Abstract: Petrochemical plants are typical emissions sources of volatile organic compounds (VOCs), with the characteristics of multiple sources, wide distribution, large fluctuations, and a high proportion of fugitive emissions, making the monitoring and control difficult. A monitoring vehicle equipped with rapid response spectrometer was used to monitor the concentration and distribution of representative VOCs components, such as alkanes, olefins, and aromatics in the petrochemical plant. It was found that alkane pollution existed in all areas of the plant, due to continuous alkane emissions from 6 units and 10 storage tank areas. The distribution of olefin and aromatics pollution existed in a few areas. The mobile monitoring technology can be used to significantly improve the timeliness and spatial coverage, clarify the VOCs emission characteristics and pollution levels of different production facilities and storage tank areas in petrochemical plants, and provide reliable data support for subsequent VOCs control and the construction and optimization of online monitoring systems.

Key words: mobile monitoring, volatile organic compounds, petrochemical plant, spectroscopic technology