Catalytic oxidation of benzene over alumina-supported Cu-Mn-Ce mixed oxide catalysts

Gao, Yang; Xiao, Jun; Ye, Jiandong; Huo, Xiaodong; Shen, Yutong

doi:10.1007/s11814-019-0428-2

Cited by 14 publications

(5 citation statements)

References 47 publications

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“…Scheme describes the typical reaction process of DCM in copper oxides. Lattice oxygen atoms of CuO x were highly active and participated in the oxidation reaction as a Mars-van Krevelen (MvK) mechanism . The as-formed oxygen vacancies were continuously replaced by chlorine atoms with large electronegativity, ultimately leading to the formation of copper chloride species.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Lattice oxygen atoms of CuO x were highly active and participated in the oxidation reaction as a Mars-van Krevelen (MvK) mechanism. 47 The asformed oxygen vacancies were continuously replaced by chlorine atoms with large electronegativity, ultimately leading to the formation of copper chloride species. Thus, the oxygen regeneration process was strongly inhibited at a low temperature, which resulted in the initial loss of the activity.…”

Section: Characterization On the State Of Copper Speciesmentioning

confidence: 99%

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Effects of Different Copper Species on the Combustion of Dichloromethane over Cu/HZSM-5 Zeolite Nanoporous Catalysts

Liu

Zhu

Huang

et al. 2021

ACS Appl. Nano Mater.

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This study compared the reaction behaviors of dichloromethane (DCM) catalytic combustion over Cu/HZSM-5 (H form of Zeolite Socony Mobil-5) nanoporous catalysts at different copper loadings. Among the samples investigated, Cu/HZSM-5 with 2.5 wt % Cu showed the best stability with a 90% DCM conversion at 320 °C during a 3 h reaction run. The analysis of the results showed different copper species (including cations and oxides particles) accounted for the diverse reaction behaviors observed. With a low copper loading (≤2.5 wt %), copper cations (such as isolated Cu + /Cu 2+ and oxocations) were the dominant copper species, which were strongly resistant to chlorine poisoning. However, we found the continuous coking deactivation of Cu/HZSM-5 with 1 wt % Cu loading owing to its low redox capacity. With further increase in the Cu content, the proportion of bulk-like CuO x species quickly increased. During the reaction with DCM, CuO x particles were involved in a chlorination process at a bulk level with the formation of CuCl x and Cu x (OH) y Cl crystalline phases, resulting in a rapid deactivation at the initial reaction stage. Cation-dominant copper nanomaterials are recommended for reaching a high stability in chlorinated volatile organic compound catalytic oxidation.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Characterization On the State Of Copper Speciesmentioning

confidence: 99%

Effects of Different Copper Species on the Combustion of Dichloromethane over Cu/HZSM-5 Zeolite Nanoporous Catalysts

Liu

Zhu

Huang

et al. 2021

ACS Appl. Nano Mater.

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“…To confirm the repeatability of the experiments, the same experiments were performed 6 times at the center point (Std no. 15–20) [ 30 ]. The responses were determined as GC and ED because KOH pretreatment was performed to increase GC by removing other portions (e.g., lignin) of CNS and improve ED of CNS.…”

Section: Resultsmentioning

confidence: 99%

Improvement of Enzymatic Glucose Conversion from Chestnut Shells through Optimization of KOH Pretreatment

Lee

et al. 2021

IJERPH

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Worldwide, about one-third of food produced for human consumption is wasted, which includes byproducts from food processing, with a significant portion of the waste still being landfilled. The aim of this study is to convert chestnut shells (CNSs) from food processing into a valuable resource through bioprocesses. Currently, one of the highest barriers to bioprocess commercialization is low conversion of sugar from biomass, and KOH pretreatment was suggested to improve enzymatic digestibility (ED) of CNS. KOH concentration of 3% (w/w) was determined as a suitable pretreatment solution by a fundamental experiment. The reaction factors including temperature, time and solid/liquid (S/L) ratio were optimized (77.1 g/L CNS loading at 75 °C for 2.8 h) by response surface methodology (RSM). In the statistical model, temperature and time showed a relatively significant effect on the glucan content (GC) and ED, but S/L ratio was not. GC and ED of the untreated CNS were 45.1% and 12.7%, respectively. On the other hand, GC and ED of pretreated CNS were 83.2% and 48.4%, respectively, and which were significantly improved by about 1.8-fold and 3.8-fold compared to the control group. The improved ED through the optimization is expected to contribute to increasing the value of byproducts generated in food processing.

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“…[6][7][8][9] For example, supported Mn is an important catalyst for the oxidation of benzene and chlorobenzene to produce cyclic oxygenated products. [10][11][12] In several cases, Mn is used along with other metals for the selective oxidation of cyclic aliphatic hydrocarbons. Supported Mn-Fe bimetallic catalysts have been reported to be more active in the oxidation of cyclohexane to produce cyclohexanone (K) and cyclohexanol (A).…”

Section: Introductionmentioning

confidence: 99%

The effect of MgO and preparation techniques of the FeMnO_δ/MgO–Al₂O₃ catalyst used for the vapor phase oxidation of cyclohexane

Yadav

Das

2022

React. Chem. Eng.

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Catalytic oxidation of benzene over alumina-supported Cu-Mn-Ce mixed oxide catalysts

Cited by 14 publications

References 47 publications

Effects of Different Copper Species on the Combustion of Dichloromethane over Cu/HZSM-5 Zeolite Nanoporous Catalysts

Effects of Different Copper Species on the Combustion of Dichloromethane over Cu/HZSM-5 Zeolite Nanoporous Catalysts

Improvement of Enzymatic Glucose Conversion from Chestnut Shells through Optimization of KOH Pretreatment

The effect of MgO and preparation techniques of the FeMnO_δ/MgO–Al₂O₃ catalyst used for the vapor phase oxidation of cyclohexane

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Catalytic oxidation of benzene over alumina-supported Cu-Mn-Ce mixed oxide catalysts

Cited by 14 publications

References 47 publications

Effects of Different Copper Species on the Combustion of Dichloromethane over Cu/HZSM-5 Zeolite Nanoporous Catalysts

Effects of Different Copper Species on the Combustion of Dichloromethane over Cu/HZSM-5 Zeolite Nanoporous Catalysts

Improvement of Enzymatic Glucose Conversion from Chestnut Shells through Optimization of KOH Pretreatment

The effect of MgO and preparation techniques of the FeMnOδ/MgO–Al2O3 catalyst used for the vapor phase oxidation of cyclohexane

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The effect of MgO and preparation techniques of the FeMnO_δ/MgO–Al₂O₃ catalyst used for the vapor phase oxidation of cyclohexane