Solar Simulator Tesbed: Demonstration of a Solar Photocatalytic Oxidation System.

2012 ◽  
Author(s):  
Oscar Monje
Keyword(s):  
Photocatalytic Oxidation ◽  
Solar Simulator ◽  
Oxidation System

Enhancement of membrane filtration ability by pretreatment of secondary effluent using a new photocatalytic oxidation system

2009 ◽  
Vol 6 (1-3) ◽  
pp. 184-189
Author(s):  
Ren-Yang Horng ◽  
Chih-Pin Huang ◽  
Min-Chao Chang ◽  
Hsin Shao ◽  
Mathias Ernst ◽  
...  
Keyword(s):  
Membrane Filtration ◽  
Photocatalytic Oxidation ◽  
Secondary Effluent ◽  
Oxidation System

scholarly journals Performance of PES/LSMM-OGCN Photocatalytic Membrane for Phenol Removal: Effect of OGCN Loading

Membranes ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 42 ◽  
Author(s):  
Noor Salim ◽  
Nor Nor ◽  
Juhana Jaafar ◽  
Ahmad Ismail ◽  
Takeshi Matsuura ◽  
...  
Keyword(s):  
Phase Inversion ◽  
Photocatalytic Oxidation ◽  
Photocatalytic Performance ◽  
Phenol Degradation ◽  
Phenol Removal ◽  
Membrane Performance ◽  
Phase Inversion Technique ◽  
The Stability ◽  
Oxidation System ◽  
Catalyst Distribution

In designing a photocatalytic oxidation system, the immobilized photocatalyst technique becomes highly profitable due to its promising capability in treating organic pollutants such as phenols in wastewater. In this study, hydrophiLic surface modifying macromolecules (LSMM) modified polyethersulfone (PES) hybrid photocatalytic membranes incorporated with oxygenated graphitic carbon nitride (OGCN) was successfully developed using phase inversion technique. The effectiveness of the hybrid photocatalytic membrane was determined under different loading of OGCN photocatalyst (0, 0.5, 1.0, 1.5, 2.0, and 2.5 wt%). The best amount of OGCN in the casting solution was 1.0 wt% as the agglomeration did not occur considering the stability of the membrane performance and morphology. The highest flux of 264 L/m2·h was achieved by PES/LSMM-OGCN1.5wt% membrane. However, the highest flux performance was not an advantage in this situation as the flux reduced the rejection value due to open pores. The membrane with the highest photocatalytic performance was obtained at 1.0 wt% of OGCN loading with 35.78% phenol degradation after 6 h. Regardless of the lower rejection value, the performance shown by the PES/LSMM-OGCN1.0wt% membrane was still competent because of the small difference of less than 1% to that of the PES/LSMM-OGCN0wt% membrane. Based on the findings, it can be concluded that the optimisation of the OGCN loading in the PES hybrid photocatalytic membrane indeed plays an important role towards enhancing the catalyst distribution, phenol degradation, and acceptable rejection above all considerations.

Experimental Study on Titanium Based Photocatalyst and its Catalytic Oxidation on Flue Gas Mercury

2012 ◽  
Vol 252 ◽  
pp. 293-297
Author(s):  
Xue Shi ◽  
Xue Wei Dai ◽  
Jiang Wu ◽  
Xian Li ◽  
Yi Ran Zhang ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Removal Efficiency ◽  
Flue Gas ◽  
Photocatalytic Oxidation ◽  
Elemental Mercury ◽  
Mercury Removal ◽  
Mass Ratio ◽  
Photo Catalytic Oxidation ◽  
Iron Doped ◽  
Oxidation System

This paper mainly studied the effects of different iron-doped volume on photo-catalytic oxidation of TiO2 for mercury removal. Through the photocatalytic oxidation system, we evaluated the elemental mercury removal performance of TiO2 with iron-doped mass ratio of 0.5%, 1%, 2% and 3%. While the iron-doped mass ratio were 0.5%, 1%, 2% and 3%, the elemental mercury removal efficiency were 70.83%，52.89%，72.32% and 62.39% respectively, the removal efficiency increased firstly, then declined, and 2% iron-doped was the most appropriate

Field evaluation of a photocatalytic oxidation technology

1998 ◽  
Vol 38 (7) ◽  
pp. 117-125 ◽  
Author(s):  
Kirankumar Topudurti ◽  
Mary Wojciechowski ◽  
Sandy Anagnostopoulos ◽  
Richard Eilers
Keyword(s):  
System Performance ◽  
Photocatalytic Oxidation ◽  
Field Evaluation ◽  
Operating Conditions ◽  
Matrix System ◽  
Commercial Scale ◽  
Volatile Organic ◽  
The Matrix ◽  
Oxidation Technology ◽  
Oxidation System

A commercial-scale photocatalytic oxidation system developed by Matrix Photocatalytic Inc. (Matrix) was evaluated to generate performance and cost data for the treatment of groundwater contaminated with volatile organic compounds (VOCs). High percent removals (up to 99.9%) were observed for aromatic and unsaturated VOCs. However, saturated VOC removals were insignificant. Oxidant addition to the contaminated groundwater significantly improved the treatment system performance. The Matrix system performance was reproducible under identical operating conditions. Treatment by the Matrix system did not reduce the groundwater toxicity for water fleas and fathead minnows at the 95% confidence level. Toxicity reduction achieved through VOC removal appears to have been negated by the formation of toxic byproducts including aldehydes and haloacetic acids. Estimated treatment costs are about $7.60 per 1,000 litres of groundwater.

