DESIGN AND SIMULATION OF SULFURIC ACID PLANT FROM ACID GAS IN OIL REFINERIES

Abstract

Industries must develop methods for raw material processing with greater vigilance than before due to stricter environmental laws. Sulfur emissions are the most pressing environmental risk associated with the processing of fossil fuels. The raw natural gas extracted from wells is a blend of several types of hydrocarbons in different proportions, along with notable levels of impurities such as carbon dioxide, hydrogen sulfide, mercaptans, and organic compounds that include nitrogen. As a result, downstream applications are not appropriate for natural gas in its basic form. A method known as "sweetening of Acid gas" is used to remove sulfur pollutants from natural gas, which is referred to as "Acid gas.". Two streams are produced because of the amine absorption process utilized in the sweetening process: sweetened natural gas that is ready for use as fuel or as a feedstock for the chemical industry, and a mixture of gaseous pollutants known as acid gas when it contains a high concentration of sulfur and carbon dioxide. The goal of this project is to recover sulfur from acid gases that are released from a natural gas processing plant's absorption unit. Modified Claus Process along with Super Claus Reactor, a refined and enhanced version of Claus Process, is the method used for sulfur recovery. The last catalytic packed bed reactor of the three is equipped with a specialized selective oxidation catalyst thanks to this technique. The goal is to recover as much elemental sulfur as possible from the acid gas stream to almost eliminate sulfur emissions. The recovered sulfur will then serve as a feedstock for Sulfuric Acid Production for that we use the Double Contact Double Absorption Process to get economic benefits and meet the demand of the market.