Environmental Science and Pollution Research

, Volume 26, Issue 11, pp 11314–11325 | Cite as

Photochemical removal of acetaldehyde using 172 nm vacuum ultraviolet excimer lamp in N2 or air at atmospheric pressure

  • Masaharu TsujiEmail author
  • Masato Miyano
  • Naohiro Kamo
  • Takashi Kawahara
  • Keiko Uto
  • Jun-ichiro Hayashi
  • Takeshi Tsuji
Research Article


The photochemical removal of acetaldehyde was studied in N2 or air (O2 1–20%) at atmospheric pressure using side-on and head-on types of 172 nm Xe2 excimer lamps. When CH3CHO was decomposed in N2 using the head-on lamp (HL), CH4, CO, and CO2 were observed as products in FTIR spectra. The initial removal rate of CH3CHO in N2 was ascertained as 0.37 min−1. In air (1–20% O2), HCHO, HCOOH, CO, and CO2 were observed as products in FTIR spectra. The removal rate of CH3CHO in air using the side-on lamp (SL) increased from 3.2 to 18.6 min−1 with decreasing O2 concentration from 20 to 1%. It also increased from 2.5 to 3.7 min−1 with increasing CH3CHO concentration from 150 to 1000 ppm at 20% O2. The best energy efficiency of the CH3CHO removal using the SL in a flow system was 2.8 g/kWh at 1% O2. Results show that the contribution of O(1D) and O3 is insignificant in the initial decomposition of CH3CHO. It was inferred that CH3CHO is initially decomposed by the O(3P) + CH3CHO reaction at 5–20% O2, whereas the contribution of direct vacuum ultraviolet (VUV) photolysis increases concomitantly with decreasing O2 pressure at < 5% O2. After initial decomposition of CH3CHO, it was oxidized further by reactions of O(3P), OH, and O3 with various intermediates such as HCHO, HCOOH, and CO, leading to CO2 as a final product.


VOC removal Acetaldehyde VUV photolysis Excimer lamp Catalyst free 


Funding information

This work was supported by JSPS KAKENHI Grant No. 25550056 (2013–2014).

Supplementary material

11356_2019_4475_MOESM1_ESM.docx (653 kb)
ESM 1 (DOCX 653 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute for Materials Chemistry and Engineering and Research and Education Center of Green TechnologyKyushu UniversityKasugaJapan
  2. 2.Department of Applied Science for Electronics and Materials, Graduate School of Engineering SciencesKyushu UniversityKasugaJapan
  3. 3.Interdisciplinary Factory of Science and Engineering, Department of Materials ScienceShimane UniversityMatsueJapan

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