- Construction process from 2009 to 2011 - Change of crude oil from Central Asian and Ahvaz Asmari to Marun and North Dezful and Ahvaz Asmari crude oil - Reduction in sulfur output of diesel and kerosene products in accordance with European standards (Euro 5) - Increase in sulfur production as a by-product in the sulfur recovery unit with a recovery capacity of 110 tons per day