Evaluation of the gasoline evaporative losses rate and techno-economical and environmental Comparison of the environmental of the VRU for recovery of volatile vapors emission from chosen gas stations in Tehran

Necessity of Gasoline vapors reduction is clear for every one concerning adverse effects of Gasoline vapors inhalation on human condition and environmental threats from diffusion of them in Atmosphere. Furthermore, reclamation of gasoline vapor will be valuable economically concerning high costs of gasoline production and importation and anomalous consumption of this strategic product in country .Gas stations are one of main diffusion sources of these compounds which are more important because of their establishment in residential areas and civic populous zones. In this research considering important role of gas stations in pollutants diffusion , BTX rate of ventilation pipes output of ground tanks which are more dominant with diffusion part , was measured in Tehran gas stations of numbers 16,26,12,22,28,29 in two different seasons (warm season &cold season) then control ways were introduced to stoppage of evaporation and pollutants diffusion and they were performed in gas station No.29 as a pilot project. Primary studies showed that in warm season average rate of BTX evaporation from tanks was about 415-580 ppm which was higher than standard level and diffused high concentration of pollutants to the environment .Also in cold season average rate of BTX evaporation from tanks was about 222-320 ppm. Gasoline evaporation and pollutants diffusion from ventilation pipes output of ground tanks were reduced about% 95-99after performance of control stage I. After studying and comparing different types of gasoline vapor reclamation systems, Refrigeration reclamation system was introduced as a favored system in Iran to reproduction of liquid gasoline. With implementing this project and vapors reclamation, in addition to stoppage of vapors diffusion , you will save 180.000.000 Tomans daily economically.

کلیدواژه ها:

Gasoline's vapor ، Gasoline stations ، Emission ، Recovery