Simulation and Sensitivity Analysis of the Mazut Hydro Cracking Unit of Iranian Power Plants to Remove Sulfur Compounds and Naphtha Production
Volume Title: 1
Authors
1Research Niroo Institute
2School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
3Chemistry and process engineering department, Niroo Research institute
Abstract
Gas-fired power plants use liquid fuels such as Mazut to prevent disruption to electricity production and offset gas shortages in some seasons. However, the presence of sulfur and nitrogen compounds in liquid fuels causes severe corrosion of equipment in addition to significant damage to the environment, major international penalties and rising costs. Therefore, it is necessary to perform hydrogen desulfurization and hydrogen denitrogenization before using Mazut in the power plants. The purpose of this study was to simulate and analyze the sensitivity of the Mazut Hydrocracking Unit with a volumetric flow of 250 m3/h with 3.5 wt% sulfur in Aspen HYSYS Petroleum Refining software to remove contaminants as well as to produce more valuable fuels such as naphta. The objective is to achieve the maximum naphtha production and the separation of sulfur compounds. In this simulation, the effect of operating parameters such as pressure, hydrogen-to-fuel ratio, temperature of the high-pressure separator, inlet temperature of the beds and finally the catalyst consumption were investigated. The results showed that by increasing the pressure, increasing the hydrogen-to-Mazut ratio, increasing the catalyst consumption, increasing the inlet temperature of the beds and decreasing the temperature of the high-pressure separator, the rate of naphtha and sulfur production increase.
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