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|Title:||Acidity and porosity modulation of MWW type zeolites for Nopol production by Prins condensation|
|Keywords:||Exposed acid sites|
Lewis acid sites
|Source:||Wang, J.,Jaenicke, S.,Chuah, G.K.,Hua, W.,Yue, Y.,Gao, Z. (2011-07-01). Acidity and porosity modulation of MWW type zeolites for Nopol production by Prins condensation. Catalysis Communications 12 (12) : 1131-1135. ScholarBank@NUS Repository. https://doi.org/10.1016/j.catcom.2011.03.034|
|Abstract:||Prins condensation of β-pinene with paraformaldehyde was carried out over MCM-22, delaminated ITQ-2 and silica pillared MCM-36. The mesopore-containing MCM-36 and ITQ-2 catalysts exhibit higher conversion of β-pinene due to more exposed acid sites. Lewis acid sites are responsible for Prins condensation while Brønsted acid sites favor the isomerization of pinene. The Brønsted acid sites can be removed mostly by ion-exchanging the zeolites with sodium cations. Thus, NaMWW zeolites had a higher selectivity towards Nopol. Of these, NaITQ-2 showed the highest activity and selectivity, and is a stable and reusable catalyst for production of Nopol. © 2011 Elsevier B.V. All rights reserved.|
|Source Title:||Catalysis Communications|
|Appears in Collections:||Staff Publications|
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