Microwave Catalytic Conversion of SO2 and NOx over Cu/zeolite

F. HU, G.H. ZENG, H.Q. LI, Z.S. WEI, J.L. SUN, Q.H. YE, Z.R. XIE

Abstract


Abstract: Microwave catalytic technology is a promising technology for flue gas treatment. Cu/zeolite was used as catalyst for microwave catalytic desulfurization and denitrification and for microwave catalytic reduction of SO2 and NOx with ammonium bicarbonate (NH4HCO3) as a reducing agent. Microwave catalytic desulfurization and denitrification efficiency achieved 76.1 and 81.8% separately. The reaction efficiency of microwave catalytic reduction of SO2 and NOx could be up to 99.8 and 92.8% respectively. The physico-chemical properties of Cu/zeolite catalysts were characterized by X-ray diffraction analysis (XRD), Brunauer-Emmett-Teller measurements (BET), X-ray photoelectron spectrum analysis (XPS), scanning electron microscopy (SEM).The XPS results indicate that sulfide (SO42-), element sulfur (S0) and NH4+ species exist on the catalyst surface after the reaction. Microwave catalytic SO2 and NOx removal follows Langmuir — Hinshelwood(L-H) kinetics.
Key words: Simultaneous desulfurization & denitrification; Microwave catalytic technology; Cu/zeolite; Characterization

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