Pitching Video Secondary School YPEC 2020

SS14 – Photocatalysts -VOC terminator

Nowadays, the emission of volatile organic compounds (VOCs) is one of the major contributors to air pollution. The main sources of VOCs are petroleum refineries, fuel combustions, chemical industries, cleaning products, printing presses, office supplies, etc. The most common VOCs are halogenated compounds, alcohols, acetone, aromatic compounds, etc. High concentrations of VOCs can cause irritations, dizziness, and headaches. Some VOCs are even carcinogenic for both humans and animals. Therefore, it is very important to eliminate VOCs to reduce its serious consequences. Photocatalytic oxidation of VOCs can handle a range of organic emissions under mild operating conditions. With UV activation, the electrons in the catalysts are excited to reduce VOCs into harmless substances, like carbon dioxide and water. The metal can be regenerated by oxygen so the photocatalysts are reusable. The effectiveness of different photocatalysts on reducing VOCs, ethanol, acetone, naphtha, and methylated spirits, are tested. This can be used with household air purifiers with coating on the filter to degrade VOCs effectively with a low running cost. The photocatalysts coated filter can operate with UV lamps installed into the air purifier. With the energy provided by the UV light, catalytic oxidation can be undergone to degrade the VOCs.

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