Corrigendum to “Synergistic effect of CuO nanocrystals and Cu-oxo-Fe clusters on silica support in promotion of total catalytic oxidation of toluene as a model volatile organic air pollutant” [Appl. Catal. B Environ. 268 (2020) 118749]

2020 ◽  
Vol 276 ◽  
pp. 119168
Author(s):  
Petar Djinović ◽  
Alenka Ristić ◽  
Tadej Žumbar ◽  
Venkata D.B.C. Dasireddy ◽  
Mojca Rangus ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Catalytic Oxidation ◽  
Air Pollutant ◽  
Silica Support ◽  
Volatile Organic ◽  
Cuo Nanocrystals

Catalytic oxidation of dichloromethane over Pt-Co/HZSM-5 catalyst: Synergistic effect of single-atom Pt, Co3O4, and HZSM-5

2021 ◽  
Vol 288 ◽  
pp. 119980
Author(s):  
Yun Su ◽  
Kaixuan Fu ◽  
Yanfei Zheng ◽  
Na Ji ◽  
Chunfeng Song ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Catalytic Oxidation ◽  
Single Atom

scholarly journals Influence of Alumina Precursor Properties on Cu-Fe Alumina Supported Catalysts for Total Toluene Oxidation as a Model Volatile Organic Air Pollutant

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 252
Author(s):  
Tadej Žumbar ◽  
Alenka Ristić ◽  
Goran Dražić ◽  
Hristina Lazarova ◽  
Janez Volavšek ◽  
...  
Keyword(s):  
Surface Characterization ◽  
Iron Concentration ◽  
Catalytic Performance ◽  
Air Pollutant ◽  
Molar Ratio ◽  
Homogeneous Distribution ◽  
Total Oxidation ◽  
Alumina Support ◽  
Determining Factors ◽  
Volatile Organic

The structure–property relationship of catalytic supports for the deposition of redox-active transition metals is of great importance for improving the catalytic efficiency and reusability of the catalysts. In this work, the role of alumina support precursors of Cu-Fe/Al2O3 catalysts used for the total oxidation of toluene as a model volatile organic air pollutant is elucidated. Surface characterization of the catalysts revealed that the surface area, pore volume and acid site concentration of the alumina supports are important but not the determining factors for the catalytic activity of the studied catalysts for this type of reaction. The determining factors are the structural order of the support precursor, the homogeneous distribution of the catalytic sites and reducibility, which were elucidated by XRD, NMR, TEM and temperature programed reduction (TPR). Cu–Fe/Al2O3 prepared from bayerite and pseudoboehmite as highly ordered precursors showed better catalytic performance compared to Cu-Fe/Al2O3 derived from the amorphous alumina precursor and dawsonite. Homogeneous distribution of FexOy and CuOx with defined Cu/Fe molar ratio on the Al2O3 support is required for the efficient catalytic performance of the material. The study showed a beneficial effect of low iron concentration introduced into the alumina precursor during the alumina support synthesis procedure, which resulted in a homogeneous metal oxide distribution on the support.

Significantly improved and synergistic effect of Pt–ZnO–Bi2O3 ternary hetero-junctions toward anode-catalytic oxidation of methanol in alkali

2019 ◽  
Vol 322 ◽  
pp. 134775 ◽  
Author(s):  
Kamal Kanti Bera ◽  
Malay Chakraborty ◽  
Sreya Roy Chowdhury ◽  
Apurba Ray ◽  
Sachindranath Das ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Catalytic Oxidation ◽  
Oxidation Of Methanol

Direct Comparison of Fluidized and Packed Bed Bioreactors for Bioremediation of an Air Pollutant

2007 ◽  
Vol 5 (1) ◽  
Author(s):  
Kyla Clarke ◽  
Gordon A Hill ◽  
Todd S. Pugsley
Keyword(s):  
Packed Bed ◽  
Air Pollutant ◽  
Fluidized Bed Bioreactor ◽  
Transfer Rates ◽  
Waste Gas ◽  
Glass Spheres ◽  
Fluidized Bioreactor ◽  
Volatile Organic ◽  
Fluid Bed ◽  
Maximum Elimination Capacity

A gas-solid fluidized bed bioreactor has been successfully used for the bioremediation of ethanol (a model volatile organic compound, VOC) contaminated air. A key objective of this fluidized bioreactor study was to compare the performance of fluid bed operation to packed bed operation. A fluid bed system increased homogeneity and improved upon operating problems such as plugging and channelling normally associated with packed bed bioreactors. The bioreactor bed was comprised of a mixture of moist sawdust particles and glass spheres. Depending on the superficial velocity of the waste gas stream, the bioreactor could be operated in either packed or fluidized mode. During fluid bed operation, the sawdust and glass sphere mixture was maintained in a bubbling/slugging regime. As expected, fluid bed operation demonstrated significantly higher mass transfer rates but the maximum elimination capacity was 75 g m-3sawdust h-1 as compared to 225 g m-3sawdust h-1 for packed bed operation. In packed bed mode, higher ethanol concentrations were used in order to have comparable ethanol loadings and this may have contributed to faster growth rates and thus faster bioremediation rates.

Catalytic Oxidation of Volatile Organic Compounds over Co-Based Catalysts Supported on Charcoal from Thinned Wood

2011 ◽  
Vol 44 (10) ◽  
pp. 729-734 ◽  
Author(s):  
Shimpei Kawada ◽  
Yu Guo ◽  
Lu Jia ◽  
Jian Chen ◽  
Mariko Kanehira ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Catalytic Oxidation ◽  
Organic Compounds ◽  
Volatile Organic

scholarly journals Importance of Meteorology and Chemistry in Determining Air Pollutant Levels During COVID-19 Lockdown in Indian Cities

2021 ◽  
Author(s):  
Leigh Crilley ◽  
Yashar Iranpour ◽  
Cora J. Young
Keyword(s):  
Atmospheric Chemistry ◽  
Field Measurements ◽  
Air Pollutant ◽  
Mitigation Strategies ◽  
Ozone Production ◽  
Linear Relationships ◽  
Regional Sources ◽  
Volatile Organic ◽  
Emission Changes ◽  
Indian Cities

To accurately quantify impact of short-term interventions (such as COVID-19 lockdown) on air pollutant levels, meteorology and atmospheric chemistry need to be considered in addition to emission changes. We demonstrate that regional sources have a significant influence on PM<sub>2.5 </sub>levels in Delhi and Hyderabad due to the small reduction calculated post-lockdown after weather-normalization, indicating that future PM<sub>2.5</sub> mitigation strategies should focus on national-scale, as well as local sources. Furthermore, we demonstrate with field measurements that ozone production in Delhi is likely volatile organic compound (VOC)-limited, in agreement with previous modelling predictions, indicating that ozone mitigation should focus on dominant VOC sources. This work highlights the complexity in developing mitigation strategies for air pollution due to its non-linear relationships with emissions, chemistry and meteorology.

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