Municipal solid waste management (MSWM) constitutes one of the most crucial health and environmental problems facing authorities in the Khartoum State (Sudan). The analysis showed that Khartoum State produced around 1,040,250 tons of solid municipal waste annually 12.7% of it plastic which is 132,112 tons. Studies say that the liquid (oil) yield of thermal pyrolysis of plastic waste is between 80-90%. Modification made by Aspen Hysys program for thermofuel process to improve the efficiency of the process.