Strong Acidity of MFI-Type Ferrisilicate Determined by Temperature-Programmed Desorption of Ammonia
โ Scribed by Katada, Naonobu; Miyamoto, Tetsuo; Begum, Hosne Ara; Naito, Norihiro; Niwa, Miki; Matsumoto, Akihiko; Tsutsumi, Kazuo
- Book ID
- 127176659
- Publisher
- American Chemical Society
- Year
- 2000
- Tongue
- English
- Weight
- 249 KB
- Volume
- 104
- Category
- Article
- ISSN
- 0022-3654
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๐ SIMILAR VOLUMES
The acidity of H-form zeolites which include mordenite, ZSM-5, Y-faujasite, and those modified by cation exchange or deahrmination was measured by temperature-programmed desorption (TPD) of NHp. Ammonia was adsorbed at 373 K to eliminate the contribution of very weak acid sites and improve the spect
## Abstaact Mathematical models used to achieve the deconvolution of temperature-programmed desorption (TPD ) spectra from heterogeneous surfaces generally rely on assumptions about the pre-exponential factor or on the variation of the activation energy of desorption with coverage. In contrast, in