@article{oai:nagoya.repo.nii.ac.jp:02001507,
 author = {Murata, Kazumasa and Ohyama, Junya and Satsuma, Atsushi},
 issue = {2},
 journal = {Catalysis Science & Technology},
 month = {Jan},
 note = {In the present study, the redispersion behavior of Ag particles on ZSM-5 in the presence of coke was observed using in situ X-ray absorption fine structure (XAFS) spectroscopy. The dynamics of Ag particle redispersion into the ZSM-5 pores were evaluated by linear combination fitting (LCF) of the X-ray absorption near edge structure (XANES) spectra. In addition, the behavior of coke combustion in Ag-ZSM-5 was observed by thermogravimetric analysis (TGA). The rate constant of Ag particle redispersion was smaller than that of coke combustion at ≥500 °C, but it was three times larger than that of coke combustion at <500 °C. According to 27Al magic angle spinning (MAS) nuclear magnetic resonance (NMR), the Ag+ ions in the ZSM-5 pores improved the hydrothermal stability of Ag-ZSM-5. Therefore, a two-step regeneration process, in which the Ag particle redispersion proceeded first at low temperature (<500 °C) followed by a complete combustion of the coke at high temperature (≥500 °C) to prolong the catalyst lifetime, was used.},
 pages = {506--515},
 title = {Kinetic analysis of Ag particle redispersion into ZSM-5 in the presence of coke using in situ XAFS},
 volume = {11},
 year = {2021}
}