Abstract
The photochemical removal of NO2 in air (1–20% O2) was studied using a side-on type 172-nm Xe2 excimer lamp. The removal rate of NO2 using the side-on lamp (SL), 37.5 min−1, was faster than that using a head-on lamp (HL), 5.4 min−1, with the same input power of 20 W by a factor of 6.9. The energy efficiency for removal of NO2 using the SL was 3.2 g/kWh, which was 12 times higher than that using the HL. Significant enhancement of the removal rate and the energy efficiency using the SL was attributed to a significant increase in the irradiation volume because of a wider irradiation window. Under the SL irradiation, HNO3 was a major final product that differed from N2O5 obtained under the HL irradiation. To obtain the information related to the conversion mechanism of NO2 to HNO3 under 172-nm photolysis in air, computer simulation of the reaction processes was conducted. Results show that the OH + NO2 reaction is a major pathway for the formation of HNO3 in the SL, where OH radicals are formed by 172-nm photolysis of H2O.
| Original language | English |
|---|---|
| Pages (from-to) | 5685-5694 |
| Number of pages | 10 |
| Journal | International Journal of Environmental Science and Technology |
| Volume | 16 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 1 2019 |
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All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Environmental Chemistry
- Agricultural and Biological Sciences(all)
Cite this
Photochemical removal of NO2 in air at atmospheric pressure using side-on type 172-nm Xe2 excimer lamp. / Tsuji, M.; Kawahara, T.; Uto, K.; Jun-Ichiro, Hayashi; Tsuji, T.
In: International Journal of Environmental Science and Technology, Vol. 16, No. 10, 01.10.2019, p. 5685-5694.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Photochemical removal of NO2 in air at atmospheric pressure using side-on type 172-nm Xe2 excimer lamp
AU - Tsuji, M.
AU - Kawahara, T.
AU - Uto, K.
AU - Jun-Ichiro, Hayashi
AU - Tsuji, T.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - The photochemical removal of NO2 in air (1–20% O2) was studied using a side-on type 172-nm Xe2 excimer lamp. The removal rate of NO2 using the side-on lamp (SL), 37.5 min−1, was faster than that using a head-on lamp (HL), 5.4 min−1, with the same input power of 20 W by a factor of 6.9. The energy efficiency for removal of NO2 using the SL was 3.2 g/kWh, which was 12 times higher than that using the HL. Significant enhancement of the removal rate and the energy efficiency using the SL was attributed to a significant increase in the irradiation volume because of a wider irradiation window. Under the SL irradiation, HNO3 was a major final product that differed from N2O5 obtained under the HL irradiation. To obtain the information related to the conversion mechanism of NO2 to HNO3 under 172-nm photolysis in air, computer simulation of the reaction processes was conducted. Results show that the OH + NO2 reaction is a major pathway for the formation of HNO3 in the SL, where OH radicals are formed by 172-nm photolysis of H2O.
AB - The photochemical removal of NO2 in air (1–20% O2) was studied using a side-on type 172-nm Xe2 excimer lamp. The removal rate of NO2 using the side-on lamp (SL), 37.5 min−1, was faster than that using a head-on lamp (HL), 5.4 min−1, with the same input power of 20 W by a factor of 6.9. The energy efficiency for removal of NO2 using the SL was 3.2 g/kWh, which was 12 times higher than that using the HL. Significant enhancement of the removal rate and the energy efficiency using the SL was attributed to a significant increase in the irradiation volume because of a wider irradiation window. Under the SL irradiation, HNO3 was a major final product that differed from N2O5 obtained under the HL irradiation. To obtain the information related to the conversion mechanism of NO2 to HNO3 under 172-nm photolysis in air, computer simulation of the reaction processes was conducted. Results show that the OH + NO2 reaction is a major pathway for the formation of HNO3 in the SL, where OH radicals are formed by 172-nm photolysis of H2O.
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U2 - 10.1007/s13762-018-2131-y
DO - 10.1007/s13762-018-2131-y
M3 - Article
AN - SCOPUS:85058012624
VL - 16
SP - 5685
EP - 5694
JO - International Journal of Environmental Science and Technology
JF - International Journal of Environmental Science and Technology
SN - 1735-1472
IS - 10
ER -