Introducing an application method for industries air pollutants emission control planning by preparing environmental flow diagram maps

In industrial units, EFD maps are used as suitable methods for optimal management and controlling the release of pollutants into the environment. Hence, the main objective of the present research was to obtain the Environmental Flow Diagram-Air Pollutants (EFD-AP) map of the Purified Terephthalic Acid Production Units (PTA) of petrochemical industries. To this end, the flow of materials, feed, and productions of a PTA production unit in the southwest of Iran was analyzed. The pollutants of all 7 process sources and 2 combustion sources were sampled and measured using standard procedures. Finally, according to the results some calculations were done to determine the APs emission factors of the sources, and the EFD-AP maps of the studied unit were prepared. Results showed that the total emission factors of the Acetic acid, Methyl acetate, PTA powder, oil mist, CO, NO, NOx, CxHy, Co, Mg, Cu, Ni, Cd, Ti, Mo, Cr, and Pb were 219.518, 1.912, 44.58, 0.888, 64201.211, 1982.094, 2091.858, 23082, 76.868, 0.0193, 15.102, 36.829, 2.914, 37.623, 15.367, 200.572, and 2.888 mg per tonne of PTA, respectively. Also, results revealed that process sources emit different toxic and criteria pollutants into ambient air, while combustion emission sources (S8: hot oil furnace, S9; incinerator) have the main role in releasing criteria air pollutants, toxic trace elements and GHGs. It should be noted that emission factor of GHGs (CO2) for selected PTA unit was equal to 54661355 mg per ton of PTA production. Therefore, EFD-AP maps used for prioritization, controlling and management of APs emissions. Moreover, these maps have main role for preparing industrial atmospheric emission control action plan.