scholarly journals Tetracycline Degradation in the UV-heterogeneous Fenton-like System With BiFeO3 Catalyst

2021 ◽  
Author(s):  
Yongwei Jiang ◽  
Chao Xing ◽  
Yue Chen ◽  
Jing Shi ◽  
Sheng Wang
Keyword(s):  
Photocatalytic Oxidation ◽  
Advanced Oxidation Processes ◽  
Degradation Process ◽  
Heterogeneous Fenton ◽  
Oxidation Processes ◽  
Toc Removal ◽  
Secondary Pollution ◽  
Tetracycline Degradation ◽  
Positive Holes ◽  
Oxidation System

Abstract Surplus tetracycline (TC) in the water body causes damage to the ecology balance and human health. Therefore, an efficient strategy was proposed, namely, the UV-heterogeneous Fenton-like system with BiFeO3 (BFO) catalyst, to eliminate TC pollution. This work successfully integrated the photocatalytic oxidation system with the heterogeneous Fenton-like system, cooperating with the photolysis of H2O2. These coupled effects could boost the reduction of Fe (Ⅲ) to Fe (Ⅱ) and depress the recombination of photogenerated charges, further promoting the generation of reactive species, and ultimately facilitating the TC degradation and mineralization. The catalytic of the prepared BFO was stable with no secondary pollution, and BFO could be recovered by an extra magnet to reuse. Compared with other advanced oxidation processes, this system showed an outstanding performance in TC degradation and mineralization, and TC and TOC removal efficiencies could reach 100% and 74.92%, respectively. Moreover, the possible mechanisms for TC degradation involved that TC was degraded by oxidation species generated by the synergistic effect in this system, such as superoxide radicals (·O- 2), hydroxyl radicals (·OH), and positive holes (h+). Intermediate products in the TC degradation process mainly were products at m/z=459, m/z=445, and m/z=134.

A Portable Photocatalytic Oxidation System for Reuse of N95 Filtering Face-Mask Respirators

2021 ◽  
Author(s):  
Kiran ◽  
Ramavtar ◽  
Shivam Chaturvedi ◽  
Rajneesh Chaurasiya ◽  
Ankur Gupta ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Face Mask ◽  
Oxidation System

Degradation of Artificial Sweetener Saccharin Sodium by Advanced Oxidation Technology

2013 ◽  
Vol 448-453 ◽  
pp. 7-10 ◽  
Author(s):  
Sheng Wen Chen ◽  
Wen Chao Li ◽  
Zhi Guo Sun ◽  
Hong Yong Xie
Keyword(s):  
Photocatalytic Oxidation ◽  
Advanced Oxidation ◽  
Degradation Process ◽  
Fenton Oxidation ◽  
Artificial Sweetener ◽  
First Order ◽  
Saccharin Sodium ◽  
Advanced Oxidation Technology ◽  
Oxidation Technology ◽  
Oxidation System

In this paper, the advanced oxidation processes of photocatalytic oxidation and Photo-Fenton oxidation were used in degradation of emerging pollutants saccharin sodium. The concentration of saccharin sodium was determined by HPLC. The results showed both photocatalytic oxidation and Photo-Fenton oxidation had an effective degradation of saccharin sodium. The degradation process was followed the first-order reaction. The best conditions of photocatalytic oxidation system: 500W mercury lamp, 0.04 g TiO2, pH=7 and the best ratio of photo-Fenton was SAC:H2O2:Fe2+=5:60:1. The total organic carbon (TOC) of sample has significantly reduced to about 93% by the two systems.

Sun Load Analysis and Testing on Automotive Front Lighting Products

2020 ◽  
pp. 116-122
Author(s):  
Emre Öztürk ◽  
Mehmet Aktaş ◽  
Tunç Şenyüz
Keyword(s):  
Prolonged Exposure ◽  
Hot Spot ◽  
Load Test ◽  
Angle Of Incidence ◽  
The Sun ◽  
Solar Simulator ◽  
Automotive Lighting ◽  
Inclination Angles ◽  
Plastic Parts ◽  
Load Simulation

The purpose of this research is to reach good correlation between sun load simulation and solar focusing test for exterior automotive lighting products. Light coming from sun is highly collimated (parallel rays) and focusable from lenses with concave structure. Focusing incidence leads to a hot spot on lens surrounding plastic parts which may cause melting failures at high temperature zones. Sun load simulation is performing to eliminate risk of discoloration, deformation, out gassing, coating failures and fire with prolonged exposure from field. Irradiance values in W/m2 defined in simulation as heat source depending of an angle of incidence of the sun radiation. At first step, simulation is performing with 5 degree intervals to define the critical zones then intervals decreased to 2 degree to detect the critical azimuth and inclination angles. Critical azimuth and inclination angles is checking with ray trace analysis to check the bouncing of sun rays and possible solution to eliminate focuses with design solutions. After numerical analysis to release and validate the automotive lighting products regarding the sun load test, measurement with first parts is necessary. Measurement is performing for all critical angles which have been detected at simulation with thermal camera under ultra high-collimation solar simulator. Measured temperatures are settled according to environment conditions and correlation is checking with simulations.

Sign in / Sign up

Export Citation Format

Share Document