Study on the Speciation of VOCs at Oil Refining Plant Fenceline through Active Sampling

The petroleum refining industry emits various volatile organic compounds (VOCs), including high-volatility benzene, which can have a significant impact on the local community. To address this issue, US Environmental Protection Agency (EPA) has implemented fenceline monitoring system to ensure that benzene concentrations at do not exceed 9 μg/m3. However, there are types of VOCs, and some with high potential atmospheric oxidation (POCP) values, may cause secondary air pollution. This study found both sites exceeded action level (9 μg/m3), locations where was were close crude distillation unit (CDU) (max concentration 34.07 μg/m3). Additionally, amount xylene POCP also released. emission rate site A 27.71%, B 46.75%. Therefore, it is necessary reduce high-POCP xylene. In industries use solvents, important prioritize VOCs for continuous measurement analysis establish reduction strategies.