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Impact of Forming and Modification with Phosphoric Acid on the Acid Sites of HZSM-5

✍ Scribed by Xue, Nianhua; Olindo, Roberta; Lercher, Johannes A.


Book ID
119949424
Publisher
American Chemical Society
Year
2010
Tongue
English
Weight
388 KB
Volume
114
Category
Article
ISSN
1932-7447

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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