Isomerization of α-pinene oxide over ZSM-5 based micro-mesoporous materials

• Published in: Applied catalysis. A, General General, 2018-06, Vol.560, p.236-247
• Main Authors: Shcherban, Nataliya D., Barakov, Roman Yu, Mäki-Arvela, Päivi, Sergiienko, Sergii A., Bezverkhyy, Igor, Eränen, Kari, Murzin, Dmitry Yu
• Format: Article
• Language: English
• Subjects: Accessible acid sites; Chemical Sciences; Micro-Mesoporous material; or physical chemistry; Template; Theoretical and; Trans-Carveol; α-Pinene oxide isomerization
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2018.05.007

[Display omitted] •ZSM-5 based micro-mesoporous materials were evaluated in α-pinene oxide isomerization.•X-ray amorphous samples demonstrated the highest rate of α-pinene oxide isomerization.•Yield of trans-carveol depends on the accessibility and acidity of the catalysts.•2,8-menthadien-1-ol in significant quantities was one of the reaction products. Few types of ZSM-5 based micro-mesoporous materials obtained via a dual template method, steam-assisted conversion and dual-functional templating were evaluated in α-pinene oxide isomerization. Complete conversion and the highest selectivity towards trans-carveol (ca. 40–43%) were achieved over X-ray amorphous micro-mesoporous aluminosilicates as well as mesoporous molecular sieves AlSi-SBA-15. In addition, X-ray amorphous samples containing the secondary building units of ZSM-5 zeolite demonstrated the highest rate of α-pinene oxide isomerization. The yield of the most desired product trans-carveol to a large extent depends on the accessibility of acid sites to the reagents molecules and acidity of the catalysts (strength and concentration of Brønsted and Lewis acid sites).