The promotion effect of Fe to Cu-SAPO-34 for selective catalytic reduction of NOx with NH3

Huawang Zhao, Huisheng Li, Xianghui Li, Mengke Liu, Yongdan Li*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

45 Sitaatiot (Scopus)

Abstrakti

A number of Fe loaded Cu-SAPO-34 (Fe: Cu-SAPO–34 = 0.5, 1 and 1.5 wt.%) catalysts were prepared with incipient wetness impregnation of iron acetate solution on a one-pot synthesized Cu-SAPO-34 sample. The Fe/Cu-SAPO-34 sample with 1 wt.% Fe loading shows the best selective catalytic reduction performance among the samples tested at temperatures above 200 °C. The results of ultraviolet-visible diffuse reflectance spectroscopy indicate that isolated Fe3+ ions, FexOy oligomers, and Fe2O3 particles coexist in the Fe incorporated samples. Further examinations tell that the bulk CuO on the surface in the Cu-SAPO-34 sample with appropriate amount of Fe addition transforms to isolated Cu2+ ions, which enhances its catalytic activity in the temperature range of 200–350 °C. The Fe: Cu-SAPO–34 = 1 wt.% sample exhibits a lower NH3 oxidation ability at high temperatures than that of Cu-SAPO-34, which is due to the reduced amount of bulk CuO species on the surface. Both the reduced NH3 oxidation ability and the additional isolated Fe3+ sites contribute to the excellent activity of the Fe: Cu-SAPO-34 = 1 wt.% sample above 350 °C.

AlkuperäiskieliEnglanti
Sivut84-91
Sivumäärä8
JulkaisuCatalysis Today
Vuosikerta297
DOI - pysyväislinkit
TilaJulkaistu - 15 marrask. 2017
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
TapahtumaInternational Symposium on Catalytic Science and Technology in Sustainable Energy and Environment - Tianjin, Kiina
Kesto: 11 lokak. 201614 lokak. 2016
Konferenssinumero: 2

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