simulation and exergy and exergoeconomic analysis of associated gas to liquid recovery plant (case study: 4 and 5 phases of south pars)

In the last one hundred years, the increase in the use of fossil fuels in various industries, including refineries, petrochemicals, industrial complexes, etc., to achieve more production, has led to an increase in various pollutants in the world and environmental concerns, various economic costs, and health costs. imposed on human beings. one of the most important sources of environmental pollution is industrial fluoride gases. according to global statistics, iran is known as the third country to burn these gases. reducing the emissions of these gases is one of the great goals of the international community. it seems necessary to study various methods such as converting gas to liquid to recover flare gas. this research has simulated a gas-to-liquid conversion unit using the flare gas output data of the south pars natural gas processing plant in aspen hysys v11 software. this unit is then evaluated and optimized by the exergy analysis method. the simulation output shows that when flare gas is used to liquid the unit’s raw material, 1549 barrels of gas to liquid products per day will be obtained from this unit. investigation of this case shows that one of the appropriate solutions to recover flare gas can be to create a gas to the liquid conversion unit with energy and exergy efficiency of 65% and 69%.