TY - JOUR
T1 - One-pot synthesis of highly active Fe-containing MWW zeolite catalyst
T2 - Elucidation of Fe species and its impact on catalytic performance
AU - Xiao, Peipei
AU - Wang, Yong
AU - Osuga, Ryota
AU - Kondo, Junko N.
AU - Yokoi, Toshiyuki
N1 - Publisher Copyright:
© 2021 The Society of Powder Technology Japan
PY - 2021/4
Y1 - 2021/4
N2 - Fe-containing MWW zeolite catalysts in the absence (Fe-MWW) or presence of Al atoms (Fe,Al-MWW) were directly prepared by the hydrothermal synthesis approach. The nature of Fe species was systematically analyzed by UV–vis, in-situ NO adsorption FTIR spectroscopy, and H2-TPR technology. The presence of Al atoms in the synthesis gel seriously affected the chemical composition, textural properties, and the states of Fe species, hence made the catalytic activity in hydroxylation of benzene with H2O2 worse than the one without Al. Moreover, we found that the states of Fe species could be adjusted by changing the calcination temperature. The catalytic activity of Fe-MWW was improved by increasing the calcination temperature, while that of Fe,Al-MWW was weakened due to the degeneration of texture properties and the transformation of Fe species. Fe-MWW zeolite calcined at 750 °C exhibited the highest 8.3% yield and 94% selectivity to phenol in direct hydroxylation of benzene with H2O2.
AB - Fe-containing MWW zeolite catalysts in the absence (Fe-MWW) or presence of Al atoms (Fe,Al-MWW) were directly prepared by the hydrothermal synthesis approach. The nature of Fe species was systematically analyzed by UV–vis, in-situ NO adsorption FTIR spectroscopy, and H2-TPR technology. The presence of Al atoms in the synthesis gel seriously affected the chemical composition, textural properties, and the states of Fe species, hence made the catalytic activity in hydroxylation of benzene with H2O2 worse than the one without Al. Moreover, we found that the states of Fe species could be adjusted by changing the calcination temperature. The catalytic activity of Fe-MWW was improved by increasing the calcination temperature, while that of Fe,Al-MWW was weakened due to the degeneration of texture properties and the transformation of Fe species. Fe-MWW zeolite calcined at 750 °C exhibited the highest 8.3% yield and 94% selectivity to phenol in direct hydroxylation of benzene with H2O2.
KW - Al-MWW
KW - Benzene to phenol
KW - Calcination temperature
KW - Fe
KW - Fe species
KW - Fe-MWW
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U2 - 10.1016/j.apt.2021.02.014
DO - 10.1016/j.apt.2021.02.014
M3 - Article
AN - SCOPUS:85101501838
VL - 32
SP - 1070
EP - 1080
JO - Advanced Powder Technology
JF - Advanced Powder Technology
SN - 0921-8831
IS - 4
ER -