TiO2 Photocatalytic Oxidation of Butyraldehyde, Ethylbenzene and PCE in the Air through Concentric Reactors
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Kuyen Li
,
Steven Y. C. Liu
Abstract
Nine glass concentric reactors (LD. from 19 to 94 mm) were constructed with a 4-watt UV lamp (1.5 cm O.D. × 11 cm length) located at the center. TiO2 was coated on the inner surface of the glass reactor to test the oxidation efficiency of butyraldehyde, ethylbenzene, and PCE, separately, in the air. The reactant conversion percentages increased as the space time increased. For the same space time, a smaller diameter reactor gave a higher conversion. The total reactant converted rate was nearly equal to its input rate when the input rate was small, and was significantly less than its input rate when the input rate was large. In general, the total reactant conversion rate increased with the reactor diameter. The percent conversions of bytyraldehyde and ethylbenzene increased as the humidity increased from zero to 4,000 ppm (20% relative humidity), and approached a constant value after that. For PCE, the conversion decreased with the relative humidity. The percent conversions of all the three reactants decreased as their inlet concentration increased, indicating a competitive adsorption on the catalyst surface. For the oxygen concentration effect, the percent conversion increased and approached a constant as the oxygen concentration increased.
© 2016 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Streamer Corona Discharge Induced by Laser Pulses During LIF Measurements in a DC Non-thermal Plasma Reactor for NO Oxidation
- Destruction of Volatile Organic Compounds in Air by a Superimposed Barrier Discharge Plasma Reactor and Activated Carbon Filter Hybrid System
- The Photodecomposition of Acetaldehyde in Gas Phase Using Immobilized TiO2 on Porous α-Al2O3 Tube
- Hydrogen Peroxide/Iron Oxide -Induced Catalytic Oxidation of Organic Compounds
- Vacuum-UV Oxidation (H2O-VUV) with a Xenon Excimer Flow-Trough Lamp at 172 nm: Use of Methanol as Actinometer for VUV Intensity Measurement and as Reference Compound for OH-Radical Competition Kinetics in Aqueous Systems
- Homogeneous Photoreactions for AOTs: Reactor Analysis and Design
- A Laboratory Reactor for Photocatalytic Studies in Slurry Operation
- Optical Characteristics of Capillary U-tube Ar-Hg High Frequency Glow Discharge Plasmas and its Application for Ammonia Compound Contaminated Water Treatments
- Gas-Phase Photocatalytic Degradation of Trichloroethylene -Relation with Photochemical Reactions
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- Characteristics of Ring-to-Cylinder Type Electrode System on Pulsed Discharge in Water
- Nitrogen Oxides Removal by Using Plate Type Reactor Combined with Catalysts
- A Comparison of the Activity of Titanium Dioxide Photocatalysts for the Oxidation of Ethanol in Air
- TiO2 Photocatalytic Oxidation of Butyraldehyde, Ethylbenzene and PCE in the Air through Concentric Reactors
