caa a22 4500 469056746 CHVBK 20180323132846.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1163/156856792X00218 doi (NATIONALLICENCE)springer-10.1163/156856792X00218 Lewis acid sites in titanium silicalite [Elektronische Daten] [A. Bittar, A. Adnot, A. Sayari, S. Kaliaguine] Acid properties of titanium silicalite (TS-2) are investigated by means of IR and XPS of chemisorbed pyridine. The results indicate the presence of a weak Lewis acid site, the concentration of which grows as the content in tetrahedral titanium increases. Upon adsorption of pyridine the intensity of the 960 cm-1 IR band diminishes. This is viewed as an additional evidence that the Lewis acid site is the Ti cation involved in the zeolite structure. IR spectra of chemisorbed pyrrole confirm the presence of acid sites and yield no indication of basic sites being present. Springer, 1992 Bittar A. Department of Chemical Engineering and CERPIC, Université Laval, G1K 7P4, Ste-Foy, QC, Canada aut Adnot A. Department of Chemical Engineering and CERPIC, Université Laval, G1K 7P4, Ste-Foy, QC, Canada aut Sayari A. Department of Chemical Engineering and CERPIC, Université Laval, G1K 7P4, Ste-Foy, QC, Canada aut Kaliaguine S. Department of Chemical Engineering and CERPIC, Université Laval, G1K 7P4, Ste-Foy, QC, Canada aut Research on Chemical Intermediates Springer Netherlands 18/1(1992-03-01), 49-59 0922-6168 18:1<49 1992 18 11164 https://doi.org/10.1163/156856792X00218 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1163/156856792X00218 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bittar A. Department of Chemical Engineering and CERPIC, Université Laval, G1K 7P4, Ste-Foy, QC, Canada aut NATIONALLICENCE 700 1- Adnot A. Department of Chemical Engineering and CERPIC, Université Laval, G1K 7P4, Ste-Foy, QC, Canada aut NATIONALLICENCE 700 1- Sayari A. Department of Chemical Engineering and CERPIC, Université Laval, G1K 7P4, Ste-Foy, QC, Canada aut NATIONALLICENCE 700 1- Kaliaguine S. Department of Chemical Engineering and CERPIC, Université Laval, G1K 7P4, Ste-Foy, QC, Canada aut NATIONALLICENCE 773 0- Research on Chemical Intermediates Springer Netherlands 18/1(1992-03-01), 49-59 0922-6168 18:1<49 1992 18 11164 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer