𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On the unusual mechanism of Lewis acidity manifestation in HZSM-5 zeolites

✍ Scribed by A.S. Medin; V.Yu. Borovkov; V.B. Kazansky; A.G. Pelmentschikov; G.M. Zhidomirov

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
405 KB
Volume
10
Category
Article
ISSN
0144-2449

No coin nor oath required. For personal study only.

πŸ“œ SIMILAR VOLUMES

Testing of the Lewis acidity of H-Y and
Testing of the Lewis acidity of H-Y and HZSM-5 zeolites with 15N n.m.r. of adsorbed N2O
✍ V.M. Mastikhin; I.L. Mudrakovsky; S.V. Filimonova πŸ“‚ Article πŸ“… 1990 πŸ› Elsevier Science 🌐 English βš– 378 KB

The Lewis acidity of H-Y and HZSM-5 zeolites has been studied using lSN n.m.r, of adsorbed N20. It follows from lSN n.m.r, data that in H-Y zeolites a variety of Lewis acidic sites having different strengths of acidity is present. The number of the strongest Lewis sites is about 20-30 i~mole/g, i.e.

Characterization of the acid sites in de
Characterization of the acid sites in dealuminated nanosized HZSM-5 zeolite with the probe molecule trimethylphosphine
✍ Weiping Zhang; Xiuwen Han; Xiumei Liu; Xinhe Bao πŸ“‚ Article πŸ“… 2003 πŸ› Elsevier Science 🌐 English βš– 127 KB

The acid sites in dealuminated HZSM-5 zeolite with crystal sizes down to the nanoscale were firstly characterized by the probe molecule trimethylphosphine (TMP). As evidenced by the combination of 31 P CP/MAS NMR, 27 Al MAS and 1 H β†’ 27 Al CP/MAS NMR measurements, the BrΓΆnsted acid sites of both mic