Characterization of the acid sites in de
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Weiping Zhang; Xiuwen Han; Xiumei Liu; Xinhe Bao
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Article
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2003
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Elsevier Science
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English
⚖ 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 → 27 Al CP/MAS NMR measurements, the Brönsted acid sites of both mic