Catalytic Cracking of Heavy Oil from Waste Plastic in Tapered Circulating Fluidized Bed Riser ReactorParinya Khongprom, Thanapat Whansungnoen, Permsak Pienduangsri, Waritnan Wanchan and Sunun LimtrakulE3S Web Conf., 141 (2020) 01012DOI: https://doi.org/10.1051/e3sconf/202014101012