Evaluation of UV-Photocatalytic Oxidation of Light Alcohols at Sub-PPM Concentrations

This article reports the outcome of an experimental study on the evaluation of photocatalytic oxidation reactions of light alcoholic volatile organic compounds with nano TiO₂ catalysts at different indoor air conditions. The removal efficiencies of tested individual volatile organic compounds and their by-products were compared at three different parts per billion-level challenge concentrations. Acetaldehyde and formaldehyde were identified as primary by-products, and no significant catalyst deactivation was found during the experiment. The reaction pathways and the selectivity of the reactions were investigated at different relative humidity levels.