We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Catalytic Isomerization of α-Pinene Epoxide Over a Natural Zeolite.
- Authors
Sánchez-Velandia, Julián E.; Gelves, John F.; Márquez, Marco A.; Dorkis, Ludovic; Villa, Aída-Luz
- Abstract
Isomerization of α-pinene epoxide was carried out over a Colombian natural zeolite as potential geocatalyst with heulandite, chabazite and clipnotilolite as main crystallographic phases; the heulandite was identified as the active phase. Over synthetic zeolites, isomerization of α-pinene epoxide depended on Si/Al ratio, unit cell and the kind of structure. The best solvent was toluene and not isomerization activity was observed in presence of solvents with carboxyl groups. Complete α-pinene epoxide conversion and 45% selectivity to campholenic aldehyde were obtained at 70 °C, with fencholenic aldehyde, carveol, and p-cymene as main by-products. Decrease of activity of natural zeolite was associated with loss of acid sites. A reaction mechanism based on experimental and computational data was proposed including adsorption of α-pinene epoxide on Fe or Al sites of the natural zeolite; a reaction rate constant of 4.02 × 10–4 mol g−1 min−1 was estimated from a pseudo homogeneous kinetic model.
- Subjects
ZEOLITES; PINENE; ISOMERIZATION; UNIT cell; CARBOXYL group; CELL anatomy
- Publication
Catalysis Letters, 2020, Vol 150, Issue 11, p3132
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-020-03225-9