High temperature sulfidation performance of SBA 15-supported MeO-MnO (Me: Cu, Fe, and Zn) sorbents calcined via conventional and microwave methods

The present study aimed to determine the effects of calcination conditions on the sulfidation performance of SBA 15-supported CuO-MnO, FeO-MnO, and ZnO-MnO sorbents. SBA 15-supported MeO-MnO (Me: Cu, Fe, and Zn) sorbents prepared via the wet impregnation method were calcined via conventional heating and microwave radiation at 600 degrees C under an air atmosphere. Sorbents were characterized by X-ray diffraction (XRD) and Brunauer, Emmet and Tellere (BET) analysis. The XRD findings indicate the formation of individual and mixed metal oxides before sulfidation and the conversion of metal sulfides after sulfidation. The BET results revealed that, except for ZnO-MnO, sorbents calcined by microwave radiation have larger surface areas and pore volumes than conventionally calcined sorbents do. For sulfidation testing, argon balanced-simulated flue gas containing 0.033 % H2S, 9 % H-2, 13.5 % CO, and 4.5 % CO2 was passed through the sorbent in a fixed bed quartz reactor at 800 degrees C equipped with a gas chromatography analyzer with a flame photometric detector (FPD). The best sulfidation performance was obtained by the microwaved radiated SBA 15-supported FeO-MnO sorbent with a sulfur capacity of similar to 13 g S/100 g sorbent and a 5.5 h breakthrough time. The sulfidation-regeneration stability during multiple cycles revealed that SBA 15-supported FeO-MnO sorbents can be promising candidates for hot gas sulfur removal. Furthermore, microwave radiation (MW) can be used during calcination because of its cost- and energy-efficient sorbent preparation.

Journal

FUEL

Year

2025

Volume

381

ISSN

0016-2361

eISSN

1873-7153

DOI

10.1016/j.fuel.2024.133507

WoS UID

WOS:001349494400001