing the PCMs with catalytic active ingredients is much necessary for the removal of VOCs during dedusting for air pollution control in the industrial application.Currently, the transition metal oxide catalysts, by considering economical and effective elements, are better alternatives in contrast to the noble metal catalysts [17,18]. Among all the transition metals, the synergistic effect of Mn and Ce mixed oxides exhibited enhanced catalytic activity during benzene oxidation [19][20][21][22][23] that generally attributed to the abundance, low cost, numerous oxidation states, and high poison-resistance of manganese oxides [24,25], and the super oxygen storage capacity of ceria oxides which are regarded as viable segments in the VOCs oxidation [26,27]. Moreover, to further improve physiochemical properties, the ternary metal oxides catalysts (e.g., Mn-Ce-Co [28,29], Mn-Ce-Zr [30], Mn-Ce-Cu [31-33],) are popularly used in the field of VOCs removal. Such series of catalysts exhibit higher catalytic activity than binary and single metal oxides and show excellent stability and water vapor resistance properties during a long-term reaction due to the synergistic effects. The ionic radius of Cu is between the ionic radius of Mn and Ce, so the Cu ions ...

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“…As reported in previous studies, Mn-based catalysts showed higher activity to decompose VOCs [36] and O 3 [39] when compared to other transition metal oxides. Moreover, manganese oxide is also a preferred catalyst for the oxidation of CO to CO 2 , which is one of the major reactions in the reaction pathway of VOCs oxidation process [40,41]. Thus, Mn-based catalysts have a great potential to be used in the PPC configuration because of their advantages such as low cost, environmentally friendly, relatively high activity for VOCs removal, oxidation of CO, and efficient decomposition of O 3 at ambient temperature.…”

Section: Plasma Catalysis Systemmentioning

confidence: 99%

Mn-Based Catalysts for Post Non-Thermal Plasma Catalytic Abatement of VOCs: A Review on Experiments, Simulations and Modeling

Tian

Shen

et al. 2021

Plasma Chem Plasma Process

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The combination of non-thermal plasma (NTP) and catalyst characterized by high energy efficiency, enhanced volatile organic compounds (VOCs) removal efficiency, high product selectivity, and low production of unwanted and/or toxic by-products possesses a great promise for the abatement of VOCs. This work reviews the state of knowledge regarding Mn-based catalysts for VOCs abatement in the post-plasma-catalytic (PPC) system. First, the development and the performance of different Mn-based catalysts such as pure manganese oxide, mixed manganese oxide-based catalysts, and supported Mn-based catalysts in terms of VOCs abatement and O 3 decomposition are summarized. Then, the mechanism of the VOCs decomposition in the NTP and PPC system is discussed. Finally, the modeling and simulation of VOCs abatement in the NTP and PPC system are overviewed. This review aims at providing a reference guide for the development and optimization of VOCs abatement in the PPC system using Mn-based catalysts.

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Layered copper manganese oxide for the efficient catalytic CO and VOCs oxidation

Cited by 217 publications

References 64 publications

Preparation of mesoporous Ce_xCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping

Preparation of mesoporous Ce_xCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping

A Novel Porous Ceramic Membrane Supported Monolithic Cu-Doped Mn–Ce Catalysts for Benzene Combustion

Mn-Based Catalysts for Post Non-Thermal Plasma Catalytic Abatement of VOCs: A Review on Experiments, Simulations and Modeling

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Layered copper manganese oxide for the efficient catalytic CO and VOCs oxidation

Cited by 217 publications

References 64 publications

Preparation of mesoporous CexCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping

Preparation of mesoporous CexCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping

A Novel Porous Ceramic Membrane Supported Monolithic Cu-Doped Mn–Ce Catalysts for Benzene Combustion

Mn-Based Catalysts for Post Non-Thermal Plasma Catalytic Abatement of VOCs: A Review on Experiments, Simulations and Modeling

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Preparation of mesoporous Ce_xCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping

Preparation of mesoporous Ce_xCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping