A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Effect of Ozone on the Removal Effectiveness of Photocatalysis on Indoor Gaseous Biogenic Volatile Organic Compounds
In this study, the degradation of d-limonene by photocatalytic oxidation (PCO) (titanium dioxide [TiO2]/ultraviolet [UV]) and by the combination of PCO and ozone (O3) (TiO2/UV/O3) was investigated to evaluate the enhancement effect of O3. The degradation of d-limonene by UV/O3 was also investigated for comparison. The experiments were conducted with a quartz photoreactor under various gas flow rates (600–1600 mL min-1), d-limonene concentrations (0.5–9 parts per million [ppm]), and relative humidity (RH) (20–80%). The d-limonene removal efficiency of TiO2/UV/O3, TiO2/UV, and UV/O3 ranged from 62 to 99%, from 49 to 99%, and from 46 to 75%, respectively. The addition of 120-ppb O3 can enhance the d-limonene removal efficiency of PCO up to 12%. The apparent kinetic parameters (apparent rate constants, k apparent and Langmuir adsorption constants, K apparent) of TiO2/UV and TiO2/UV/O3 reactions obtained from fitting Langmuir–Hinshelwood models are TiO2/UV: k apparent = 1.45 × 10−3 ppm-m sec−1, K apparent = 0.34 ppm−1; TiO2/UV/O3: k apparent = 1.83 × 10−3 ppm-m sec−1, and K apparent = 0.35 ppm−1. When RH was higher than 40%, the residual intermediates yield rates of d-limonene of TiO2/UV/O3, TiO2/UV, and UV/O3 reactions ranged from 0.39 to 0.51 μmol carbon m−2 sec−1, 0.56 to 1.96 μmol carbon m−2 sec−1, and 157 to 177 μmol carbon m−3 sec−1, respectively. In the photocatalytic reaction experiments, the addition of 120-parts per billion (ppb) O3 can reduce the residual intermediates yield rates of d-limonene by up to 1.46 μmol carbon m−2 sec−1. These experimental results showed that O3 can enhance the effectiveness of photo-catalysis on the removal of d-limonene.
The Effect of Ozone on the Removal Effectiveness of Photocatalysis on Indoor Gaseous Biogenic Volatile Organic Compounds
In this study, the degradation of d-limonene by photocatalytic oxidation (PCO) (titanium dioxide [TiO2]/ultraviolet [UV]) and by the combination of PCO and ozone (O3) (TiO2/UV/O3) was investigated to evaluate the enhancement effect of O3. The degradation of d-limonene by UV/O3 was also investigated for comparison. The experiments were conducted with a quartz photoreactor under various gas flow rates (600–1600 mL min-1), d-limonene concentrations (0.5–9 parts per million [ppm]), and relative humidity (RH) (20–80%). The d-limonene removal efficiency of TiO2/UV/O3, TiO2/UV, and UV/O3 ranged from 62 to 99%, from 49 to 99%, and from 46 to 75%, respectively. The addition of 120-ppb O3 can enhance the d-limonene removal efficiency of PCO up to 12%. The apparent kinetic parameters (apparent rate constants, k apparent and Langmuir adsorption constants, K apparent) of TiO2/UV and TiO2/UV/O3 reactions obtained from fitting Langmuir–Hinshelwood models are TiO2/UV: k apparent = 1.45 × 10−3 ppm-m sec−1, K apparent = 0.34 ppm−1; TiO2/UV/O3: k apparent = 1.83 × 10−3 ppm-m sec−1, and K apparent = 0.35 ppm−1. When RH was higher than 40%, the residual intermediates yield rates of d-limonene of TiO2/UV/O3, TiO2/UV, and UV/O3 reactions ranged from 0.39 to 0.51 μmol carbon m−2 sec−1, 0.56 to 1.96 μmol carbon m−2 sec−1, and 157 to 177 μmol carbon m−3 sec−1, respectively. In the photocatalytic reaction experiments, the addition of 120-parts per billion (ppb) O3 can reduce the residual intermediates yield rates of d-limonene by up to 1.46 μmol carbon m−2 sec−1. These experimental results showed that O3 can enhance the effectiveness of photo-catalysis on the removal of d-limonene.
The Effect of Ozone on the Removal Effectiveness of Photocatalysis on Indoor Gaseous Biogenic Volatile Organic Compounds
Yu, Kuo-Pin (author) / Lee, Grace Whei-May (author) / Huang, Guo-Hao (author)
Journal of the Air & Waste Management Association ; 60 ; 820-829
2010-07-01
10 pages
Article (Journal)
Electronic Resource
Unknown
Heterogeneous Photocatalysis for Control of Volatile Organic Compounds in Indoor Air
| Taylor & Francis Verlag | 1996
| Taylor & Francis Verlag | 1998
Urban–Rural Comparisons of Biogenic Volatile Organic Compounds and Ground-Level Ozone in Beijing
| DOAJ | 2024
Effectiveness of indoor plants for passive removal of indoor ozone
| Online Contents | 2017