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Application of Principal Component Analysis to the Studies of OH Groups in NaHY Zeolites

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The Si-OH-Al bridging hydroxyls in zeolites are active sites in many important reactions catalyzed by zeolites. Their amount and their acid strength have been extensively studied in many laboratories (for reviews see Refs. 1 and 2). We undertook studies of the heterogeneity of Si-OH-Al groups in zeolites, i.e., the presence of a few kinds of bridging hydroxyls of various acid strength in the same zeolite structure. We studied the heterogeneity of OH groups in NaHZSM-5 zeolites, NaHA zeolite, and NaH faujasites.

Keywords: Acid sites; Hetrogeneity; OH groups; Principal component analysis; Zeolites

Document Type: Short Communication


Affiliations: 1: Faculty of Chemistry, Jagiellonian University, 30-060 Cracow, Ingardena 3, Poland 2: Institute of Physical Chemistry, Friedrich-Schiller-University, 07740 Jena, Lessingstrasse 10, Germany

Publication date: October 1, 1995

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