Optimization of Product Distribution in the Heavy Oil Vacuum Residue High Value-added Process by Using AdditivesShiguang Fan, Guanjun Xu, He Liu, Jian Wang, Zongxian Wang, Shengnan Sun and Bernard Wiafe BineyE3S Web Conf., 194 (2020) 01031DOI: https://doi.org/10.1051/e3sconf/202019401031