Evaluation and Control of Evaporation Losses fromGasoline Internal Floating Roof Tanks

Abstract

Gasoline is a Volatile Organic Compounds (VOCs) with different boiling point range of (30-200) ºC. The lightcompounds that have boiling point of less than 40 ºC constitute about 10V %. The objective of this study is to evaluate the amount of evaporation loss of gasoline frominternal floating roof storage tank. The case study is based on U.S Environmental Protection Agency Data (USEPA) the evaporation loss calculation is accomplished by company (A). By comparing the different rim seal system liquid it was found that liquid mounted seal with rim mounted secondary has minimum evaporation loss (4068.19 Ib/yr ) ,which equals toless than (50%) of vapor mounted seal primary only (8679 Ib/yr),so it is most suitable for internal floating roof tanks. Reduction of evaporation loss of gasoline will give attractive economic returns aswell as reducing air pollution and hazards. This reduction could be achieved byplantation of the depots and increase the shadow area around tanks, and reducethe wind speed which would be considered as metrological conditions control action. in addition to the future tank design consideration and mechanicalupgrades for the existing one.