Isomorphous substitution of chromium in AlPO-11 and AlPO-5 framework and their applications in the aromatization of 3-carene

Authors
Eswaramoorthy, M Mohan, V Krishnasamy, V
Citation
M. Eswaramoorthy et al., Isomorphous substitution of chromium in AlPO-11 and AlPO-5 framework and their applications in the aromatization of 3-carene, I J CHEM A, 40(6), 2001, pp. 605-609
Citations number
29
Categorie Soggetti
Chemistry
Journal title
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY
ISSN journal
03764710 → ACNP
Volume
40
Issue
6
Year of publication
2001
Pages
605 - 609
Database
ISI
SICI code
0376-4710(200106)40:6<605:ISOCIA>2.0.ZU;2-6
Abstract
CrAPO-11 and CrAPO-5 have been synthesized hydrothermally using aluminium i sopropoxide, H3PO4, Cr(NO3)(3) and di-n-propylamine for CrAPO-11 and trieth ylamine for CrAPO-5. The isomorphous substitution of Cr in AlPO-11 and AlPO -5 framework has been confirmed by XRD, SEM, DRS, MAS NMR, TGA, pore-volume and chemical analysis. Formation of cymenes (p-cymene and m-cymene) from 3 -carene is higher over reduced than that over oxidized catalysts. The highe r p/m (p-cymene/m-cymene) ratio, observed over reduced than over oxidized c atalysts shows that p-cymene does not isomerise to m-cymene. The poisoning effects of pyridine and 4-methylquinoline are the same over large pore CrAP O-5 but different over medium pore CrAPO-11.