Feasibility Study and Selection of Suitable Process for Flare Gas Recovery in Parsian Refinery

With increasing population, reducing the amount of pollutants in the environment is especially important. Oil and gas refineries are one of industrial units which cause environmental pollution. Since all the hydrocarbon components recovered from the reservoirs are not separable, therefore inevitably a significant amount of these compounds, which are generally of high economic value, are burn in flares. In addition to the loss of many beneficial hydrocarbon compounds, flaring has many environmental damages. The main purpose of this paper is to provide the best way to separate and minimize flare gases and reduce the loss of gas hydrocarbons. For this purpose, the separation of gases sent to Parsian refinery flare was simulated using Aspen HYSYS software and operational enhancements were applied. Different types of amines for carbon dioxide separation were investigated and the best type was selected with the highest recovery rate. Moreover, sensitivity analysis were performed on important operational parameters and the results were analyzed. Finally the application of separated carbon dioxide for gas injection in gas reservoirs for pressure stabilization and the separated sweet gas for GTL process and conversion to more valuable compounds were suggested.