Enhanced electro-catalytic degradation and kinetics of phenol in wastewater by high-gravity field with Ti/RuO2-IrO2-SnO2 anodes

2019 ◽  
Vol 168 ◽  
pp. 100-107
Author(s):  
Jing Gao ◽  
Huanhuan Zhao ◽  
Weizhou Jiao ◽  
Youzhi Liu ◽  
Dongming Zhang ◽  
...  
Keyword(s):  
Gravity Field ◽  
Catalytic Degradation ◽  
High Gravity ◽  
High Gravity Field ◽  
Kinetics Of

scholarly journals A novel electro-catalytic degradation method of phenol wastewater with Ti/IrO2-Ta2O5 anodes in high-gravity fields

2017 ◽  
Vol 76 (3) ◽  
pp. 662-670 ◽  
Author(s):  
Jing Gao ◽  
Junjuan Yan ◽  
Youzhi Liu ◽  
Jiacheng Zhang ◽  
Zhiyuan Guo
Keyword(s):  
Energy Consumption ◽  
Gravity Field ◽  
Normal Gravity ◽  
Catalytic Degradation ◽  
Degradation Efficiency ◽  
High Gravity ◽  
Electrolysis Time ◽  
Removal Efficiencies ◽  
High Gravity Field ◽  
Phenol Wastewater

In the electro-catalytic degradation process of phenol wastewater, bubbles and mass transfer limitation will result in the decrease in wastewater degradation efficiency, a long electrolysis time and a high energy consumption. Self-made Ti/IrO2-Ta2O5 anodes and a high-gravity electro-catalytic reactor were used to improve them. The Ti/IrO2-Ta2O5 anode was prepared with a thermal decomposition method and characterized by scanning electron microscopy (SEM). Under optimum conditions, the removal efficiencies of phenol, total organic carbon (TOC) and chemical oxygen demand (COD) respectively reached 94.77%, 50.96% and 41.2% after 2 h electrolysis in the high-gravity field, which were respectively 10.93%, 16.72% and 24.84% higher than those in the normal gravity field. For about the same removal efficiencies, the electrolysis time and energy consumed in the high-gravity field were 33.3% and 15.4% lower than those consumed in the normal gravity field, respectively. The degradation pathway of phenol detected by high performance liquid chromatography (HPLC) was unchanged in the high-gravity field, but the degradation rate of phenol increased. The Ti/IrO2-Ta2O5 anode provided good stability because the removal efficiencies of phenol and TOC decreased slightly and the surface morphology of the coating was almost unchanged when it had been used in electrolysis for 11 months, about 1,200 h, in the high-gravity field. Results indicated that the phenol wastewater degradation efficiency was improved, the time was shortened, and the energy consumption was reduced in the high-gravity field.

scholarly journals Nitrogen-Doped Graphene Foam as a Metal-Free Catalyst for Reduction Reactions under a High Gravity Field

Engineering ◽  
2020 ◽  
Vol 6 (6) ◽  
pp. 680-687 ◽  
Author(s):  
Zhiyong Wang ◽  
Zhijian Zhao ◽  
Jesse Baucom ◽  
Dan Wang ◽  
Liming Dai ◽  
...  
Keyword(s):  
Gravity Field ◽  
High Gravity ◽  
Graphene Foam ◽  
Reduction Reactions ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
High Gravity Field

Micromixing Efficiency Intensification of a Millimeter Channel Reactor in the High Gravity Field

2022 ◽  
pp. 117407
Author(s):  
Shun Bai ◽  
Wen-Si Li ◽  
Wei Liu ◽  
Yong Luo ◽  
Guang-Wen Chu ◽  
...  
Keyword(s):  
Gravity Field ◽  
High Gravity ◽  
Channel Reactor ◽  
High Gravity Field

Numerical Analysis on Droplet Deformation and Breakup in High Gravity Field

2014 ◽  
Vol 624 ◽  
pp. 276-279 ◽  
Author(s):  
Jian Dong Li ◽  
Dian Jun Zuo ◽  
Yu Ting Zhang
Keyword(s):  
Gravity Field ◽  
Droplet Diameter ◽  
Droplet Breakup ◽  
Test Method ◽  
High Gravity ◽  
Droplet Deformation ◽  
Geotechnical Centrifuge ◽  
G Value ◽  
High Gravity Field ◽  
Breakup Time

Research slope stability under rainfall condition in geotechnical centrifuge is an ideal test method, however, the influence of high centrifugal force field produced by running geotechnical centrifuge cannot be neglected. Droplet deformation and breakup under different gravity and of different diameters were studied with VOF method, the results shows that the process of droplet deformation and breakup is similar under condition of different g-value and diameters, droplet breakup in a very short time in high gravity field, and with the increase of g-value, the breakup time of droplet became shorter, with the increase of droplet diameter, the breakup time of droplet became longer under same gravity acceleration. Studies in this paper have important significance in developing geotechnical centrifuge artificial rainfall equipment.

Ceramic-Metal Functionally Gradient Multilayer Composite Fabricated by Combustion Synthesis in High-Gravity Field

2016 ◽  
Vol 680 ◽  
pp. 174-178
Author(s):  
De Jun Yin ◽  
Zhong Min Zhao ◽  
Long Zhang
Keyword(s):  
Gravity Field ◽  
Combustion Synthesis ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
High Gravity ◽  
Multilayer Composite ◽  
Functionally Gradient ◽  
42Crmo Steel ◽  
Multilayer Composites ◽  
High Gravity Field

By taking combustion synthesis in high-gravity field to achieve fusion bonding of TiB2-based ceramic, Ti-6Al-4V alloy, the mid-ceramic and 42CrMo steel simultaneously, the ceramic-metal FG multilayer composites with the continuously-graded interfacial microstructures were successfully fabricated. XRD, FESEM and EDS results showed the formation of continuously-graded interfacial microstructures among TiB2-based ceramic, Ti-6Al-4V alloy, the mid-ceramic and 42CrMo steel resulted from thermal explosion reaction caused by high gravity field, liquid fusion of the ceramic, Ti-6Al-4V alloy, the mid-ceramic and 42CrMo steel, so hard-by-soft distribution in the hardness of FG multilayer composite was presented, and the interfacial shear strength of TiB2-based ceramic and Ti-6Al-4V alloy, and the mid-ceramic and 42CrMo steel measured 198 ± 25 MPa and 130 ± 15 MPa, respectively.

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