Soltanalizadeh Maleki,H , , Behroozsarand,A , and Hosseini-Dastgerdi,Z . "Optimization of an Integrated Natural Gas to Polypropylene Plant Using Sinus-Cosine Algorithm", Journal of Petroleum Science and Technology, 13, 2, 2023, 46-67. doi: 10.22078/jpst.2023.5021.1853