Research on H_2 or CO Pretreated In/γ-Al_2O_3 Catalyst for SCR-NO AITranslate

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Chinese Library Classification Number:O643[理学—物理化学]

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H2 or CO pretreated In/γ-Al2O3 catalyst has significantly improved activity.Activity test results show pretreatment can enhance catalyst activity due to its effect on indium species from catalyst surface.The improvement of H2 is stronger than CO.XRD results show thatγ-Al2O3 carrier remains original crystal type.IR analysis results show that pretreatment can increase the content of indium low-valence oxides to improve denitrification activity of the catalyst.Because the surface has well dispersed indium particle cluster and chemically adsorbed oxygen,In/γ-Al2O3-H catalyst shows relatively high catalytic activity.Formation of monodentate nitrate and bidentate nitrate on catalyst surface is an important factor to reduce the catalytic activity of the catalyst.The pretreated catalyst has improved activity due to the formation of—NO2 and—ONO.