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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...
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