TY  - JOUR
AU  - Dang, Fa-Lu
AU  - Wang, Gang
AU  - Lian, Jing-Cun
AU  - Yang, Yu
AU  - Liu, Mei-Jia
PY  - 2025
TI  - Feasibility study of a process for the reduction of sulfur oxides in flue gas of fluid catalytic cracking unit using the riser reactor
JO  - Petroleum Science
SN  - 1672-5107
SP  - 909
EP  - 924
VL  - 22
IS  - 2
AB  - In this work, a new process for achieving the recovery of elemental sulfur by utilizing a fluidized catalytic cracking (FCC) riser reactor for SOx treatment (FCC-DeSOx) is proposed. The process leverages the high temperatures and hydrocarbon concentrations in the FCC riser reactor to convert SOx into H2S. Subsequently, H2S, along with the cracked gas, is processed downstream to produce sulfur. Thermodynamic analysis of the key reduction reactions in the FCC-DeSOx process revealed that complete conversion of SOx to H2S is feasible in the dry gas (hydrogen-rich) prelift zone, as well as the upper and lower zones of the riser, upon achieving thermodynamic equilibrium. Experimental studies were conducted to replicate the conditions of these reaction zones using a low concentration of hydrogen gas as the reducing agent. Through process optimization, investigation of the minimum reaction time, and kinetic studies, the potential of this method for the complete reduction of SOx was further confirmed.
UR  - https://doi.org/10.1016/j.petsci.2024.09.021
DO  - 10.1016/j.petsci.2024.09.021