Separation of sulfur-containing compounds from crude oil is recognized as a fundamental need to prevent the ecological problems caused by these compounds and the waste of this cheap resource to produce more valuable products such as sodium sulfide and sodium hydrosulfide. In this research, according to the various processes of sodium sulfide production, simulation of a sodium sulfide crystals production plant from hydrogen sulfide gas and sodium hydroxide solution was performed. Based on conducted economical studies on global and regional markets of this product, the annual production capacity of 40 thousand tons was selected for simulation of this processing plant. Static simulation of main equipment of the processing plant, consisting of two stirred tank reactors and an absorption tower, was carried out by Aspen Plus simulator. Based on the simulation results, for simultaneous production of sodium sulfide and sodium hydrosulfide with rates of 5833 kg/h and 119 kg/h, respectively, input flows of 2317 kg/h sour gas with a purity of 95 wt% and 16664 kg/h sodium hydroxide with purity of 33 wt% are used, which is the removal efficiency hydrogen sulfide gas is 95.99% of the process flow. Based on simulation and economical eva‎luation results, the internal return rate is estimated at 41.49 and based on this basis, the normal investment return period of the project, including 2 years of the construction period, is predicted to be 4.2 years. Key Words Static simulation, Economic eva‎luation, Absorption of hydrogen sulfide by soda solution, Sodium sulfide, Sodium hydrosulfide.

ارجمند مهرباني زين آباد

محسن محمدي

احمد محب , حميدرضا شاه وردي