Volatile Organic Compounds (VOCs) Emitted from Petroleum and theirInfluence on Photochemical Smog Formation in the Atmosphere

摘要

Photochemical smog, characterized by high concentrations of O, and fine particles, is of great concern in many cities around the world. Although VOCs and NO, have been confirmed as the key precursors of O,, the development of an effective strategy for reducing O, pollution in megacities is still problematic due to the non-linear dependency of O, formation on NO, and VOCs [1,2]. VOCs as a group include many hundreds of species, and each one reacts at different rate and with a different reaction mechanism. Furthermore, they are also emitted into the atmosphere at different mass emission rates, depending on the local and regional industries, land-use and biogenic sources. Hence, it is important to figure out which VOC species have the highest influence on the O, formation. Without this knowledge we will not be able to formulate proper O, reduction strategy, i.e. which target pollutants need to be controlled.