Study on the Characteristics of Unorganized Emission of Volatile Organic Compounds in Chemical Industry--Taking Tianjin Chemical Enterprises as an Example

Abstract

In order to study on the unorganized emissions characteristics of volatile organic compounds (VOCs) of Tianjin chemical industry, three plants located in a chemical park in Tianjin were chosen. Air samples on the plant boundary and within the enterprise were collected through air bag, and the VOCs emission levels and component characteristics were measured using proton transfer reaction time of flight mass spectrometer (PTR-TOF-MS). The analysis results showed that, (1) the emission level of VOCs of three plants were different. The level of VOCs in tank area was directly related to the tank type, and the level in storage tank area was related to whether it was sealed, (2) the components of VOCs emitted from unorganized sources mainly were saturated alkanes represented by C₂, C₂, C₈, C₉ and C₁₁ and oxygenated volatile organic compounds (OVOCs) represented by CH₄O, (3) it was found that alkane substance was a large class of VOCs component in chemical industry plant, so alkanes should be controlled in priority.