Experimental and thermodynamic study on SO2 reduction to elemental sulfur by activated coke and pyrolysis gas: Influence of the reaction atmosphere. (31st July 2020)

• Record Type: Journal Article
• Authors: Feng, Tai; Zhang, Shizhen; Li, Jun; Xia, Xiao; Li, Longzhi; Zhao, Xiqiang; Ma, Chunyuan
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 38(2020)
• Page Start: 20120
• Page End: 20131
• Publication Date: 2020-07-31
• Subjects: Activated coke -- Pyrolysis gas -- Reduction of SO2 -- Elemental sulfur; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.05.087
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: To develop a new process of sulfur recovery for activated coke desulfurization, reduction of sulfur dioxide by activated coke and pyrolysis gas from powder coke fast preparation system was studied experimentally and theoretically. The distribution of gas products in the experiment was measured by GC-MS analyzer and refinery gas analyzer, while the thermodynamic equilibrium data was calculated by the Factsage software. The activated coke presented great catalytic performance for SO2 reduction by CO and H2 . The reactivity of CO reducing SO2 was higher than that of H2, and the two gaseous reducing agents were independent of each other during the reaction process. The effect of CO2 on SO2 reduction was slight, while the participation of H2 O resulted in a significant decrease in S yield. The unsteady state experiment shows that the catalytic ability of activated coke did not affect by reaction between carbon and SO2, CO2 or H2 O. Highlights: The coupling reduction of SO2 with active coke and pyrolysis gas is effective. Activated coke is used as both reducing agent and catalyst in the SO2 reduction. Reduction of SO2 by CO and H2 in activated coke bed is almost mutually independent. CO2 affects SO2 reduction to elemental sulfur to a small degree. The presence of H2 O had a significant negative effect on the SO2 reduction.