Alkaline Air Oxidation of 5-hydroxy-2-methyl-1,4,4a,9a-tetrahydroanthracene-9,10-dione

10.1039/sp801 ◽  
2015 ◽  
Author(s):  
Jevica Salim ◽  
Steven M. Kennedy
Keyword(s):  
Air Oxidation

Microstructures and Bending Property of Mesophase Based C/C Composites with Air Oxidation Process

2011 ◽  
Vol 26 (2) ◽  
pp. 197-202
Author(s):  
Hai-Liang LI ◽  
He-Jun LI ◽  
Jin-Hua LU ◽  
Ke-Zhi LI ◽  
Dong-Jia YAO ◽  
...  
Keyword(s):  
Oxidation Process ◽  
Air Oxidation ◽  
Bending Property

Catalytic wet air oxidation of dyeing and printing wastewater

1997 ◽  
Vol 35 (4) ◽  
pp. 311-319 ◽  
Author(s):  
L. Lei ◽  
X. Hu ◽  
H. P. Chu ◽  
G. Chen ◽  
P. L. Yue
Keyword(s):  
High Pressure ◽  
Reaction Time ◽  
Textile Industry ◽  
Porous Alumina ◽  
Supported Catalyst ◽  
Metal Salts ◽  
Treated Wastewater ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation

The treatment of dyeing and printing wastewater from the textile industry by oxidation was studied. The reaction was carried out in a two-litre high pressure reactor. In order to promote the oxidation of organic pollutants present in the wastewater, experiments were conducted using various catalysts including metal salts, metal oxides, and porous alumina supported metals. All catalysts tested were able to enhance the conversion of organic compounds in wastewater, shorten the reaction time, and lower the reaction temperature. The alumina supported catalyst has an advantage over other catalysts in that it can be easily separated from the treated wastewater by filtration and recycled. The conditions in preparing the catalyst supported by porous alumina were experimentally optimised.

Synthesis, characterization and activity of W–La/CexZr1−xO2 catalysts in the catalytic wet air oxidation of phenol

2021 ◽  
Author(s):  
Mohamed Achraf Bouabdellah ◽  
Itidel Belkadhi ◽  
Lassaad Ben Hammouda ◽  
Gwendoline Lafaye ◽  
Francisco Medina Cabello ◽  
...  
Keyword(s):  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Oxidation Of Phenol

scholarly journals Life cycle thinking case study for catalytic wet air oxidation of lignin in bamboo biomass for vanillin production

2021 ◽  
Vol 23 (4) ◽  
pp. 1847-1860
Author(s):  
Christopher S. McCallum ◽  
Wanling Wang ◽  
W. John Doran ◽  
W. Graham Forsythe ◽  
Mark D. Garrett ◽  
...  
Keyword(s):  
Life Cycle ◽  
Crude Oil ◽  
Kraft Lignin ◽  
Life Cycle Thinking ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation

A life cycle thinking analysis (LCT) conducted on the production of vanillin via bamboo wet air oxidation compared to vanillin production from crude oil or kraft lignin.

scholarly journals A Study of Prediction Model Improvement for Air-Oxidation Breakaway in a Postulated Spent Nuclear Fuel Pool Complete Loss of Coolant Accident

2021 ◽  
Vol 13 (3) ◽  
pp. 1442
Author(s):  
Sanggil Park ◽  
Jaeyoung Lee ◽  
Min Bum Park
Keyword(s):  
Kinetic Model ◽  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Complete Loss ◽  
Air Oxidation ◽  
Loss Of Coolant Accident ◽  
Spent Nuclear Fuel Pool ◽  
Loss Of Coolant ◽  
Model Derivation ◽  
Model Improvement

The temperature of zirconium alloy cladding on the postulated spent nuclear fuel pool complete loss of coolant accident is abruptly increased at a certain time and the cladding is almost fully oxidized to weak ZrO2 in the air. This abrupt temperature escalation phenomenon induced by the air-oxidation breakaway is called a zirconium fire. Although an air-oxidation breakaway kinetic model correlated between time and temperature has been implemented in the MELCOR code, it is likely to bring about unexpected large errors because of many limitations of model derivation. This study suggests an improved time–temperature correlated kinetic model using the Johnson–Mehl equation. It is based on that the air-oxidation breakaway is initiated by the phase transformation from the tetragonal to monoclinic ZrO2 at the oxide–metal interface in the cladding. This new model equation is also evaluated with the Zry-4 air-oxidation literature data. This equation resulted in the almost similar air-oxidation breakaway timing to the actual experimental data at 800 °C. However, at 1000 °C, it showed an error of about 8 min. This could be inferred from the influence of the ZrN phase change due to the nitrogen existing in air.

Effect of added gadolinium oxide on the thermal air oxidation of uranium dioxide

2021 ◽  
Vol 552 ◽  
pp. 153008
Author(s):  
Randall D. Scheele ◽  
Brady D. Hanson ◽  
Andrew M. Casella
Keyword(s):  
Uranium Dioxide ◽  
Gadolinium Oxide ◽  
Air Oxidation

Comprehensive Evaluation of Non-Catalytic Wet Air Oxidation as a Pretreatment to Remove Pharmaceuticals from Hospital Effluents

2021 ◽  
Author(s):  
Valérie Boucher ◽  
Margot Beaudon ◽  
Pedro Ramirez ◽  
Pascal Lemoine ◽  
Kalyssa Volk ◽  
...  
Keyword(s):  
Surface Waters ◽  
Comprehensive Evaluation ◽  
Chemical Processes ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Highly Efficient ◽  
Hospital Effluents ◽  
Promising Solution

Removal of pharmaceuticals from wastewater using chemical processes is a promising solution to mitigate pollution in drinking and surface waters. Non-catalytic wet air oxidation (WAO) is a highly efficient advanced...

scholarly journals Effect of Air Oxidation on Texture, Surface Properties and Dye Adsorption of Wood-Derived Porous Carbon Materials

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1675 ◽  
Author(s):  
Suhong Ren ◽  
Liping Deng ◽  
Bo Zhang ◽  
Yafang Lei ◽  
Haiqing Ren ◽  
...  
Keyword(s):  
Surface Area ◽  
Functional Groups ◽  
Porous Carbon ◽  
Carbon Materials ◽  
Dye Adsorption ◽  
Carbon Surface ◽  
Air Oxidation ◽  
Activation Temperature ◽  
Porous Carbon Materials ◽  
Hierarchical Porous

Hierarchical porous carbon materials made from cork were fabricated using a facile and green method combined with air activation, without any templates and chemical agents. The influence of air activation on the texture and other surface characteristics of the carbon materials were evaluated by various characterization techniques. Results indicate that air oxidation can effectively improve the surface area and the hierarchical porous structure of carbon materials, as well as increase the number of oxygen-containing functional groups on the carbon surface. The specific surface area and the pore volume of the carbon material activated by air at 450 °C (C800-M450) can reach 580 m2/g and 0.379 cm3/g, respectively. These values are considerably higher than those for the non-activated material (C800, 376 m2/g, 0.201 cm3/g). The contents of the functional groups (C–O, C=O and O–H) increased with rising activation temperature. After air activation, the adsorption capacity of the carbon materials for methylene blue (MB) and methyl orange (MO) was increased from 7.7 and 6.4 mg/g for C800 to 312.5 and 97.1 mg/g for C800-M450, respectively. The excellent dye removal of the materials suggests that the porous carbon obtained from biomass can be potentially used for wastewater treatment.

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