Mn-based catalysts supported on γ-Al2O3, TiO2 and MCM-41: a comparison for low-temperature NO oxidation with low ratio of O3/NO

Liu, Lijun; Shen, Boxiong; Meng, Shaoping; Yuan, Peng; Lu, Fengju; Gao, Hongpei; Yao, Yan; Cai, Liang; Xu, Hongjie

doi:10.1039/d1ra01820e

Cited by 11 publications

(1 citation statement)

References 80 publications

(117 reference statements)

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“…For V/MCM-41, only a broad diffraction peak at 2θ of 22.0 • is observed, which is correlated to amorphous SiO 2 (JCPDS PDF No. 29-0085) [25]. In addition, no distinct diffraction peaks of vanadium species are observed in the presented XRD patterns, indicating that the vanadium species may be in an amorphous state or highly dispersed on the zeolite surfaces.…”

Section: Textural Propertiesmentioning

confidence: 74%

Soot Oxidation in a Plasma-Catalytic Reactor: A Case Study of Zeolite-Supported Vanadium Catalysts

Zhu

Luo

et al. 2022

Catalysts

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The plasma-catalytic oxidation of soot was studied over zeolite-supported vanadium catalysts, while four types of zeolites (MCM-41, mordenite, USY and 5A) were used as catalyst supports. The soot oxidation rate followed the order of V/MCM-41 > V/mordenite > V/USY > V/5A, while 100% soot oxidation was achieved at 54th min of reaction over V/MCM-41 and V/mordenite. The CO2 selectivity of the process follows the opposite order of oxidation rate over the V/M catalyst. A wide range of catalyst characterizations including N2 adsorption–desorption, XRD, XPS, H2-TPR and O2-TPD were performed to obtain insights regarding the reaction mechanisms of soot oxidation in plasma-catalytic systems. The redox properties were recognized to be crucial for the soot oxidation process. The effects of discharge power, gas flow rate and reaction temperature on soot oxidation were also investigated. The results showed that higher discharge power, higher gas flow rate and lower reaction temperature were beneficial for soot oxidation rate. However, these factors would impose a negative effect on CO2 selectivity. The proposed “plasma-catalysis” method possessed the unique advantages of quick response, mild operation conditions and system compactness. The method could be potentially applied for the regeneration of diesel particulate filters (DPF) at low temperatures and contribute to the the emission control of diesel engines.

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Section: Textural Propertiesmentioning

confidence: 74%

Soot Oxidation in a Plasma-Catalytic Reactor: A Case Study of Zeolite-Supported Vanadium Catalysts

Zhu

Luo

et al. 2022

Catalysts

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show abstract

Degradation of polyvinyl alcohol (PVA) in neutral conditions based on copper-manganese bimetallic catalyst

Han,

Sun,

Zhang

et al. 2023

Environ Sci Pollut Res

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Mn-doped Ca2Fe2O5 oxygen carrier for chemical looping gasification of biogas residue: Effect of oxygen uncoupling

Yan

Liu

Wang

et al. 2022

Chemical Engineering Journal

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Mn-based catalysts supported on γ-Al₂O₃, TiO₂ and MCM-41: a comparison for low-temperature NO oxidation with low ratio of O₃/NO

Abstract: The Mn/γ-Al2O3 catalyst exhibited excellent performance for NO conversion in the presence of a low ratio of O3/NO, which was due to the coexistence of Mn3+ and Mn4+ and abundant chemically adsorbed oxygen.

Cited by 11 publications

References 80 publications

Soot Oxidation in a Plasma-Catalytic Reactor: A Case Study of Zeolite-Supported Vanadium Catalysts

Soot Oxidation in a Plasma-Catalytic Reactor: A Case Study of Zeolite-Supported Vanadium Catalysts

Degradation of polyvinyl alcohol (PVA) in neutral conditions based on copper-manganese bimetallic catalyst

Mn-doped Ca2Fe2O5 oxygen carrier for chemical looping gasification of biogas residue: Effect of oxygen uncoupling

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